#! /bin/bash
function setup
{
_notify 'tasklog' 'Configuring mail server'
for FUNC in "${FUNCS_SETUP[@]}"
do
${FUNC}
done
}
function _setup_supervisor
{
if ! grep -q "loglevel = ${SUPERVISOR_LOGLEVEL}" /etc/supervisor/supervisord.conf
then
case "${SUPERVISOR_LOGLEVEL}" in
'critical' | 'error' | 'info' | 'debug' )
sed -i -E \
"s|(loglevel).*|\1 = ${SUPERVISOR_LOGLEVEL}|g" \
/etc/supervisor/supervisord.conf
supervisorctl reload
;;
'warn' )
return 0
;;
* )
_notify 'err' \
"SUPERVISOR_LOGLEVEL '${SUPERVISOR_LOGLEVEL}' unknown. Using default 'warn'"
;;
esac
fi
return 0
}
function _setup_default_vars
{
_notify 'task' 'Setting up default variables'
# update POSTMASTER_ADDRESS - must be done done after _check_hostname
POSTMASTER_ADDRESS="${POSTMASTER_ADDRESS:=postmaster@${DOMAINNAME}}"
# update REPORT_SENDER - must be done done after _check_hostname
REPORT_SENDER="${REPORT_SENDER:=mailserver-report@${HOSTNAME}}"
PFLOGSUMM_SENDER="${PFLOGSUMM_SENDER:=${REPORT_SENDER}}"
# set PFLOGSUMM_TRIGGER here for backwards compatibility
# when REPORT_RECIPIENT is on the old method should be used
# ! needs to be a string comparison
if [[ ${REPORT_RECIPIENT} == '0' ]]
then
PFLOGSUMM_TRIGGER="${PFLOGSUMM_TRIGGER:=none}"
else
PFLOGSUMM_TRIGGER="${PFLOGSUMM_TRIGGER:=logrotate}"
fi
# expand address to simplify the rest of the script
if [[ ${REPORT_RECIPIENT} == '0' ]] || [[ ${REPORT_RECIPIENT} == '1' ]]
then
REPORT_RECIPIENT="${POSTMASTER_ADDRESS}"
fi
PFLOGSUMM_RECIPIENT="${PFLOGSUMM_RECIPIENT:=${REPORT_RECIPIENT}}"
LOGWATCH_RECIPIENT="${LOGWATCH_RECIPIENT:=${REPORT_RECIPIENT}}"
VARS[LOGWATCH_RECIPIENT]="${LOGWATCH_RECIPIENT}"
VARS[PFLOGSUMM_RECIPIENT]="${PFLOGSUMM_RECIPIENT}"
VARS[PFLOGSUMM_SENDER]="${PFLOGSUMM_SENDER}"
VARS[PFLOGSUMM_TRIGGER]="${PFLOGSUMM_TRIGGER}"
VARS[POSTMASTER_ADDRESS]="${POSTMASTER_ADDRESS}"
VARS[REPORT_RECIPIENT]="${REPORT_RECIPIENT}"
VARS[REPORT_SENDER]="${REPORT_SENDER}"
: >/root/.bashrc # make DMS variables available in login shells and their subprocesses
: >/etc/dms-settings # this file can be sourced by other scripts
local VAR
for VAR in "${!VARS[@]}"
do
echo "export ${VAR}='${VARS[${VAR}]}'" >>/root/.bashrc
echo "${VAR}='${VARS[${VAR}]}'" >>/etc/dms-settings
done
sort -o /root/.bashrc /root/.bashrc
sort -o /etc/dms-settings /etc/dms-settings
}
# File/folder permissions are fine when using docker volumes, but may be wrong
# when file system folders are mounted into the container.
# Set the expected values and create missing folders/files just in case.
function _setup_file_permissions
{
_notify 'task' 'Setting file/folder permissions'
mkdir -p /var/log/supervisor
mkdir -p /var/log/mail
chown syslog:root /var/log/mail
touch /var/log/mail/clamav.log
chown clamav:adm /var/log/mail/clamav.log
chmod 640 /var/log/mail/clamav.log
touch /var/log/mail/freshclam.log
chown clamav:adm /var/log/mail/freshclam.log
chmod 640 /var/log/mail/freshclam.log
}
function _setup_chksum_file
{
_notify 'task' 'Setting up configuration checksum file'
if [[ -d /tmp/docker-mailserver ]]
then
_notify 'inf' "Creating ${CHKSUM_FILE}"
_monitored_files_checksums >"${CHKSUM_FILE}"
else
# We could just skip the file, but perhaps config can be added later?
# If so it must be processed by the check for changes script
_notify 'inf' "Creating empty ${CHKSUM_FILE} (no config)"
touch "${CHKSUM_FILE}"
fi
}
function _setup_mailname
{
_notify 'task' 'Setting up mailname / creating /etc/mailname'
echo "${DOMAINNAME}" >/etc/mailname
}
function _setup_amavis
{
if [[ ${ENABLE_AMAVIS} -eq 1 ]]
then
_notify 'task' 'Setting up Amavis'
sed -i \
"s|^#\$myhostname = \"mail.example.com\";|\$myhostname = \"${HOSTNAME}\";|" \
/etc/amavis/conf.d/05-node_id
else
_notify 'task' 'Remove Amavis from postfix configuration'
sed -i 's|content_filter =.*|content_filter =|' /etc/postfix/main.cf
[[ ${ENABLE_CLAMAV} -eq 1 ]] && _notify 'warn' 'ClamAV will not work when Amavis is disabled. Remove ENABLE_AMAVIS=0 from your configuration to fix it.'
[[ ${ENABLE_SPAMASSASSIN} -eq 1 ]] && _notify 'warn' 'Spamassassin will not work when Amavis is disabled. Remove ENABLE_AMAVIS=0 from your configuration to fix it.'
fi
}
function _setup_dmarc_hostname
{
_notify 'task' 'Setting up dmarc'
sed -i -e \
"s|^AuthservID.*$|AuthservID ${HOSTNAME}|g" \
-e "s|^TrustedAuthservIDs.*$|TrustedAuthservIDs ${HOSTNAME}|g" \
/etc/opendmarc.conf
}
function _setup_postfix_hostname
{
_notify 'task' 'Applying hostname and domainname to Postfix'
postconf -e "myhostname = ${HOSTNAME}"
postconf -e "mydomain = ${DOMAINNAME}"
}
function _setup_dovecot_hostname
{
_notify 'task' 'Applying hostname to Dovecot'
sed -i \
"s|^#hostname =.*$|hostname = '${HOSTNAME}'|g" \
/etc/dovecot/conf.d/15-lda.conf
}
function _setup_dovecot
{
_notify 'task' 'Setting up Dovecot'
cp -a /usr/share/dovecot/protocols.d /etc/dovecot/
# disable pop3 (it will be eventually enabled later in the script, if requested)
mv /etc/dovecot/protocols.d/pop3d.protocol /etc/dovecot/protocols.d/pop3d.protocol.disab
mv /etc/dovecot/protocols.d/managesieved.protocol /etc/dovecot/protocols.d/managesieved.protocol.disab
sed -i -e 's|#ssl = yes|ssl = yes|g' /etc/dovecot/conf.d/10-master.conf
sed -i -e 's|#port = 993|port = 993|g' /etc/dovecot/conf.d/10-master.conf
sed -i -e 's|#port = 995|port = 995|g' /etc/dovecot/conf.d/10-master.conf
sed -i -e 's|#ssl = yes|ssl = required|g' /etc/dovecot/conf.d/10-ssl.conf
sed -i 's|^postmaster_address = .*$|postmaster_address = '"${POSTMASTER_ADDRESS}"'|g' /etc/dovecot/conf.d/15-lda.conf
# set mail_location according to mailbox format
case "${DOVECOT_MAILBOX_FORMAT}" in
"sdbox" | "mdbox" )
_notify 'inf' "Dovecot ${DOVECOT_MAILBOX_FORMAT} format configured"
sed -i -e \
"s|^mail_location = .*$|mail_location = ${DOVECOT_MAILBOX_FORMAT}:\/var\/mail\/%d\/%n|g" \
/etc/dovecot/conf.d/10-mail.conf
_notify 'inf' 'Enabling cron job for dbox purge'
mv /etc/cron.d/dovecot-purge.disabled /etc/cron.d/dovecot-purge
chmod 644 /etc/cron.d/dovecot-purge
;;
* )
_notify 'inf' "Dovecot maildir format configured (default)"
sed -i -e 's|^mail_location = .*$|mail_location = maildir:\/var\/mail\/%d\/%n|g' /etc/dovecot/conf.d/10-mail.conf
;;
esac
# enable Managesieve service by setting the symlink
# to the configuration file Dovecot will actually find
if [[ ${ENABLE_MANAGESIEVE} -eq 1 ]]
then
_notify 'inf' 'Sieve management enabled'
mv /etc/dovecot/protocols.d/managesieved.protocol.disab /etc/dovecot/protocols.d/managesieved.protocol
fi
# copy pipe and filter programs, if any
rm -f /usr/lib/dovecot/sieve-filter/*
rm -f /usr/lib/dovecot/sieve-pipe/*
[[ -d /tmp/docker-mailserver/sieve-filter ]] && cp /tmp/docker-mailserver/sieve-filter/* /usr/lib/dovecot/sieve-filter/
[[ -d /tmp/docker-mailserver/sieve-pipe ]] && cp /tmp/docker-mailserver/sieve-pipe/* /usr/lib/dovecot/sieve-pipe/
# create global sieve directories
mkdir -p /usr/lib/dovecot/sieve-global/before
mkdir -p /usr/lib/dovecot/sieve-global/after
if [[ -f /tmp/docker-mailserver/before.dovecot.sieve ]]
then
cp /tmp/docker-mailserver/before.dovecot.sieve /usr/lib/dovecot/sieve-global/before/50-before.dovecot.sieve
sievec /usr/lib/dovecot/sieve-global/before/50-before.dovecot.sieve
else
rm -f /usr/lib/dovecot/sieve-global/before/50-before.dovecot.sieve /usr/lib/dovecot/sieve-global/before/50-before.dovecot.svbin
fi
if [[ -f /tmp/docker-mailserver/after.dovecot.sieve ]]
then
cp /tmp/docker-mailserver/after.dovecot.sieve /usr/lib/dovecot/sieve-global/after/50-after.dovecot.sieve
sievec /usr/lib/dovecot/sieve-global/after/50-after.dovecot.sieve
else
rm -f /usr/lib/dovecot/sieve-global/after/50-after.dovecot.sieve /usr/lib/dovecot/sieve-global/after/50-after.dovecot.svbin
fi
# sieve will move spams to .Junk folder when SPAMASSASSIN_SPAM_TO_INBOX=1 and MOVE_SPAM_TO_JUNK=1
if [[ ${SPAMASSASSIN_SPAM_TO_INBOX} -eq 1 ]] && [[ ${MOVE_SPAM_TO_JUNK} -eq 1 ]]
then
_notify 'inf' "Spam messages will be moved to the Junk folder."
cp /etc/dovecot/sieve/before/60-spam.sieve /usr/lib/dovecot/sieve-global/before/
sievec /usr/lib/dovecot/sieve-global/before/60-spam.sieve
else
rm -f /usr/lib/dovecot/sieve-global/before/60-spam.sieve /usr/lib/dovecot/sieve-global/before/60-spam.svbin
fi
chown docker:docker -R /usr/lib/dovecot/sieve*
chmod 550 -R /usr/lib/dovecot/sieve*
chmod -f +x /usr/lib/dovecot/sieve-pipe/*
}
function _setup_dovecot_quota
{
_notify 'task' 'Setting up Dovecot quota'
# Dovecot quota is disabled when using LDAP or SMTP_ONLY or when explicitly disabled.
if [[ ${ENABLE_LDAP} -eq 1 ]] || [[ ${SMTP_ONLY} -eq 1 ]] || [[ ${ENABLE_QUOTAS} -eq 0 ]]
then
# disable dovecot quota in docevot confs
if [[ -f /etc/dovecot/conf.d/90-quota.conf ]]
then
mv /etc/dovecot/conf.d/90-quota.conf /etc/dovecot/conf.d/90-quota.conf.disab
sed -i \
"s|mail_plugins = \$mail_plugins quota|mail_plugins = \$mail_plugins|g" \
/etc/dovecot/conf.d/10-mail.conf
sed -i \
"s|mail_plugins = \$mail_plugins imap_quota|mail_plugins = \$mail_plugins|g" \
/etc/dovecot/conf.d/20-imap.conf
fi
# disable quota policy check in postfix
sed -i "s|check_policy_service inet:localhost:65265||g" /etc/postfix/main.cf
else
if [[ -f /etc/dovecot/conf.d/90-quota.conf.disab ]]
then
mv /etc/dovecot/conf.d/90-quota.conf.disab /etc/dovecot/conf.d/90-quota.conf
sed -i \
"s|mail_plugins = \$mail_plugins|mail_plugins = \$mail_plugins quota|g" \
/etc/dovecot/conf.d/10-mail.conf
sed -i \
"s|mail_plugins = \$mail_plugin|mail_plugins = \$mail_plugins imap_quota|g" \
/etc/dovecot/conf.d/20-imap.conf
fi
local MESSAGE_SIZE_LIMIT_MB=$((POSTFIX_MESSAGE_SIZE_LIMIT / 1000000))
local MAILBOX_LIMIT_MB=$((POSTFIX_MAILBOX_SIZE_LIMIT / 1000000))
sed -i \
"s|quota_max_mail_size =.*|quota_max_mail_size = ${MESSAGE_SIZE_LIMIT_MB}$([[ ${MESSAGE_SIZE_LIMIT_MB} -eq 0 ]] && echo "" || echo "M")|g" \
/etc/dovecot/conf.d/90-quota.conf
sed -i \
"s|quota_rule = \*:storage=.*|quota_rule = *:storage=${MAILBOX_LIMIT_MB}$([[ ${MAILBOX_LIMIT_MB} -eq 0 ]] && echo "" || echo "M")|g" \
/etc/dovecot/conf.d/90-quota.conf
if [[ ! -f /tmp/docker-mailserver/dovecot-quotas.cf ]]
then
_notify 'inf' "'/tmp/docker-mailserver/dovecot-quotas.cf' is not provided. Using default quotas."
: >/tmp/docker-mailserver/dovecot-quotas.cf
fi
# enable quota policy check in postfix
sed -i \
"s|reject_unknown_recipient_domain, reject_rbl_client zen.spamhaus.org|reject_unknown_recipient_domain, check_policy_service inet:localhost:65265, reject_rbl_client zen.spamhaus.org|g" \
/etc/postfix/main.cf
fi
}
function _setup_dovecot_local_user
{
_notify 'task' 'Setting up Dovecot Local User'
: >/etc/postfix/vmailbox
: >/etc/dovecot/userdb
if [[ -f /tmp/docker-mailserver/postfix-accounts.cf ]] && [[ ${ENABLE_LDAP} -ne 1 ]]
then
_notify 'inf' "Checking file line endings"
sed -i 's|\r||g' /tmp/docker-mailserver/postfix-accounts.cf
_notify 'inf' "Regenerating postfix user list"
echo "# WARNING: this file is auto-generated. Modify /tmp/docker-mailserver/postfix-accounts.cf to edit the user list." > /etc/postfix/vmailbox
# checking that /tmp/docker-mailserver/postfix-accounts.cf ends with a newline
# shellcheck disable=SC1003
sed -i -e '$a\' /tmp/docker-mailserver/postfix-accounts.cf
chown dovecot:dovecot /etc/dovecot/userdb
chmod 640 /etc/dovecot/userdb
sed -i -e '/\!include auth-ldap\.conf\.ext/s/^/#/' /etc/dovecot/conf.d/10-auth.conf
sed -i -e '/\!include auth-passwdfile\.inc/s/^#//' /etc/dovecot/conf.d/10-auth.conf
# creating users ; 'pass' is encrypted
# comments and empty lines are ignored
local LOGIN PASS USER_ATTRIBUTES
while IFS=$'|' read -r LOGIN PASS USER_ATTRIBUTES
do
# Setting variables for better readability
USER=$(echo "${LOGIN}" | cut -d @ -f1)
DOMAIN=$(echo "${LOGIN}" | cut -d @ -f2)
# test if user has a defined quota
if [[ -f /tmp/docker-mailserver/dovecot-quotas.cf ]]
then
declare -a USER_QUOTA
IFS=':' read -r -a USER_QUOTA < <(grep "${USER}@${DOMAIN}:" -i /tmp/docker-mailserver/dovecot-quotas.cf)
if [[ ${#USER_QUOTA[@]} -eq 2 ]]
then
USER_ATTRIBUTES="${USER_ATTRIBUTES:+${USER_ATTRIBUTES} }userdb_quota_rule=*:bytes=${USER_QUOTA[1]}"
fi
fi
if [[ -z ${USER_ATTRIBUTES} ]]
then
_notify 'inf' "Creating user '${USER}' for domain '${DOMAIN}'"
else
_notify 'inf' "Creating user '${USER}' for domain '${DOMAIN}' with attributes '${USER_ATTRIBUTES}'"
fi
echo "${LOGIN} ${DOMAIN}/${USER}/" >> /etc/postfix/vmailbox
# Dovecot's userdb has the following format
# user:password:uid:gid:(gecos):home:(shell):extra_fields
echo \
"${LOGIN}:${PASS}:5000:5000::/var/mail/${DOMAIN}/${USER}::${USER_ATTRIBUTES}" \
>>/etc/dovecot/userdb
mkdir -p "/var/mail/${DOMAIN}/${USER}"
# copy user provided sieve file, if present
if [[ -e "/tmp/docker-mailserver/${LOGIN}.dovecot.sieve" ]]
then
cp "/tmp/docker-mailserver/${LOGIN}.dovecot.sieve" "/var/mail/${DOMAIN}/${USER}/.dovecot.sieve"
fi
echo "${DOMAIN}" >> /tmp/vhost.tmp
done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-accounts.cf)
# see https://github.com/docker-mailserver/docker-mailserver/pull/2248#issuecomment-953313852
# for more details on this section
if [[ -f /tmp/docker-mailserver/postfix-virtual.cf ]] && [[ ${ENABLE_QUOTAS} -eq 1 ]]
then
# adding aliases to Dovecot's userdb
# ${REAL_FQUN} is a user's fully-qualified username
local ALIAS REAL_FQUN
while read -r ALIAS REAL_FQUN
do
# ignore comments
[[ ${ALIAS} == \#* ]] && continue
# alias is assumed to not be a proper e-mail
# these aliases do not need to be added to Dovecot's userdb
[[ ! ${ALIAS} == *@* ]] && continue
# clear possibly already filled arrays
# do not remove the following line of code
unset REAL_ACC USER_QUOTA
declare -a REAL_ACC USER_QUOTA
local REAL_USERNAME REAL_DOMAINNAME
REAL_USERNAME=$(cut -d '@' -f 1 <<< "${REAL_FQUN}")
REAL_DOMAINNAME=$(cut -d '@' -f 2 <<< "${REAL_FQUN}")
if ! grep -q "${REAL_FQUN}" /tmp/docker-mailserver/postfix-accounts.cf
then
_notify 'inf' "Alias '${ALIAS}' is non-local (or mapped to a non-existing account) and will not be added to Dovecot's userdb"
continue
fi
_notify 'inf' "Adding alias '${ALIAS}' for user '${REAL_FQUN}' to Dovecot's userdb"
# ${REAL_ACC[0]} => real account name (e-mail address) == ${REAL_FQUN}
# ${REAL_ACC[1]} => password hash
# ${REAL_ACC[2]} => optional user attributes
IFS='|' read -r -a REAL_ACC < <(grep "${REAL_FQUN}" /tmp/docker-mailserver/postfix-accounts.cf)
if [[ -z ${REAL_ACC[1]} ]]
then
dms_panic__misconfigured 'postfix-accounts.cf' 'alias configuration'
fi
# test if user has a defined quota
if [[ -f /tmp/docker-mailserver/dovecot-quotas.cf ]]
then
IFS=':' read -r -a USER_QUOTA < <(grep "${REAL_FQUN}:" -i /tmp/docker-mailserver/dovecot-quotas.cf)
if [[ ${#USER_QUOTA[@]} -eq 2 ]]
then
REAL_ACC[2]="${REAL_ACC[2]:+${REAL_ACC[2]} }userdb_quota_rule=*:bytes=${USER_QUOTA[1]}"
fi
fi
echo \
"${ALIAS}:${REAL_ACC[1]}:5000:5000::/var/mail/${REAL_DOMAINNAME}/${REAL_USERNAME}::${REAL_ACC[2]:-}" \
>> /etc/dovecot/userdb
done < /tmp/docker-mailserver/postfix-virtual.cf
fi
else
_notify 'inf' "'/tmp/docker-mailserver/postfix-accounts.cf' is not provided. No mail account created."
fi
if ! grep '@' /tmp/docker-mailserver/postfix-accounts.cf 2>/dev/null | grep -q '|'
then
if [[ ${ENABLE_LDAP} -eq 0 ]]
then
_shutdown 'Unless using LDAP, you need at least 1 email account to start Dovecot.'
fi
fi
}
function _setup_ldap
{
_notify 'task' 'Setting up Ldap'
_notify 'inf' 'Checking for custom configs'
for i in 'users' 'groups' 'aliases' 'domains'
do
local FPATH="/tmp/docker-mailserver/ldap-${i}.cf"
if [[ -f ${FPATH} ]]
then
cp "${FPATH}" "/etc/postfix/ldap-${i}.cf"
fi
done
_notify 'inf' 'Starting to override configs'
local FILES=(
/etc/postfix/ldap-users.cf
/etc/postfix/ldap-groups.cf
/etc/postfix/ldap-aliases.cf
/etc/postfix/ldap-domains.cf
/etc/postfix/ldap-senders.cf
/etc/postfix/maps/sender_login_maps.ldap
)
for FILE in "${FILES[@]}"
do
[[ ${FILE} =~ ldap-user ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_USER}"
[[ ${FILE} =~ ldap-group ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_GROUP}"
[[ ${FILE} =~ ldap-aliases ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_ALIAS}"
[[ ${FILE} =~ ldap-domains ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_DOMAIN}"
[[ ${FILE} =~ ldap-senders ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_SENDERS}"
configomat.sh "LDAP_" "${FILE}"
done
_notify 'inf' "Configuring dovecot LDAP"
declare -A DOVECOT_LDAP_MAPPING
DOVECOT_LDAP_MAPPING["DOVECOT_BASE"]="${DOVECOT_BASE:="${LDAP_SEARCH_BASE}"}"
DOVECOT_LDAP_MAPPING["DOVECOT_DN"]="${DOVECOT_DN:="${LDAP_BIND_DN}"}"
DOVECOT_LDAP_MAPPING["DOVECOT_DNPASS"]="${DOVECOT_DNPASS:="${LDAP_BIND_PW}"}"
DOVECOT_LDAP_MAPPING["DOVECOT_URIS"]="${DOVECOT_URIS:="${DOVECOT_HOSTS:="${LDAP_SERVER_HOST}"}"}"
# Add protocol to DOVECOT_URIS so that we can use dovecot's "uris" option:
# https://doc.dovecot.org/configuration_manual/authentication/ldap/
if [[ "${DOVECOT_LDAP_MAPPING["DOVECOT_URIS"]}" != *'://'* ]]
then
DOVECOT_LDAP_MAPPING["DOVECOT_URIS"]="ldap://${DOVECOT_LDAP_MAPPING["DOVECOT_URIS"]}"
fi
# Default DOVECOT_PASS_FILTER to the same value as DOVECOT_USER_FILTER
DOVECOT_LDAP_MAPPING["DOVECOT_PASS_FILTER"]="${DOVECOT_PASS_FILTER:="${DOVECOT_USER_FILTER}"}"
for VAR in "${!DOVECOT_LDAP_MAPPING[@]}"
do
export "${VAR}=${DOVECOT_LDAP_MAPPING[${VAR}]}"
done
configomat.sh "DOVECOT_" "/etc/dovecot/dovecot-ldap.conf.ext"
# add domainname to vhost
echo "${DOMAINNAME}" >>/tmp/vhost.tmp
_notify 'inf' "Enabling dovecot LDAP authentification"
sed -i -e '/\!include auth-ldap\.conf\.ext/s/^#//' /etc/dovecot/conf.d/10-auth.conf
sed -i -e '/\!include auth-passwdfile\.inc/s/^/#/' /etc/dovecot/conf.d/10-auth.conf
_notify 'inf' "Configuring LDAP"
if [[ -f /etc/postfix/ldap-users.cf ]]
then
postconf -e "virtual_mailbox_maps = ldap:/etc/postfix/ldap-users.cf" || \
_notify 'inf' "==> Warning: /etc/postfix/ldap-user.cf not found"
fi
if [[ -f /etc/postfix/ldap-domains.cf ]]
then
postconf -e "virtual_mailbox_domains = /etc/postfix/vhost, ldap:/etc/postfix/ldap-domains.cf" || \
_notify 'inf' "==> Warning: /etc/postfix/ldap-domains.cf not found"
fi
if [[ -f /etc/postfix/ldap-aliases.cf ]] && [[ -f /etc/postfix/ldap-groups.cf ]]
then
postconf -e "virtual_alias_maps = ldap:/etc/postfix/ldap-aliases.cf, ldap:/etc/postfix/ldap-groups.cf" || \
_notify 'inf' "==> Warning: /etc/postfix/ldap-aliases.cf or /etc/postfix/ldap-groups.cf not found"
fi
# shellcheck disable=SC2016
sed -i 's|mydestination = \$myhostname, |mydestination = |' /etc/postfix/main.cf
return 0
}
function _setup_postgrey
{
_notify 'inf' "Configuring postgrey"
sed -i -E \
's|, reject_rbl_client zen.spamhaus.org$|, reject_rbl_client zen.spamhaus.org, check_policy_service inet:127.0.0.1:10023|' \
/etc/postfix/main.cf
sed -i -e \
"s|\"--inet=127.0.0.1:10023\"|\"--inet=127.0.0.1:10023 --delay=${POSTGREY_DELAY} --max-age=${POSTGREY_MAX_AGE} --auto-whitelist-clients=${POSTGREY_AUTO_WHITELIST_CLIENTS}\"|" \
/etc/default/postgrey
TEXT_FOUND=$(grep -c -i "POSTGREY_TEXT" /etc/default/postgrey)
if [[ ${TEXT_FOUND} -eq 0 ]]
then
printf "POSTGREY_TEXT=\"%s\"\n\n" "${POSTGREY_TEXT}" >>/etc/default/postgrey
fi
if [[ -f /tmp/docker-mailserver/whitelist_clients.local ]]
then
cp -f /tmp/docker-mailserver/whitelist_clients.local /etc/postgrey/whitelist_clients.local
fi
if [[ -f /tmp/docker-mailserver/whitelist_recipients ]]
then
cp -f /tmp/docker-mailserver/whitelist_recipients /etc/postgrey/whitelist_recipients
fi
}
function _setup_postfix_postscreen
{
_notify 'inf' "Configuring postscreen"
sed -i \
-e "s|postscreen_dnsbl_action = enforce|postscreen_dnsbl_action = ${POSTSCREEN_ACTION}|" \
-e "s|postscreen_greet_action = enforce|postscreen_greet_action = ${POSTSCREEN_ACTION}|" \
-e "s|postscreen_bare_newline_action = enforce|postscreen_bare_newline_action = ${POSTSCREEN_ACTION}|" /etc/postfix/main.cf
}
function _setup_postfix_sizelimits
{
_notify 'inf' "Configuring postfix message size limit"
postconf -e "message_size_limit = ${POSTFIX_MESSAGE_SIZE_LIMIT}"
_notify 'inf' "Configuring postfix mailbox size limit"
postconf -e "mailbox_size_limit = ${POSTFIX_MAILBOX_SIZE_LIMIT}"
_notify 'inf' "Configuring postfix virtual mailbox size limit"
postconf -e "virtual_mailbox_limit = ${POSTFIX_MAILBOX_SIZE_LIMIT}"
}
function _setup_postfix_smtputf8
{
_notify 'inf' "Configuring postfix smtputf8 support (disable)"
postconf -e "smtputf8_enable = no"
}
function _setup_spoof_protection
{
_notify 'inf' "Configuring Spoof Protection"
sed -i \
's|smtpd_sender_restrictions =|smtpd_sender_restrictions = reject_authenticated_sender_login_mismatch,|' \
/etc/postfix/main.cf
if [[ ${ENABLE_LDAP} -eq 1 ]]
then
if [[ -z ${LDAP_QUERY_FILTER_SENDERS} ]]; then
postconf -e "smtpd_sender_login_maps = ldap:/etc/postfix/ldap-users.cf ldap:/etc/postfix/ldap-aliases.cf ldap:/etc/postfix/ldap-groups.cf"
else
postconf -e "smtpd_sender_login_maps = ldap:/etc/postfix/ldap-senders.cf"
fi
else
if [[ -f /etc/postfix/regexp ]]
then
postconf -e "smtpd_sender_login_maps = unionmap:{ texthash:/etc/postfix/virtual, hash:/etc/aliases, pcre:/etc/postfix/maps/sender_login_maps.pcre, pcre:/etc/postfix/regexp }"
else
postconf -e "smtpd_sender_login_maps = texthash:/etc/postfix/virtual, hash:/etc/aliases, pcre:/etc/postfix/maps/sender_login_maps.pcre"
fi
fi
}
function _setup_postfix_access_control
{
_notify 'inf' 'Configuring user access'
if [[ -f /tmp/docker-mailserver/postfix-send-access.cf ]]
then
sed -i 's|smtpd_sender_restrictions =|smtpd_sender_restrictions = check_sender_access texthash:/tmp/docker-mailserver/postfix-send-access.cf,|' /etc/postfix/main.cf
fi
if [[ -f /tmp/docker-mailserver/postfix-receive-access.cf ]]
then
sed -i 's|smtpd_recipient_restrictions =|smtpd_recipient_restrictions = check_recipient_access texthash:/tmp/docker-mailserver/postfix-receive-access.cf,|' /etc/postfix/main.cf
fi
}
function _setup_postfix_sasl
{
if [[ ${ENABLE_SASLAUTHD} -eq 1 ]] && [[ ! -f /etc/postfix/sasl/smtpd.conf ]]
then
cat >/etc/postfix/sasl/smtpd.conf << EOF
pwcheck_method: saslauthd
mech_list: plain login
EOF
fi
if [[ ${ENABLE_SASLAUTHD} -eq 0 ]] && [[ ${SMTP_ONLY} -eq 1 ]]
then
sed -i -E \
's|^smtpd_sasl_auth_enable =.*|smtpd_sasl_auth_enable = no|g' \
/etc/postfix/main.cf
sed -i -E \
's|^ -o smtpd_sasl_auth_enable=.*| -o smtpd_sasl_auth_enable=no|g' \
/etc/postfix/master.cf
fi
}
function _setup_saslauthd
{
_notify 'task' "Setting up SASLAUTHD"
# checking env vars and setting defaults
[[ -z ${SASLAUTHD_MECHANISMS:-} ]] && SASLAUTHD_MECHANISMS=pam
[[ -z ${SASLAUTHD_LDAP_SERVER} ]] && SASLAUTHD_LDAP_SERVER="${LDAP_SERVER_HOST}"
[[ -z ${SASLAUTHD_LDAP_FILTER} ]] && SASLAUTHD_LDAP_FILTER='(&(uniqueIdentifier=%u)(mailEnabled=TRUE))'
[[ -z ${SASLAUTHD_LDAP_BIND_DN} ]] && SASLAUTHD_LDAP_BIND_DN="${LDAP_BIND_DN}"
[[ -z ${SASLAUTHD_LDAP_PASSWORD} ]] && SASLAUTHD_LDAP_PASSWORD="${LDAP_BIND_PW}"
[[ -z ${SASLAUTHD_LDAP_SEARCH_BASE} ]] && SASLAUTHD_LDAP_SEARCH_BASE="${LDAP_SEARCH_BASE}"
if [[ "${SASLAUTHD_LDAP_SERVER}" != *'://'* ]]
then
SASLAUTHD_LDAP_SERVER="ldap://${SASLAUTHD_LDAP_SERVER}"
fi
[[ -z ${SASLAUTHD_LDAP_START_TLS} ]] && SASLAUTHD_LDAP_START_TLS=no
[[ -z ${SASLAUTHD_LDAP_TLS_CHECK_PEER} ]] && SASLAUTHD_LDAP_TLS_CHECK_PEER=no
[[ -z ${SASLAUTHD_LDAP_AUTH_METHOD} ]] && SASLAUTHD_LDAP_AUTH_METHOD=bind
if [[ -z ${SASLAUTHD_LDAP_TLS_CACERT_FILE} ]]
then
SASLAUTHD_LDAP_TLS_CACERT_FILE=""
else
SASLAUTHD_LDAP_TLS_CACERT_FILE="ldap_tls_cacert_file: ${SASLAUTHD_LDAP_TLS_CACERT_FILE}"
fi
if [[ -z ${SASLAUTHD_LDAP_TLS_CACERT_DIR} ]]
then
SASLAUTHD_LDAP_TLS_CACERT_DIR=""
else
SASLAUTHD_LDAP_TLS_CACERT_DIR="ldap_tls_cacert_dir: ${SASLAUTHD_LDAP_TLS_CACERT_DIR}"
fi
if [[ -z ${SASLAUTHD_LDAP_PASSWORD_ATTR} ]]
then
SASLAUTHD_LDAP_PASSWORD_ATTR=""
else
SASLAUTHD_LDAP_PASSWORD_ATTR="ldap_password_attr: ${SASLAUTHD_LDAP_PASSWORD_ATTR}"
fi
if [[ -z ${SASLAUTHD_LDAP_MECH} ]]
then
SASLAUTHD_LDAP_MECH=""
else
SASLAUTHD_LDAP_MECH="ldap_mech: ${SASLAUTHD_LDAP_MECH}"
fi
if [[ ! -f /etc/saslauthd.conf ]]
then
_notify 'inf' 'Creating /etc/saslauthd.conf'
cat > /etc/saslauthd.conf << EOF
ldap_servers: ${SASLAUTHD_LDAP_SERVER}
ldap_auth_method: ${SASLAUTHD_LDAP_AUTH_METHOD}
ldap_bind_dn: ${SASLAUTHD_LDAP_BIND_DN}
ldap_bind_pw: ${SASLAUTHD_LDAP_PASSWORD}
ldap_search_base: ${SASLAUTHD_LDAP_SEARCH_BASE}
ldap_filter: ${SASLAUTHD_LDAP_FILTER}
ldap_start_tls: ${SASLAUTHD_LDAP_START_TLS}
ldap_tls_check_peer: ${SASLAUTHD_LDAP_TLS_CHECK_PEER}
${SASLAUTHD_LDAP_TLS_CACERT_FILE}
${SASLAUTHD_LDAP_TLS_CACERT_DIR}
${SASLAUTHD_LDAP_PASSWORD_ATTR}
${SASLAUTHD_LDAP_MECH}
ldap_referrals: yes
log_level: 10
EOF
fi
sed -i \
-e "/^[^#].*smtpd_sasl_type.*/s/^/#/g" \
-e "/^[^#].*smtpd_sasl_path.*/s/^/#/g" \
/etc/postfix/master.cf
sed -i \
-e "/smtpd_sasl_path =.*/d" \
-e "/smtpd_sasl_type =.*/d" \
-e "/dovecot_destination_recipient_limit =.*/d" \
/etc/postfix/main.cf
gpasswd -a postfix sasl
}
function _setup_postfix_aliases
{
_notify 'task' 'Setting up Postfix Aliases'
: >/etc/postfix/virtual
: >/etc/postfix/regexp
if [[ -f /tmp/docker-mailserver/postfix-virtual.cf ]]
then
# fixing old virtual user file
if grep -q ",$" /tmp/docker-mailserver/postfix-virtual.cf
then
sed -i -e "s|, |,|g" -e "s|,$||g" /tmp/docker-mailserver/postfix-virtual.cf
fi
cp -f /tmp/docker-mailserver/postfix-virtual.cf /etc/postfix/virtual
# the `to` is important, don't delete it
# shellcheck disable=SC2034
while read -r FROM TO
do
UNAME=$(echo "${FROM}" | cut -d @ -f1)
DOMAIN=$(echo "${FROM}" | cut -d @ -f2)
# if they are equal it means the line looks like: "user1 other@domain.tld"
[[ ${UNAME} != "${DOMAIN}" ]] && echo "${DOMAIN}" >>/tmp/vhost.tmp
done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-virtual.cf || true)
else
_notify 'inf' "Warning '/tmp/docker-mailserver/postfix-virtual.cf' is not provided. No mail alias/forward created."
fi
if [[ -f /tmp/docker-mailserver/postfix-regexp.cf ]]
then
_notify 'inf' "Adding regexp alias file postfix-regexp.cf"
cp -f /tmp/docker-mailserver/postfix-regexp.cf /etc/postfix/regexp
sed -i -E \
's|virtual_alias_maps(.*)|virtual_alias_maps\1 pcre:/etc/postfix/regexp|g' \
/etc/postfix/main.cf
fi
_notify 'inf' 'Configuring root alias'
echo "root: ${POSTMASTER_ADDRESS}" > /etc/aliases
if [[ -f /tmp/docker-mailserver/postfix-aliases.cf ]]
then
cat /tmp/docker-mailserver/postfix-aliases.cf >>/etc/aliases
else
_notify 'inf' "'/tmp/docker-mailserver/postfix-aliases.cf' is not provided, it will be auto created."
: >/tmp/docker-mailserver/postfix-aliases.cf
fi
postalias /etc/aliases
}
function _setup_SRS
{
_notify 'task' 'Setting up SRS'
postconf -e "sender_canonical_maps = tcp:localhost:10001"
postconf -e "sender_canonical_classes = ${SRS_SENDER_CLASSES}"
postconf -e "recipient_canonical_maps = tcp:localhost:10002"
postconf -e "recipient_canonical_classes = envelope_recipient,header_recipient"
}
function _setup_dkim
{
_notify 'task' 'Setting up DKIM'
mkdir -p /etc/opendkim && touch /etc/opendkim/SigningTable
# check if any keys are available
if [[ -e "/tmp/docker-mailserver/opendkim/KeyTable" ]]
then
cp -a /tmp/docker-mailserver/opendkim/* /etc/opendkim/
_notify 'inf' "DKIM keys added for: $(ls -C /etc/opendkim/keys/)"
_notify 'inf' "Changing permissions on /etc/opendkim"
chown -R opendkim:opendkim /etc/opendkim/
chmod -R 0700 /etc/opendkim/keys/
else
_notify 'warn' 'No DKIM key provided. Check the documentation on how to get your keys.'
[[ ! -f "/etc/opendkim/KeyTable" ]] && touch "/etc/opendkim/KeyTable"
fi
# setup nameservers paramater from /etc/resolv.conf if not defined
if ! grep '^Nameservers' /etc/opendkim.conf
then
echo "Nameservers $(grep '^nameserver' /etc/resolv.conf | awk -F " " '{print $2}' | paste -sd ',' -)" >> /etc/opendkim.conf
_notify 'inf' "Nameservers added to /etc/opendkim.conf"
fi
}
function _setup_ssl
{
_notify 'task' 'Setting up SSL'
local POSTFIX_CONFIG_MAIN='/etc/postfix/main.cf'
local POSTFIX_CONFIG_MASTER='/etc/postfix/master.cf'
local DOVECOT_CONFIG_SSL='/etc/dovecot/conf.d/10-ssl.conf'
local TMP_DMS_TLS_PATH='/tmp/docker-mailserver/ssl' # config volume
local DMS_TLS_PATH='/etc/dms/tls'
mkdir -p "${DMS_TLS_PATH}"
# Primary certificate to serve for TLS
function _set_certificate
{
local POSTFIX_KEY_WITH_FULLCHAIN=${1}
local DOVECOT_KEY=${1}
local DOVECOT_CERT=${1}
# If a 2nd param is provided, a separate key and cert was received instead of a fullkeychain
if [[ -n ${2} ]]
then
local PRIVATE_KEY=$1
local CERT_CHAIN=$2
POSTFIX_KEY_WITH_FULLCHAIN="${PRIVATE_KEY} ${CERT_CHAIN}"
DOVECOT_KEY="${PRIVATE_KEY}"
DOVECOT_CERT="${CERT_CHAIN}"
fi
# Postfix configuration
# NOTE: `smtpd_tls_chain_files` expects private key defined before public cert chain
# Value can be a single PEM file, or a sequence of files; so long as the order is key->leaf->chain
sedfile -i -r "s|^(smtpd_tls_chain_files =).*|\1 ${POSTFIX_KEY_WITH_FULLCHAIN}|" "${POSTFIX_CONFIG_MAIN}"
# Dovecot configuration
sedfile -i -r \
-e "s|^(ssl_key =).*|\1 <${DOVECOT_KEY}|" \
-e "s|^(ssl_cert =).*|\1 <${DOVECOT_CERT}|" \
"${DOVECOT_CONFIG_SSL}"
}
# Enables supporting two certificate types such as ECDSA with an RSA fallback
function _set_alt_certificate
{
local COPY_KEY_FROM_PATH=$1
local COPY_CERT_FROM_PATH=$2
local PRIVATE_KEY_ALT="${DMS_TLS_PATH}/fallback_key"
local CERT_CHAIN_ALT="${DMS_TLS_PATH}/fallback_cert"
cp "${COPY_KEY_FROM_PATH}" "${PRIVATE_KEY_ALT}"
cp "${COPY_CERT_FROM_PATH}" "${CERT_CHAIN_ALT}"
chmod 600 "${PRIVATE_KEY_ALT}"
chmod 644 "${CERT_CHAIN_ALT}"
# Postfix configuration
# NOTE: This operation doesn't replace the line, it appends to the end of the line.
# Thus this method should only be used when this line has explicitly been replaced earlier in the script.
# Otherwise without `docker-compose down` first, a `docker-compose up` may
# persist previous container state and cause a failure in postfix configuration.
sedfile -i "s|^smtpd_tls_chain_files =.*|& ${PRIVATE_KEY_ALT} ${CERT_CHAIN_ALT}|" "${POSTFIX_CONFIG_MAIN}"
# Dovecot configuration
# Conditionally checks for `#`, in the event that internal container state is accidentally persisted,
# can be caused by: `docker-compose up` run again after a `ctrl+c`, without running `docker-compose down`
sedfile -i -r \
-e "s|^#?(ssl_alt_key =).*|\1 <${PRIVATE_KEY_ALT}|" \
-e "s|^#?(ssl_alt_cert =).*|\1 <${CERT_CHAIN_ALT}|" \
"${DOVECOT_CONFIG_SSL}"
}
function _apply_tls_level
{
local TLS_CIPHERS_ALLOW=$1
local TLS_PROTOCOL_IGNORE=$2
local TLS_PROTOCOL_MINIMUM=$3
# Postfix configuration
sed -i -r \
-e "s|^(smtpd?_tls_mandatory_protocols =).*|\1 ${TLS_PROTOCOL_IGNORE}|" \
-e "s|^(smtpd?_tls_protocols =).*|\1 ${TLS_PROTOCOL_IGNORE}|" \
-e "s|^(tls_high_cipherlist =).*|\1 ${TLS_CIPHERS_ALLOW}|" \
"${POSTFIX_CONFIG_MAIN}"
# Dovecot configuration (secure by default though)
sed -i -r \
-e "s|^(ssl_min_protocol =).*|\1 ${TLS_PROTOCOL_MINIMUM}|" \
-e "s|^(ssl_cipher_list =).*|\1 ${TLS_CIPHERS_ALLOW}|" \
"${DOVECOT_CONFIG_SSL}"
}
# 2020 feature intended for Traefik v2 support only:
# https://github.com/docker-mailserver/docker-mailserver/pull/1553
# Extracts files `key.pem` and `fullchain.pem`.
# `_extract_certs_from_acme` is located in `helper-functions.sh`
# NOTE: See the `SSL_TYPE=letsencrypt` case below for more details.
function _traefik_support
{
if [[ -f /etc/letsencrypt/acme.json ]]
then
# Variable only intended for troubleshooting via debug output
local EXTRACTED_DOMAIN
# Conditional handling depends on the success of `_extract_certs_from_acme`,
# Failure tries the next fallback FQDN to try extract a certificate from.
# Subshell not used in conditional to ensure extraction log output is still captured
if [[ -n ${SSL_DOMAIN} ]] && _extract_certs_from_acme "${SSL_DOMAIN}"
then
EXTRACTED_DOMAIN=('SSL_DOMAIN' "${SSL_DOMAIN}")
elif _extract_certs_from_acme "${HOSTNAME}"
then
EXTRACTED_DOMAIN=('HOSTNAME' "${HOSTNAME}")
elif _extract_certs_from_acme "${DOMAINNAME}"
then
EXTRACTED_DOMAIN=('DOMAINNAME' "${DOMAINNAME}")
else
_notify 'err' "'setup-stack.sh' | letsencrypt (acme.json) failed to identify a certificate to extract"
fi
_notify 'inf' "'setup-stack.sh' | letsencrypt (acme.json) extracted certificate using ${EXTRACTED_DOMAIN[0]}: '${EXTRACTED_DOMAIN[1]}'"
fi
}
# TLS strength/level configuration
case "${TLS_LEVEL}" in
( "modern" )
local TLS_MODERN_SUITE='ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384'
local TLS_MODERN_IGNORE='!SSLv2,!SSLv3,!TLSv1,!TLSv1.1'
local TLS_MODERN_MIN='TLSv1.2'
_apply_tls_level "${TLS_MODERN_SUITE}" "${TLS_MODERN_IGNORE}" "${TLS_MODERN_MIN}"
_notify 'inf' "TLS configured with 'modern' ciphers"
;;
( "intermediate" )
local TLS_INTERMEDIATE_SUITE='ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA'
local TLS_INTERMEDIATE_IGNORE='!SSLv2,!SSLv3'
local TLS_INTERMEDIATE_MIN='TLSv1'
_apply_tls_level "${TLS_INTERMEDIATE_SUITE}" "${TLS_INTERMEDIATE_IGNORE}" "${TLS_INTERMEDIATE_MIN}"
# Lowers the minimum acceptable TLS version connection to `TLSv1` (from Debian upstream `TLSv1.2`)
# Lowers Security Level to `1` (from Debian upstream `2`, openssl release defaults to `1`)
# https://www.openssl.org/docs/man1.1.1/man3/SSL_CTX_set_security_level.html
# https://wiki.debian.org/ContinuousIntegration/TriagingTips/openssl-1.1.1
# https://dovecot.org/pipermail/dovecot/2020-October/120225.html
# TODO: This is a fix for Debian Bullseye Dovecot. Can remove when we only support TLS >=1.2.
# WARNING: This applies to all processes that use openssl and respect these settings.
sedfile -i -r \
-e 's|^(MinProtocol).*|\1 = TLSv1|' \
-e 's|^(CipherString).*|\1 = DEFAULT@SECLEVEL=1|' \
/usr/lib/ssl/openssl.cnf
_notify 'inf' "TLS configured with 'intermediate' ciphers"
;;
( * )
_notify 'err' "TLS_LEVEL not found [ in ${FUNCNAME[0]} ]"
;;
esac
local SCOPE_SSL_TYPE="TLS Setup [SSL_TYPE=${SSL_TYPE}]"
# SSL certificate Configuration
# TODO: Refactor this feature, it's been extended multiple times for specific inputs/providers unnecessarily.
# NOTE: Some `SSL_TYPE` logic uses mounted certs/keys directly, some make an internal copy either retaining filename or renaming.
case "${SSL_TYPE}" in
( "letsencrypt" )
_notify 'inf' "Configuring SSL using 'letsencrypt'"
# `docker-mailserver` will only use one certificate from an FQDN folder in `/etc/letsencrypt/live/`.
# We iterate the sequence [SSL_DOMAIN, HOSTNAME, DOMAINNAME] to find a matching FQDN folder.
# This same sequence is used for the Traefik `acme.json` certificate extraction process, which outputs the FQDN folder.
#
# eg: If HOSTNAME (mail.example.test) doesn't exist, try DOMAINNAME (example.test).
# SSL_DOMAIN if set will take priority and is generally expected to have a wildcard prefix.
# SSL_DOMAIN will have any wildcard prefix stripped for the output FQDN folder it is stored in.
# TODO: A wildcard cert needs to be provisioned via Traefik to validate if acme.json contains any other value for `main` or `sans` beyond the wildcard.
#
# NOTE: HOSTNAME is set via `helper-functions.sh`, it is not the original system HOSTNAME ENV anymore.
# TODO: SSL_DOMAIN is Traefik specific, it no longer seems relevant and should be considered for removal.
_traefik_support
# letsencrypt folders and files mounted in /etc/letsencrypt
local LETSENCRYPT_DOMAIN
local LETSENCRYPT_KEY
# Identify a valid letsencrypt FQDN folder to use.
if [[ -n ${SSL_DOMAIN} ]] && [[ -e /etc/letsencrypt/live/$(_strip_wildcard_prefix "${SSL_DOMAIN}")/fullchain.pem ]]
then
LETSENCRYPT_DOMAIN=$(_strip_wildcard_prefix "${SSL_DOMAIN}")
elif [[ -e /etc/letsencrypt/live/${HOSTNAME}/fullchain.pem ]]
then
LETSENCRYPT_DOMAIN=${HOSTNAME}
elif [[ -e /etc/letsencrypt/live/${DOMAINNAME}/fullchain.pem ]]
then
LETSENCRYPT_DOMAIN=${DOMAINNAME}
else
_notify 'err' "Cannot find a valid DOMAIN for '/etc/letsencrypt/live/<DOMAIN>/', tried: '${SSL_DOMAIN}', '${HOSTNAME}', '${DOMAINNAME}'"
dms_panic__misconfigured 'LETSENCRYPT_DOMAIN' "${SCOPE_SSL_TYPE}"
return 1
fi
# Verify the FQDN folder also includes a valid private key (`privkey.pem` for Certbot, `key.pem` for extraction by Traefik)
if [[ -e /etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/privkey.pem ]]
then
LETSENCRYPT_KEY='privkey'
elif [[ -e /etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/key.pem ]]
then
LETSENCRYPT_KEY='key'
else
_notify 'err' "Cannot find key file ('privkey.pem' or 'key.pem') in '/etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/'"
dms_panic__misconfigured 'LETSENCRYPT_KEY' "${SCOPE_SSL_TYPE}"
return 1
fi
# Update relevant config for Postfix and Dovecot
_notify 'inf' "Adding ${LETSENCRYPT_DOMAIN} SSL certificate to the postfix and dovecot configuration"
# LetsEncrypt `fullchain.pem` and `privkey.pem` contents are detailed here from CertBot:
# https://certbot.eff.org/docs/using.html#where-are-my-certificates
# `key.pem` was added for `simp_le` support (2016): https://github.com/docker-mailserver/docker-mailserver/pull/288
# `key.pem` is also a filename used by the `_extract_certs_from_acme` method (implemented for Traefik v2 only)
local PRIVATE_KEY="/etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/${LETSENCRYPT_KEY}.pem"
local CERT_CHAIN="/etc/letsencrypt/live/${LETSENCRYPT_DOMAIN}/fullchain.pem"
_set_certificate "${PRIVATE_KEY}" "${CERT_CHAIN}"
_notify 'inf' "SSL configured with 'letsencrypt' certificates"
;;
( "custom" ) # (hard-coded path) Use a private key with full certificate chain all in a single PEM file.
_notify 'inf' "Adding ${HOSTNAME} SSL certificate"
# NOTE: Dovecot works fine still as both values are bundled into the keychain
local COMBINED_PEM_NAME="${HOSTNAME}-full.pem"
local TMP_KEY_WITH_FULLCHAIN="${TMP_DMS_TLS_PATH}/${COMBINED_PEM_NAME}"
local KEY_WITH_FULLCHAIN="${DMS_TLS_PATH}/${COMBINED_PEM_NAME}"
if [[ -f ${TMP_KEY_WITH_FULLCHAIN} ]]
then
cp "${TMP_KEY_WITH_FULLCHAIN}" "${KEY_WITH_FULLCHAIN}"
chmod 600 "${KEY_WITH_FULLCHAIN}"
_set_certificate "${KEY_WITH_FULLCHAIN}"
_notify 'inf' "SSL configured with 'CA signed/custom' certificates"
else
dms_panic__no_file "${TMP_KEY_WITH_FULLCHAIN}" "${SCOPE_SSL_TYPE}"
fi
;;
( "manual" ) # (dynamic path via ENV) Use separate private key and cert/chain files (should be PEM encoded)
_notify 'inf' "Configuring certificates using key ${SSL_KEY_PATH} and cert ${SSL_CERT_PATH}"
# Source files are copied internally to these destinations:
local PRIVATE_KEY="${DMS_TLS_PATH}/key"
local CERT_CHAIN="${DMS_TLS_PATH}/cert"
# Fail early:
if [[ -z ${SSL_KEY_PATH} ]] && [[ -z ${SSL_CERT_PATH} ]]
then
dms_panic__no_env 'SSL_KEY_PATH or SSL_CERT_PATH' "${SCOPE_SSL_TYPE}"
fi
if [[ -n ${SSL_ALT_KEY_PATH} ]] \
&& [[ -n ${SSL_ALT_CERT_PATH} ]] \
&& [[ ! -f ${SSL_ALT_KEY_PATH} ]] \
&& [[ ! -f ${SSL_ALT_CERT_PATH} ]]
then
dms_panic__no_file "(ALT) ${SSL_ALT_KEY_PATH} or ${SSL_ALT_CERT_PATH}" "${SCOPE_SSL_TYPE}"
fi
if [[ -f ${SSL_KEY_PATH} ]] && [[ -f ${SSL_CERT_PATH} ]]
then
cp "${SSL_KEY_PATH}" "${PRIVATE_KEY}"
cp "${SSL_CERT_PATH}" "${CERT_CHAIN}"
chmod 600 "${PRIVATE_KEY}"
chmod 644 "${CERT_CHAIN}"
_set_certificate "${PRIVATE_KEY}" "${CERT_CHAIN}"
# Support for a fallback certificate, useful for hybrid/dual ECDSA + RSA certs
if [[ -n ${SSL_ALT_KEY_PATH} ]] && [[ -n ${SSL_ALT_CERT_PATH} ]]
then
_notify 'inf' "Configuring fallback certificates using key ${SSL_ALT_KEY_PATH} and cert ${SSL_ALT_CERT_PATH}"
_set_alt_certificate "${SSL_ALT_KEY_PATH}" "${SSL_ALT_CERT_PATH}"
else
# If the Dovecot settings for alt cert has been enabled (doesn't start with `#`),
# but required ENV var is missing, reset to disabled state:
sed -i -r \
-e 's|^(ssl_alt_key =).*|#\1 </path/to/alternative/key.pem|' \
-e 's|^(ssl_alt_cert =).*|#\1 </path/to/alternative/cert.pem|' \
"${DOVECOT_CONFIG_SSL}"
fi
_notify 'inf' "SSL configured with 'Manual' certificates"
else
dms_panic__no_file "${SSL_KEY_PATH} or ${SSL_CERT_PATH}" "${SCOPE_SSL_TYPE}"
fi
;;
( "self-signed" ) # (hard-coded path) Use separate private key and cert/chain files (should be PEM encoded), expects self-signed CA
_notify 'inf' "Adding ${HOSTNAME} SSL certificate"
local KEY_NAME="${HOSTNAME}-key.pem"
local CERT_NAME="${HOSTNAME}-cert.pem"
# Self-Signed source files:
local SS_KEY="${TMP_DMS_TLS_PATH}/${KEY_NAME}"
local SS_CERT="${TMP_DMS_TLS_PATH}/${CERT_NAME}"
local SS_CA_CERT="${TMP_DMS_TLS_PATH}/demoCA/cacert.pem"
# Source files are copied internally to these destinations:
local PRIVATE_KEY="${DMS_TLS_PATH}/${KEY_NAME}"
local CERT_CHAIN="${DMS_TLS_PATH}/${CERT_NAME}"
local CA_CERT="${DMS_TLS_PATH}/cacert.pem"
if [[ -f ${SS_KEY} ]] \
&& [[ -f ${SS_CERT} ]] \
&& [[ -f ${SS_CA_CERT} ]]
then
cp "${SS_KEY}" "${PRIVATE_KEY}"
cp "${SS_CERT}" "${CERT_CHAIN}"
chmod 600 "${PRIVATE_KEY}"
chmod 644 "${CERT_CHAIN}"
_set_certificate "${PRIVATE_KEY}" "${CERT_CHAIN}"
cp "${SS_CA_CERT}" "${CA_CERT}"
chmod 644 "${CA_CERT}"
# Have Postfix trust the self-signed CA (which is not installed within the OS trust store)
sedfile -i -r "s|^#?(smtpd?_tls_CAfile =).*|\1 ${CA_CERT}|" "${POSTFIX_CONFIG_MAIN}"
# Part of the original `self-signed` support, unclear why this symlink was required?
# May have been to support the now removed `Courier` (Dovecot replaced it):
# https://github.com/docker-mailserver/docker-mailserver/commit/1fb3aeede8ac9707cc9ea11d603e3a7b33b5f8d5
# smtp_tls_CApath and smtpd_tls_CApath both point to /etc/ssl/certs
local PRIVATE_CA="/etc/ssl/certs/cacert-${HOSTNAME}.pem"
ln -s "${CA_CERT}" "${PRIVATE_CA}"
_notify 'inf' "SSL configured with 'self-signed' certificates"
else
dms_panic__no_file "${SS_KEY} or ${SS_CERT}" "${SCOPE_SSL_TYPE}"
fi
;;
( '' ) # No SSL/TLS certificate used/required, plaintext auth permitted over insecure connections
_notify 'warn' "(INSECURE!) SSL configured with plain text access. DO NOT USE FOR PRODUCTION DEPLOYMENT."
# Untested. Not officially supported.
# Postfix configuration:
# smtp_tls_security_level (default: 'may', amavis 'none' x2) | http://www.postfix.org/postconf.5.html#smtp_tls_security_level
# '_setup_postfix_relay_hosts' also adds 'smtp_tls_security_level = encrypt'
# smtpd_tls_security_level (default: 'may', port 587 'encrypt') | http://www.postfix.org/postconf.5.html#smtpd_tls_security_level
#
# smtpd_tls_auth_only (default not applied, 'no', implicitly 'yes' if security_level is 'encrypt')
# | http://www.postfix.org/postconf.5.html#smtpd_tls_auth_only | http://www.postfix.org/TLS_README.html#server_tls_auth
#
# smtp_tls_wrappermode (default: not applied, 'no') | http://www.postfix.org/postconf.5.html#smtp_tls_wrappermode
# smtpd_tls_wrappermode (default: 'yes' for service port 'smtps') | http://www.postfix.org/postconf.5.html#smtpd_tls_wrappermode
# NOTE: Enabling wrappermode requires a security_level of 'encrypt' or stronger. Port 465 presently does not meet this condition.
#
# Postfix main.cf (base config):
sedfile -i -r \
-e "s|^#?(smtpd?_tls_security_level).*|\1 = none|" \
-e "s|^#?(smtpd_tls_auth_only).*|\1 = no|" \
"${POSTFIX_CONFIG_MAIN}"
#
# Postfix master.cf (per connection overrides):
# Disables implicit TLS on port 465 for inbound (smtpd) and outbound (smtp) traffic. Treats it as equivalent to port 25 SMTP with explicit STARTTLS.
# Inbound 465 (aka service port aliases: submissions / smtps) for Postfix to receive over implicit TLS (eg from MUA or functioning as a relay host).
# Outbound 465 as alternative to port 587 when sending to another MTA (with authentication), such as a relay service (eg SendGrid).
sedfile -i -r \
-e "/smtpd?_tls_security_level/s|=.*|=none|" \
-e '/smtpd?_tls_wrappermode/s|yes|no|' \
-e '/smtpd_tls_auth_only/s|yes|no|' \
"${POSTFIX_CONFIG_MASTER}"
# Dovecot configuration:
# https://doc.dovecot.org/configuration_manual/dovecot_ssl_configuration/
# > The plaintext authentication is always allowed (and SSL not required) for connections from localhost, as they’re assumed to be secure anyway.
# > This applies to all connections where the local and the remote IP addresses are equal.
# > Also IP ranges specified by login_trusted_networks setting are assumed to be secure.
#
# no => insecure auth allowed, yes (default) => plaintext auth only allowed over a secure connection (insecure connection acceptable for non-plaintext auth)
local DISABLE_PLAINTEXT_AUTH='no'
# no => disabled, yes => optional (secure connections not required), required (default) => mandatory (only secure connections allowed)
local DOVECOT_SSL_ENABLED='no'
sed -i -r "s|^#?(disable_plaintext_auth =).*|\1 ${DISABLE_PLAINTEXT_AUTH}|" /etc/dovecot/conf.d/10-auth.conf
sed -i -r "s|^(ssl =).*|\1 ${DOVECOT_SSL_ENABLED}|" "${DOVECOT_CONFIG_SSL}"
;;
( 'snakeoil' ) # This is a temporary workaround for testing only, using the insecure snakeoil cert.
# mail_privacy.bats and mail_with_ldap.bats both attempt to make a starttls connection with openssl,
# failing if SSL/TLS is not available.
;;
( * ) # Unknown option, panic.
dms_panic__invalid_value 'SSL_TYPE' "${SCOPE_TLS_LEVEL}"
;;
esac
}
function _setup_postfix_vhost
{
_notify 'task' "Setting up Postfix vhost"
if [[ -f /tmp/vhost.tmp ]]
then
sort < /tmp/vhost.tmp | uniq > /etc/postfix/vhost
rm /tmp/vhost.tmp
elif [[ ! -f /etc/postfix/vhost ]]
then
touch /etc/postfix/vhost
fi
}
function _setup_inet_protocols
{
_notify 'task' 'Setting up POSTFIX_INET_PROTOCOLS option'
postconf -e "inet_protocols = ${POSTFIX_INET_PROTOCOLS}"
}
function _setup_docker_permit
{
_notify 'task' 'Setting up PERMIT_DOCKER Option'
local CONTAINER_IP CONTAINER_NETWORK
unset CONTAINER_NETWORKS
declare -a CONTAINER_NETWORKS
CONTAINER_IP=$(ip addr show "${NETWORK_INTERFACE}" | \
grep 'inet ' | sed 's|[^0-9\.\/]*||g' | cut -d '/' -f 1)
CONTAINER_NETWORK="$(echo "${CONTAINER_IP}" | cut -d '.' -f1-2).0.0"
if [[ -z ${CONTAINER_IP} ]]
then
_notify 'err' 'Detecting the container IP address failed.'
dms_panic__misconfigured 'NETWORK_INTERFACE' 'Network Setup [docker_permit]'
fi
while read -r IP
do
CONTAINER_NETWORKS+=("${IP}")
done < <(ip -o -4 addr show type veth | grep -E -o '[0-9\.]+/[0-9]+')
case "${PERMIT_DOCKER}" in
"host" )
_notify 'inf' "Adding ${CONTAINER_NETWORK}/16 to my networks"
postconf -e "$(postconf | grep '^mynetworks =') ${CONTAINER_NETWORK}/16"
echo "${CONTAINER_NETWORK}/16" >> /etc/opendmarc/ignore.hosts
echo "${CONTAINER_NETWORK}/16" >> /etc/opendkim/TrustedHosts
;;
"network" )
_notify 'inf' "Adding docker network in my networks"
postconf -e "$(postconf | grep '^mynetworks =') 172.16.0.0/12"
echo 172.16.0.0/12 >> /etc/opendmarc/ignore.hosts
echo 172.16.0.0/12 >> /etc/opendkim/TrustedHosts
;;
"connected-networks" )
for NETWORK in "${CONTAINER_NETWORKS[@]}"
do
NETWORK=$(_sanitize_ipv4_to_subnet_cidr "${NETWORK}")
_notify 'inf' "Adding docker network ${NETWORK} in my networks"
postconf -e "$(postconf | grep '^mynetworks =') ${NETWORK}"
echo "${NETWORK}" >> /etc/opendmarc/ignore.hosts
echo "${NETWORK}" >> /etc/opendkim/TrustedHosts
done
;;
* )
_notify 'inf' 'Adding container ip in my networks'
postconf -e "$(postconf | grep '^mynetworks =') ${CONTAINER_IP}/32"
echo "${CONTAINER_IP}/32" >> /etc/opendmarc/ignore.hosts
echo "${CONTAINER_IP}/32" >> /etc/opendkim/TrustedHosts
;;
esac
}
# Requires ENABLE_POSTFIX_VIRTUAL_TRANSPORT=1
function _setup_postfix_virtual_transport
{
_notify 'task' 'Setting up Postfix virtual transport'
if [[ -z ${POSTFIX_DAGENT} ]]
then
dms_panic__no_env 'POSTFIX_DAGENT' 'Postfix Setup [virtual_transport]'
return 1
fi
postconf -e "virtual_transport = ${POSTFIX_DAGENT}"
}
function _setup_postfix_override_configuration
{
_notify 'task' 'Setting up Postfix Override configuration'
if [[ -f /tmp/docker-mailserver/postfix-main.cf ]]
then
while read -r LINE
do
# all valid postfix options start with a lower case letter
# http://www.postfix.org/postconf.5.html
if [[ ${LINE} =~ ^[a-z] ]]
then
postconf -e "${LINE}"
fi
done < /tmp/docker-mailserver/postfix-main.cf
_notify 'inf' "Loaded '/tmp/docker-mailserver/postfix-main.cf'"
else
_notify 'inf' "No extra postfix settings loaded because optional '/tmp/docker-mailserver/postfix-main.cf' not provided."
fi
if [[ -f /tmp/docker-mailserver/postfix-master.cf ]]
then
while read -r LINE
do
if [[ ${LINE} =~ ^[0-9a-z] ]]
then
postconf -P "${LINE}"
fi
done < /tmp/docker-mailserver/postfix-master.cf
_notify 'inf' "Loaded '/tmp/docker-mailserver/postfix-master.cf'"
else
_notify 'inf' "No extra postfix settings loaded because optional '/tmp/docker-mailserver/postfix-master.cf' not provided."
fi
_notify 'inf' "set the compatibility level to 2"
postconf compatibility_level=2
}
function _setup_postfix_sasl_password
{
_notify 'task' 'Setting up Postfix SASL Password'
# support general SASL password
rm -f /etc/postfix/sasl_passwd
if [[ -n ${SASL_PASSWD} ]]
then
echo "${SASL_PASSWD}" >> /etc/postfix/sasl_passwd
fi
# install SASL passwords
if [[ -f /etc/postfix/sasl_passwd ]]
then
chown root:root /etc/postfix/sasl_passwd
chmod 0600 /etc/postfix/sasl_passwd
_notify 'inf' "Loaded SASL_PASSWD"
else
_notify 'inf' "Warning: 'SASL_PASSWD' is not provided. /etc/postfix/sasl_passwd not created."
fi
}
function _setup_postfix_default_relay_host
{
_notify 'task' 'Applying default relay host to Postfix'
_notify 'inf' "Applying default relay host ${DEFAULT_RELAY_HOST} to /etc/postfix/main.cf"
postconf -e "relayhost = ${DEFAULT_RELAY_HOST}"
}
function _setup_postfix_relay_hosts
{
_notify 'task' 'Setting up Postfix Relay Hosts'
[[ -z ${RELAY_PORT} ]] && RELAY_PORT=25
# shellcheck disable=SC2153
_notify 'inf' "Setting up outgoing email relaying via ${RELAY_HOST}:${RELAY_PORT}"
# setup /etc/postfix/sasl_passwd
# --
# @domain1.com postmaster@domain1.com:your-password-1
# @domain2.com postmaster@domain2.com:your-password-2
# @domain3.com postmaster@domain3.com:your-password-3
#
# [smtp.mailgun.org]:587 postmaster@domain2.com:your-password-2
if [[ -f /tmp/docker-mailserver/postfix-sasl-password.cf ]]
then
_notify 'inf' "Adding relay authentication from postfix-sasl-password.cf"
while read -r LINE
do
if ! echo "${LINE}" | grep -q -e "^\s*#"
then
echo "${LINE}" >> /etc/postfix/sasl_passwd
fi
done < /tmp/docker-mailserver/postfix-sasl-password.cf
fi
# add default relay
if [[ -n ${RELAY_USER} ]] && [[ -n ${RELAY_PASSWORD} ]]
then
echo "[${RELAY_HOST}]:${RELAY_PORT} ${RELAY_USER}:${RELAY_PASSWORD}" >> /etc/postfix/sasl_passwd
else
if [[ ! -f /tmp/docker-mailserver/postfix-sasl-password.cf ]]
then
_notify 'warn' "No relay auth file found and no default set"
fi
fi
if [[ -f /etc/postfix/sasl_passwd ]]
then
chown root:root /etc/postfix/sasl_passwd
chmod 0600 /etc/postfix/sasl_passwd
fi
# end /etc/postfix/sasl_passwd
_populate_relayhost_map
postconf -e \
"smtp_sasl_auth_enable = yes" \
"smtp_sasl_security_options = noanonymous" \
"smtp_sasl_password_maps = texthash:/etc/postfix/sasl_passwd" \
"smtp_tls_security_level = encrypt" \
"smtp_tls_note_starttls_offer = yes" \
"smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt" \
"sender_dependent_relayhost_maps = texthash:/etc/postfix/relayhost_map" \
"smtp_sender_dependent_authentication = yes"
}
function _setup_postfix_dhparam
{
_setup_dhparam 'postfix' '/etc/postfix/dhparams.pem'
}
function _setup_dovecot_dhparam
{
_setup_dhparam 'dovecot' '/etc/dovecot/dh.pem'
}
function _setup_dhparam
{
local DH_SERVICE=$1
local DH_DEST=$2
local DH_CUSTOM=/tmp/docker-mailserver/dhparams.pem
_notify 'task' "Setting up ${DH_SERVICE} dhparam"
if [[ -f ${DH_CUSTOM} ]]
then # use custom supplied dh params (assumes they're probably insecure)
_notify 'inf' "${DH_SERVICE} will use custom provided DH paramters."
_notify 'warn' "Using self-generated dhparams is considered insecure. Unless you know what you are doing, please remove ${DH_CUSTOM}."
cp -f "${DH_CUSTOM}" "${DH_DEST}"
else # use official standardized dh params (provided via Dockerfile)
_notify 'inf' "${DH_SERVICE} will use official standardized DH parameters (ffdhe4096)."
fi
}
function _setup_security_stack
{
_notify 'task' "Setting up Security Stack"
# recreate auto-generated file
local DMS_AMAVIS_FILE=/etc/amavis/conf.d/61-dms_auto_generated
echo "# WARNING: this file is auto-generated." >"${DMS_AMAVIS_FILE}"
echo "use strict;" >>"${DMS_AMAVIS_FILE}"
# SpamAssassin
if [[ ${ENABLE_SPAMASSASSIN} -eq 0 ]]
then
_notify 'warn' "Spamassassin is disabled. You can enable it with 'ENABLE_SPAMASSASSIN=1'"
echo "@bypass_spam_checks_maps = (1);" >>"${DMS_AMAVIS_FILE}"
elif [[ ${ENABLE_SPAMASSASSIN} -eq 1 ]]
then
_notify 'inf' "Enabling and configuring spamassassin"
# shellcheck disable=SC2016
sed -i -r 's|^\$sa_tag_level_deflt (.*);|\$sa_tag_level_deflt = '"${SA_TAG}"';|g' /etc/amavis/conf.d/20-debian_defaults
# shellcheck disable=SC2016
sed -i -r 's|^\$sa_tag2_level_deflt (.*);|\$sa_tag2_level_deflt = '"${SA_TAG2}"';|g' /etc/amavis/conf.d/20-debian_defaults
# shellcheck disable=SC2016
sed -i -r 's|^\$sa_kill_level_deflt (.*);|\$sa_kill_level_deflt = '"${SA_KILL}"';|g' /etc/amavis/conf.d/20-debian_defaults
if [[ ${SA_SPAM_SUBJECT} == "undef" ]]
then
# shellcheck disable=SC2016
sed -i -r 's|^\$sa_spam_subject_tag (.*);|\$sa_spam_subject_tag = undef;|g' /etc/amavis/conf.d/20-debian_defaults
else
# shellcheck disable=SC2016
sed -i -r 's|^\$sa_spam_subject_tag (.*);|\$sa_spam_subject_tag = '"'${SA_SPAM_SUBJECT}'"';|g' /etc/amavis/conf.d/20-debian_defaults
fi
# activate short circuits when SA BAYES is certain it has spam or ham.
if [[ ${SA_SHORTCIRCUIT_BAYES_SPAM} -eq 1 ]]
then
# automatically activate the Shortcircuit Plugin
sed -i -r 's|^# loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|g' /etc/spamassassin/v320.pre
sed -i -r 's|^# shortcircuit BAYES_99|shortcircuit BAYES_99|g' /etc/spamassassin/local.cf
fi
if [[ ${SA_SHORTCIRCUIT_BAYES_HAM} -eq 1 ]]
then
# automatically activate the Shortcircuit Plugin
sed -i -r 's|^# loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|loadplugin Mail::SpamAssassin::Plugin::Shortcircuit|g' /etc/spamassassin/v320.pre
sed -i -r 's|^# shortcircuit BAYES_00|shortcircuit BAYES_00|g' /etc/spamassassin/local.cf
fi
if [[ -e /tmp/docker-mailserver/spamassassin-rules.cf ]]
then
cp /tmp/docker-mailserver/spamassassin-rules.cf /etc/spamassassin/
fi
if [[ ${SPAMASSASSIN_SPAM_TO_INBOX} -eq 1 ]]
then
_notify 'inf' 'Configuring Spamassassin/Amavis to send SPAM to inbox'
sed -i "s|\$final_spam_destiny.*=.*$|\$final_spam_destiny = D_PASS;|g" /etc/amavis/conf.d/49-docker-mailserver
sed -i "s|\$final_bad_header_destiny.*=.*$|\$final_bad_header_destiny = D_PASS;|g" /etc/amavis/conf.d/49-docker-mailserver
else
_notify 'inf' 'Configuring Spamassassin/Amavis to bounce SPAM'
sed -i "s|\$final_spam_destiny.*=.*$|\$final_spam_destiny = D_BOUNCE;|g" /etc/amavis/conf.d/49-docker-mailserver
sed -i "s|\$final_bad_header_destiny.*=.*$|\$final_bad_header_destiny = D_BOUNCE;|g" /etc/amavis/conf.d/49-docker-mailserver
if [[ ${VARS[SPAMASSASSIN_SPAM_TO_INBOX_SET]} == 'not set' ]]
then
_notify 'warn' 'Spam messages WILL NOT BE DELIVERED, you will NOT be notified of ANY message bounced. Please define SPAMASSASSIN_SPAM_TO_INBOX explicitly.'
fi
fi
fi
# Clamav
if [[ ${ENABLE_CLAMAV} -eq 0 ]]
then
_notify 'warn' "Clamav is disabled. You can enable it with 'ENABLE_CLAMAV=1'"
echo '@bypass_virus_checks_maps = (1);' >>"${DMS_AMAVIS_FILE}"
elif [[ ${ENABLE_CLAMAV} -eq 1 ]]
then
_notify 'inf' 'Enabling clamav'
fi
echo '1; # ensure a defined return' >>"${DMS_AMAVIS_FILE}"
chmod 444 "${DMS_AMAVIS_FILE}"
# Fail2ban
if [[ ${ENABLE_FAIL2BAN} -eq 1 ]]
then
_notify 'inf' 'Fail2ban enabled'
if [[ -e /tmp/docker-mailserver/fail2ban-fail2ban.cf ]]
then
cp /tmp/docker-mailserver/fail2ban-fail2ban.cf /etc/fail2ban/fail2ban.local
fi
if [[ -e /tmp/docker-mailserver/fail2ban-jail.cf ]]
then
cp /tmp/docker-mailserver/fail2ban-jail.cf /etc/fail2ban/jail.d/user-jail.local
fi
else
# disable logrotate config for fail2ban if not enabled
rm -f /etc/logrotate.d/fail2ban
fi
# fix cron.daily for spamassassin
sed -i -e 's|invoke-rc.d spamassassin reload|/etc/init\.d/spamassassin reload|g' /etc/cron.daily/spamassassin
# Amavis
if [[ ${ENABLE_AMAVIS} -eq 1 ]]
then
_notify 'inf' 'Amavis enabled'
if [[ -f /tmp/docker-mailserver/amavis.cf ]]
then
cp /tmp/docker-mailserver/amavis.cf /etc/amavis/conf.d/50-user
fi
sed -i -E \
"s|(log_level).*|\1 = ${AMAVIS_LOGLEVEL};|g" \
/etc/amavis/conf.d/49-docker-mailserver
fi
}
function _setup_logrotate
{
_notify 'inf' 'Setting up logrotate'
LOGROTATE='/var/log/mail/mail.log\n{\n compress\n copytruncate\n delaycompress\n'
case "${LOGROTATE_INTERVAL}" in
'daily' )
_notify 'inf' 'Setting postfix logrotate interval to daily'
LOGROTATE="${LOGROTATE} rotate 4\n daily\n"
;;
'weekly' )
_notify 'inf' 'Setting postfix logrotate interval to weekly'
LOGROTATE="${LOGROTATE} rotate 4\n weekly\n"
;;
'monthly' )
_notify 'inf' 'Setting postfix logrotate interval to monthly'
LOGROTATE="${LOGROTATE} rotate 4\n monthly\n"
;;
* )
_notify 'warn' 'LOGROTATE_INTERVAL not found in _setup_logrotate'
;;
esac
echo -e "${LOGROTATE}}" >/etc/logrotate.d/maillog
}
function _setup_mail_summary
{
_notify 'inf' "Enable postfix summary with recipient ${PFLOGSUMM_RECIPIENT}"
case "${PFLOGSUMM_TRIGGER}" in
'daily_cron' )
_notify 'inf' 'Creating daily cron job for pflogsumm report'
echo '#! /bin/bash' > /etc/cron.daily/postfix-summary
echo "/usr/local/bin/report-pflogsumm-yesterday ${HOSTNAME} ${PFLOGSUMM_RECIPIENT} ${PFLOGSUMM_SENDER}" >>/etc/cron.daily/postfix-summary
chmod +x /etc/cron.daily/postfix-summary
;;
'logrotate' )
_notify 'inf' 'Add postrotate action for pflogsumm report'
sed -i \
"s|}| postrotate\n /usr/local/bin/postfix-summary ${HOSTNAME} ${PFLOGSUMM_RECIPIENT} ${PFLOGSUMM_SENDER}\n endscript\n}\n|" \
/etc/logrotate.d/maillog
;;
'none' )
_notify 'inf' 'Postfix log summary reports disabled.'
;;
* )
_notify 'err' 'PFLOGSUMM_TRIGGER not found in _setup_mail_summery'
;;
esac
}
function _setup_logwatch
{
_notify 'inf' "Enable logwatch reports with recipient ${LOGWATCH_RECIPIENT}"
echo 'LogFile = /var/log/mail/freshclam.log' >>/etc/logwatch/conf/logfiles/clam-update.conf
case "${LOGWATCH_INTERVAL}" in
'daily' )
_notify 'inf' "Creating daily cron job for logwatch reports"
echo "#! /bin/bash" > /etc/cron.daily/logwatch
echo "/usr/sbin/logwatch --range Yesterday --hostname ${HOSTNAME} --mailto ${LOGWATCH_RECIPIENT}" \
>>/etc/cron.daily/logwatch
chmod 744 /etc/cron.daily/logwatch
;;
'weekly' )
_notify 'inf' "Creating weekly cron job for logwatch reports"
echo "#! /bin/bash" > /etc/cron.weekly/logwatch
echo "/usr/sbin/logwatch --range 'between -7 days and -1 days' --hostname ${HOSTNAME} --mailto ${LOGWATCH_RECIPIENT}" \
>>/etc/cron.weekly/logwatch
chmod 744 /etc/cron.weekly/logwatch
;;
'none' )
_notify 'inf' 'Logwatch reports disabled.'
;;
* )
_notify 'warn' 'LOGWATCH_INTERVAL not found in _setup_logwatch'
;;
esac
}
function _setup_user_patches
{
local USER_PATCHES="/tmp/docker-mailserver/user-patches.sh"
if [[ -f ${USER_PATCHES} ]]
then
_notify 'tasklog' 'Applying user patches'
bash "${USER_PATCHES}"
else
_notify 'inf' "No optional '/tmp/docker-mailserver/user-patches.sh' provided. Skipping."
fi
}
function _setup_fail2ban
{
_notify 'task' 'Setting up fail2ban'
if [[ ${FAIL2BAN_BLOCKTYPE} != "reject" ]]
then
echo -e "[Init]\nblocktype = DROP" > /etc/fail2ban/action.d/iptables-common.local
fi
}