diff --git a/target/start-mailserver.sh b/target/start-mailserver.sh
index 89d27600..7f1bf1b8 100644
--- a/target/start-mailserver.sh
+++ b/target/start-mailserver.sh
@@ -132,12 +132,12 @@ case $SSL_TYPE in
         echo "Adding $(hostname) SSL certificate"
 
         # Postfix configuration
-        sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/letsencrypt\/live\/'$(hostname)'\/fullchain.pem/g' /etc/postfix/main.cf
-        sed -i -r 's/smtpd_tls_key_file=\/etc\/ssl\/private\/ssl-cert-snakeoil.key/smtpd_tls_key_file=\/etc\/letsencrypt\/live\/'$(hostname)'\/'"$KEY"'\.pem/g' /etc/postfix/main.cf
+        sed -i -r 's~smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem~smtpd_tls_cert_file=/etc/letsencrypt/live/'$(hostname)'/fullchain.pem~g' /etc/postfix/main.cf
+        sed -i -r 's~smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key~smtpd_tls_key_file=/etc/letsencrypt/live/'$(hostname)'/'"$KEY"'\.pem~g' /etc/postfix/main.cf
 
         # Dovecot configuration
-        sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/letsencrypt\/live\/'$(hostname)'\/fullchain\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
-        sed -i -e 's/ssl_key = <\/etc\/dovecot\/private\/dovecot\.pem/ssl_key = <\/etc\/letsencrypt\/live\/'$(hostname)'\/'"$KEY"'\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+        sed -i -e 's~ssl_cert = </etc/dovecot/dovecot\.pem~ssl_cert = </etc/letsencrypt/live/'$(hostname)'/fullchain\.pem~g' /etc/dovecot/conf.d/10-ssl.conf
+        sed -i -e 's~ssl_key = </etc/dovecot/private/dovecot\.pem~ssl_key = </etc/letsencrypt/live/'$(hostname)'/'"$KEY"'\.pem~g' /etc/dovecot/conf.d/10-ssl.conf
 
         echo "SSL configured with 'letsencrypt' certificates"
 
@@ -153,12 +153,12 @@ case $SSL_TYPE in
       cp "/tmp/docker-mailserver/ssl/$(hostname)-full.pem" /etc/postfix/ssl
 
       # Postfix configuration
-      sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/postfix\/ssl\/'$(hostname)'-full.pem/g' /etc/postfix/main.cf
-      sed -i -r 's/smtpd_tls_key_file=\/etc\/ssl\/private\/ssl-cert-snakeoil.key/smtpd_tls_key_file=\/etc\/postfix\/ssl\/'$(hostname)'-full.pem/g' /etc/postfix/main.cf
+      sed -i -r 's~smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem~smtpd_tls_cert_file=/etc/postfix/ssl/'$(hostname)'-full.pem~g' /etc/postfix/main.cf
+      sed -i -r 's~smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key~smtpd_tls_key_file=/etc/postfix/ssl/'$(hostname)'-full.pem~g' /etc/postfix/main.cf
 
       # Dovecot configuration
-      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/postfix\/ssl\/'$(hostname)'-full\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
-      sed -i -e 's/ssl_key = <\/etc\/dovecot\/private\/dovecot\.pem/ssl_key = <\/etc\/postfix\/ssl\/'$(hostname)'-full\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's~ssl_cert = </etc/dovecot/dovecot\.pem~ssl_cert = </etc/postfix/ssl/'$(hostname)'-full\.pem~g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's~ssl_key = </etc/dovecot/private/dovecot\.pem~ssl_key = </etc/postfix/ssl/'$(hostname)'-full\.pem~g' /etc/dovecot/conf.d/10-ssl.conf
 
       echo "SSL configured with 'CA signed/custom' certificates"
 
@@ -177,12 +177,12 @@ case $SSL_TYPE in
       chmod 600 /etc/postfix/ssl/key
 
       # Postfix configuration
-      sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/postfix\/ssl\/cert/g' /etc/postfix/main.cf
-      sed -i -r 's/smtpd_tls_key_file=\/etc\/ssl\/private\/ssl-cert-snakeoil.key/smtpd_tls_key_file=\/etc\/postfix\/ssl\/key/g' /etc/postfix/main.cf
+      sed -i -r 's~smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem~smtpd_tls_cert_file=/etc/postfix/ssl/cert~g' /etc/postfix/main.cf
+      sed -i -r 's~smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key~smtpd_tls_key_file=/etc/postfix/ssl/key~g' /etc/postfix/main.cf
 
       # Dovecot configuration
-      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/postfix\/ssl\/cert/g' /etc/dovecot/conf.d/10-ssl.conf
-      sed -i -e 's/ssl_key = <\/etc\/dovecot\/private\/dovecot\.pem/ssl_key = <\/etc\/postfix\/ssl\/key/g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's~ssl_cert = </etc/dovecot/dovecot\.pem~ssl_cert = </etc/postfix/ssl/cert~g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's~ssl_key = </etc/dovecot/private/dovecot\.pem~ssl_key = </etc/postfix/ssl/key~g' /etc/dovecot/conf.d/10-ssl.conf
 
       echo "SSL configured with 'Manual' certificates"
 
@@ -205,15 +205,15 @@ case $SSL_TYPE in
       cp /tmp/docker-mailserver/ssl/demoCA/cacert.pem /etc/postfix/ssl
 
       # Postfix configuration
-      sed -i -r 's/smtpd_tls_cert_file=\/etc\/ssl\/certs\/ssl-cert-snakeoil.pem/smtpd_tls_cert_file=\/etc\/postfix\/ssl\/'$(hostname)'-cert.pem/g' /etc/postfix/main.cf
-      sed -i -r 's/smtpd_tls_key_file=\/etc\/ssl\/private\/ssl-cert-snakeoil.key/smtpd_tls_key_file=\/etc\/postfix\/ssl\/'$(hostname)'-key.pem/g' /etc/postfix/main.cf
-      sed -i -r 's/#smtpd_tls_CAfile=/smtpd_tls_CAfile=\/etc\/postfix\/ssl\/cacert.pem/g' /etc/postfix/main.cf
-      sed -i -r 's/#smtp_tls_CAfile=/smtp_tls_CAfile=\/etc\/postfix\/ssl\/cacert.pem/g' /etc/postfix/main.cf
+      sed -i -r 's~smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem~smtpd_tls_cert_file=/etc/postfix/ssl/'$(hostname)'-cert.pem~g' /etc/postfix/main.cf
+      sed -i -r 's~smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key~smtpd_tls_key_file=/etc/postfix/ssl/'$(hostname)'-key.pem~g' /etc/postfix/main.cf
+      sed -i -r 's~#smtpd_tls_CAfile=~smtpd_tls_CAfile=/etc/postfix/ssl/cacert.pem~g' /etc/postfix/main.cf
+      sed -i -r 's~#smtp_tls_CAfile=~smtp_tls_CAfile=/etc/postfix/ssl/cacert.pem~g' /etc/postfix/main.cf
       ln -s /etc/postfix/ssl/cacert.pem "/etc/ssl/certs/cacert-$(hostname).pem"
 
       # Dovecot configuration
-      sed -i -e 's/ssl_cert = <\/etc\/dovecot\/dovecot\.pem/ssl_cert = <\/etc\/postfix\/ssl\/'$(hostname)'-combined\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
-      sed -i -e 's/ssl_key = <\/etc\/dovecot\/private\/dovecot\.pem/ssl_key = <\/etc\/postfix\/ssl\/'$(hostname)'-key\.pem/g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's~ssl_cert = </etc/dovecot/dovecot\.pem~ssl_cert = </etc/postfix/ssl/'$(hostname)'-combined\.pem~g' /etc/dovecot/conf.d/10-ssl.conf
+      sed -i -e 's~ssl_key = </etc/dovecot/private/dovecot\.pem~ssl_key = </etc/postfix/ssl/'$(hostname)'-key\.pem~g' /etc/dovecot/conf.d/10-ssl.conf
 
       echo "SSL configured with 'self-signed' certificates"
 
@@ -330,7 +330,7 @@ else
 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
+sed -i -e 's~invoke-rc.d spamassassin reload~/etc/init\.d/spamassassin reload~g' /etc/cron.daily/spamassassin
 
 # Consolidate all state that should be persisted across container restarts into one mounted
 # directory