new SMTP_ONLY environment option to disable all courier daemons

Makefile

@@ -25,6 +25,12 @@ run:
 		-v "`pwd`/test":/tmp/test \
 		-e ENABLE_POP3=1 \
 		-h mail.my-domain.com -t $(NAME)
+	docker run -d --name mail_smtponly \
+		-v "`pwd`/postfix":/tmp/postfix \
+		-v "`pwd`/spamassassin":/tmp/spamassassin \
+		-v "`pwd`/test":/tmp/test \
+		-e SMTP_ONLY=1 \
+		-h mail.my-domain.com -t $(NAME)
 	# Wait for containers to fully start
 	sleep 60
 
@@ -47,4 +53,4 @@ clean:
 	# Get default files back
 	git checkout postfix/accounts.cf postfix/virtual
 	# Remove running test containers
-	docker rm -f mail mail_pop3
+	docker rm -f mail mail_pop3 mail_smtponly

start-mailserver.sh

@@ -229,11 +229,15 @@ echo "Starting daemons"
 cron
 /etc/init.d/rsyslog start
 /etc/init.d/saslauthd start
+
+if [ "$SMTP_ONLY" != 1 ]; then
+
 /etc/init.d/courier-authdaemon start
 /etc/init.d/courier-imap start
 /etc/init.d/courier-imap-ssl start
 
-if [ "$ENABLE_POP3" = 1 ]; then
+fi
+if [ "$ENABLE_POP3" = 1 -a "$SMTP_ONLY" != 1 ]; then
   echo "Starting POP3 services"
   /etc/init.d/courier-pop start
   /etc/init.d/courier-pop-ssl start

test/tests.bats

@@ -47,10 +47,26 @@
   [ "$status" -eq 0 ]
 }
 
+@test "checking process: courierpop3d (disabled using SMTP_ONLY)" {
+  run docker exec mail_smtponly /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/courierpop3d'"
+  [ "$status" -eq 1 ]
+}
+
+
 #
 # imap
 #
 
+@test "checking process: courier imaplogin (enabled in default configuration)" {
+  run docker exec mail /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/imaplogin'"
+  [ "$status" -eq 0 ]
+}
+
+@test "checking process: courier imaplogin (disabled using SMTP_ONLY)" {
+  run docker exec mail_smtponly /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/lib/courier/courier/imaplogin'"
+  [ "$status" -eq 1 ]
+}
+
 @test "checking imap: server is ready with STARTTLS" {
   run docker exec mail /bin/bash -c "nc -w 1 0.0.0.0 143 | grep '* OK' | grep 'STARTTLS' | grep 'Courier-IMAP ready'"
   [ "$status" -eq 0 ]