Is there a condition or state that Postfix can enter that will prevent connectivity on port 25?
Am using Javamail to send to postfix as the local MTA, which works about 99% of the time. However, I will occassionally see an exception like:
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25; nested exception is: java.net.ConnectException: Connection refused
So, is it possible one of the queues is filling up and causing this? Is there a state Postfix could be in that will actively refuse a local connection?
Thanks in advance!