LiveCycle ES: javax.mail.MessagingException: Could not connect to SMTP host: <hostname>, port: 25

Issue

 If you are trying to send a mail from a process in LiveCycle ES, you may encounter the following exception in the log:

java.lang.RuntimeException: javax.mail.MessagingException: Could not connect to SMTP host: <hostname>, port: 25;
nested exception is:
java.net.SocketException: Software caused connection abort: connect

Reason

 If you are using Virus Scanner software they often block port 25 to prevent worm-type mass mailings.  In McAfee for example, you can verify this if you bring up the VirusScan Console and look at the Access Protection Task. Check the properties for the port settings.

Solution

 You should disable any anti-virus checks on port 25.

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