Kolab won't send email from outside users

[xehqter]

Incase anyone runs into this problem.

One of my clients couldn’t send email from outside the network even though SMTP authentication was enabled in outlook. The error message was:

Code:

554 5.7.1 <user@example.org>: Relay access denied

After troubleshooting:

Code:

telnet localhost 25
EHLO localhost

250-AUTH PLAIN LOGIN wasn’t listed meaning the server doesn’t support SMTP authentication.

When I issued the command to authenticate I received:

Code:

538 5.7.0 Encryption required for requested authentication mechanism

The solution was to set smtpd_tls_auth_only=no in /etc/kolab/templates/main.cf.template and run kolabconf