SMTP AUTH configuration is complete. Now it is time to start and test the setup. You can run the following command to start the SASL daemon:
sudo /etc/init.d/saslauthd start
To see if SMTP-AUTH and TLS work properly, run the following command:
telnet mail.example.com 25
After you have established the connection to the postfix mail server, type:
If you see the following lines among others, then everything is working perfectly. Type quit to exit.
250-STARTTLS 250-AUTH LOGIN PLAIN 250-AUTH=LOGIN PLAIN 250 8BITMIME