How can I find out which Postfix version I'm running?
postconf -d | grep mail_version
to find out your Postfix version.
About Falko Timme
Falko Timme is an experienced Linux administrator and founder of Timme Hosting, a leading nginx business hosting company in Germany. He is one of the most active authors on HowtoForge since 2005 and one of the core developers of ISPConfig since 2000. He has also contributed to the O'Reilly book "Linux System Administration".