Use "postconf -d", not "postconf -n". -n is for settings in the configuration file, -d is for the built-in settings which include the version, release date, and so on.
Wietse Charles Marcus: > I asked a long time ago if the postfix version could be added to the > postconf -n output (like dovecot does), but was told it wasn't possible > for some technical reason I didn't understand... > > > On 9/26/2014 9:42 PM, Karl-Philipp <krich...@posteo.de> wrote: > > Hi together, > > In order to figure out the version of a program it is common to make > > the binary print it to stdout if it is invoked with the `--version` > > option. The `postfix` binary should provide it as well. > > >