Eray Aslan: > Downgrading from postfix-3.4 fails with: As documented in RELEASE_NOTES.
Incompatible changes with snapshot 20190126-nonprod ==================================================== This introduces a new master.cf service type 'unix-dgram' that is used by the new postlogd(8) daemon. This type is not supported by older Postfix versions. Before backing out to an Postfix 3.3 or earlier, edit the master.cf file and remove the postlog entry.
