Preamble: We have configured usernames to be email@example.com (This results in Unix Usernames being username-domain.com)
I created an email address: firstname.lastname@example.org
and added forward:
That got accepted. However, postfix returned mails to sender to email email@example.com with users membera and memberb unknown.
I could do a workaround with a forward to:
Looks like postfix was playing "smart" removing @domain.com then looking for unix users...
But that is beyond normal hosting users skills, so maybe accepting the normal way to write the forwards could be cool for normal users. ;-)
So from a normal user perspective this is a bug imho.