[courier-users] backup mx bounces

[Alexander G. <rl...@ch...>]

i have several mail servers running and one mail server is a dedicated 
backup mx (has no local delivery at all). all works fine except, when a 
bounce message is created with <#@[]> as sender on my backup mx, he 
tries to forward ist to my postmaster account on the primary mailserver, 
but cannot do so, because of 517 Syntax error.
the postmaster account normally has to be a local account (i am aware of 
that), but i also want to have all my postmaster mails in one place. is 
there a workaround/tweak for this?

thanx and greets
alex