I believe it's the way your exim is configured. Read this: http://www.exim.org/...doc/html/spec_5.html. Specifically, 5.2 on trusted users and the section describing the -f option.
Gossamer Mail uses the -f option to correctly set the Return-Path header of the email. Your exim installation isn't allowing this and thus making it your shell login afire@master.xxx The result of this is that any mail sent out by your users that bounces will likely be returned to your afire@master.xxx account instead of the gossamer mail user.
I've never used Exim, but from the documentation, it sounds like one way to fix this is to add your afire user to the trusted_users list in the exim configuration.
Adrian
Gossamer Mail uses the -f option to correctly set the Return-Path header of the email. Your exim installation isn't allowing this and thus making it your shell login afire@master.xxx The result of this is that any mail sent out by your users that bounces will likely be returned to your afire@master.xxx account instead of the gossamer mail user.
I've never used Exim, but from the documentation, it sounds like one way to fix this is to add your afire user to the trusted_users list in the exim configuration.
Adrian
