Currently Being ModeratedNov 17, 2012 4:31 PM (in response to LordLobby)
Ok, so I found the cause.
Somehow an alias for email@example.com was added to the local admin user account. I don't have an idea how this happend but might be a quirk in the update procedure.
Hope others will not loose valuable life-time to find this out.
I found this by raising the postfix logging level to a meaningful level since the default level is really to low for a mail-server.