On Friday 26 November 2010 16:01:37 Sven Gehr wrote: > I send mails via the relay: mail.gehr-edv.de. I have add this host in the > kolab-admin-interface but where cat I set the username/pass to send mails > this relay-host? http://www.freelock.com/kb/postfix-relayhost This should provide the necessary clue Alex