Ok one thing solved the next coms up, My Mailgateway forwards mails to a Postfix/ISPConfig MTA but also to an Exchange MTA that means there are no Exchange users in the 'virtusertable'. Shuld I put them to the 'virtusertable' or is there a better way to do so? At the moment I have a MySQL table for the Exchange users, is it maybe possible to use both MySQL lookups and the 'virtusertable'?
Thanks a lot!!!