Hi to all! First excuse me for my bad english! I've a very strange situation in a my costumer: I've installed ISPconfig for a domain xxx.it Customer have 10 account but only 7 are configured in the server and mail are fetched with fetcmail from external provider. ISPconfig is configured to send mail with external host. PROBLEM: When from ad internal account ex. [email protected] xxx.it send mail to ten @ xxx.it or nine @ xxx.it or eight @ xxx.it server respond "user unknow" There is a solution or workaround?