Hello, I have setup a server with this great howto: http://www.howtoforge.com/perfect-server-ubuntu-10.04-lucid-lynx-ispconfig-3 Everything works fine, but i have the following situation: i use the e-mail domain from my isp (@aon.at) with getmail. All outgoing mail goes to the smtp server from the isp. if i send a e-mail to an address, that is not in my virtual mailbox table, for example: firstname.lastname@example.org, i get the following message: send to all other domains works. is it possible to forward those mail to an external relay host? In Exchange 2003 i had to delegate the domain as non-authoritative and added a transport for aon.at. All unresolved adresses would be forwarded to the specified host. Is this possible with ISPConfig3? Any Help would be greatly appreciated. Thanks.