One server with some Internet domains works fine with ISPConfig. Today I've opened one new internal domain, only for internal email. Works too. The problem: this accounts --from the internal email-- can receive Internet messages to email@example.com. We don't want that they receive Internet email. I dont know the reason (evident, sure ) Here some copy&pastes: In virtusertable this internal users doesn't have any internet domain: Code: firstname.lastname@example.org agent5 email@example.com user5 firstname.lastname@example.org user6 email@example.com user6 local-host-names file: Code: localhost [some internet domains] mail.we.local we.local main.cf file: Code: myhostname = mail.somedomain.org (is not the Internet domain that we have tested send firstname.lastname@example.org) <del>mail.we.local and we.local isn't in mydestination main.cf paramenter --I've uncommented it :?</del> Code: $ sudo grep 8A72DEC165 /var/log/mail.log Sep 12 13:10:33 localhost postfix/smtpd: 8A72DEC165: client=mxhub01.mail-provider.net[212.9.x.x] Sep 12 13:10:33 localhost postfix/cleanup: 8A72DEC165: message-id=<email@example.com> Sep 12 13:10:33 localhost postfix/qmgr: 8A72DEC165: from=<firstname.lastname@example.org>, size=3449, nrcpt=1 (queue active) Sep 12 13:10:33 localhost postfix/local: 8A72DEC165: to=<email@example.com>, relay=local, delay=0.15, delays=0.1/0/0/0.05, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail -f-) Sep 12 13:10:33 localhost postfix/qmgr: 8A72DEC165: removed Any orientation in order to get that our local domain doesn't receive Internet email? Thanks in advance!