Today I have changed my DSL modem and problems with postfix begun. It receives mail, but cannot send any. In logs I can read Jun 22 19:39:53 server postfix/smtp[5040]: 9A51711FF85: to=address@xxxxxxxxxxxxxx, relay=none, delay=12840, status=deferred (Host or domain name not found. Name service error for name=somedomain.com type=MX: Host not found, try again) My resolv.conf is proper. I can ping any server, but postfix cannot see them. What can I do ? Postfix 2.1.5 Best Regards Kuba ---------------------------------------------------------------------- OMNIXMAIL! Jesli masz telefon w sieci Era i dostep do WAP, to mozesz na komorce odbierac poczte ze wszystkich swoich kont poczty e-mail! OMNIXMAIL jest w Era Omnix: http://link.interia.pl/f1896