I am very new to ispconfig. So far look good. But one issue is, I can recieve mail but can not send. Feb 24 23:29:52 mail postfix/error: 145A0AFC952: to=<[email protected]>, relay=none, delay=0.16, delays=0.05/0.05/0/0.06, dsn=4.4.3, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=gmail.com type=MX: Host not found, try again) So I tested dns with; [email protected]:~# dig google.com ; <<>> DiG 9.8.4-rpz2+rl005.12-P1 <<>> google.com ;; global options: +cmd ;; connection timed out; no servers could be reached Ok my /etc/resolv.conf: search somedomain.com nameserver 18.104.22.168 nameserver 22.214.171.124 nameserver 126.96.36.199 What is the problem you think?