I configured a mail server on ubuntu 14.04 using postfix and dovecot. When I'm trying to send mail or receive mail then it's not working and GENERATING no error.
mail log
Jun 11 07:40:18 mail postfix/qmgr[1105]: CF1EC123BD7: from=<[email protected]>, size=732, nrcpt=1 (queue active)
Jun 11 07:40:18 mail postfix/qmgr[1105]: E8A591239D7: from=<[email protected]>, size=3593, nrcpt=1 (queue active)
Jun 11 07:40:18 mail postfix/smtp[6963]: connect to gmail-smtp-in.l.google.com[2607:f8b0:400d:c04::1b]:25: Network is unreachable
Jun 11 07:40:48 mail postfix/smtp[6962]: connect to gmail-smtp-in.l.google.com[74.125.29.26]:25: Connection timed out
Jun 11 07:40:48 mail postfix/smtp[6962]: connect to gmail-smtp-in.l.google.com[2607:f8b0:400d:c04::1b]:25: Network is unreachable
Jun 11 07:40:48 mail postfix/smtp[6962]: connect to alt1.gmail-smtp-in.l.google.com[2800:3f0:4003:c01::1a]:25: Network is unreachable
Jun 11 07:40:48 mail postfix/smtp[6963]: connect to gmail-smtp-in.l.google.com[74.125.29.26]:25: Connection timed out
Jun 11 07:41:18 mail postfix/smtp[6962]: connect to alt1.gmail-smtp-in.l.google.com[64.233.190.26]:25: Connection timed out
Jun 11 07:41:18 mail postfix/smtp[6962]: connect to alt2.gmail-smtp-in.l.google.com[2a00:1450:400b:c02::1b]:25: Network is unreachable
Jun 11 07:41:18 mail postfix/smtp[6963]: connect to alt1.gmail-smtp-in.l.google.com[64.233.190.26]:25: Connection timed out
Jun 11 07:41:18 mail postfix/smtp[6963]: connect to alt1.gmail-smtp-in.l.google.com[2800:3f0:4003:c01::1b]:25: Network is unreachable
Jun 11 07:41:18 mail postfix/smtp[6963]: connect to alt2.gmail-smtp-in.l.google.com[2a00:1450:400b:c02::1b]:25: Network is unreachable
Jun 11 07:41:18 mail postfix/smtp[6962]: CF1EC123BD7: to=<[email protected]>, relay=none, delay=18386, delays=18326/0.02/60/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[2a00:1450:400b:c02::1b]:25: Network is unreachable)
Jun 11 07:41:18 mail postfix/smtp[6963]: E8A591239D7: to=<[email protected]>, relay=none, delay=19458, delays=19398/0.02/60/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[2a00:1450:400b:c02::1b]:25: Network is unreachable)
It's showing Network is unreachable
I'm a beginner. If any one tell me to then it'll help me to go forward.
thank's in advance.