About 8 Month ago, my postfix worked, now it does not work, does my log file look ok?
Aug 21 17:00:34 localhost postfix/master[9342]: daemon started -- version 2.7.0, configuration /etc/postfix
Aug 21 17:01:11 localhost postfix/smtpd[9354]: connect from localhost.localdomain[127.0.0.1]
Aug 21 17:01:11 localhost postfix/smtpd[9354]: C691694D4F: client=localhost.localdomain[127.0.0.1]
Aug 21 17:01:11 localhost postfix/cleanup[9358]: C691694D4F: message-id=<52152a97a19ea_1f7542665f21564a@li534-212.mail>
Aug 21 17:01:11 localhost postfix/qmgr[9345]: C691694D4F: from=<administrator@mcmdacm.com>, size=746, nrcpt=1 (queue active)
Aug 21 17:01:11 localhost postfix/smtpd[9354]: disconnect from localhost.localdomain[127.0.0.1]
Aug 21 17:01:12 localhost postfix/smtp[9359]: C691694D4F: to=<xxxxx.yyyyy@gmail.com>, relay=gmail-smtp-in.l.google.com[173.194.68.26]:25, delay=0.35, delays=0.05/0.01/0.12/0.16, dsn=2.0.0, status=sent (250 2.0.0 OK 1377118871 f10si5584777qai.16 - gsmtp)
Aug 21 17:01:12 localhost postfix/qmgr[9345]: C691694D4F: removed
(Note: I changed actual email to: xxxxx.yyyyy@gmail.com)
I did some tracing, results below
$ host -t A smtp.gmail.com
smtp.gmail.com is an alias for gmail-smtp-msa.l.google.com.
gmail-smtp-msa.l.google.com has address 173.194.68.108
gmail-smtp-msa.l.google.com has address 173.194.68.109
$ host -t MX gmail.com
gmail.com mail is handled by 30 alt3.gmail-smtp-in.l.google.com.
gmail.com mail is handled by 10 alt1.gmail-smtp-in.l.google.com.
gmail.com mail is handled by 40 alt4.gmail-smtp-in.l.google.com.
gmail.com mail is handled by 5 gmail-smtp-in.l.google.com.
gmail.com mail is handled by 20 alt2.gmail-smtp-in.l.google.com.
$
I am pretty new to email, so is it possible that I was black-listed somewhere by any chance?
Edit 8/22/13: OK, got the answer, email can be sent, but email servers will reject it unless criteria is filled, see the link