This issue is best dealt with in the postfix mailing list; however, there
are a few things required to have any hope of understanding what is going
on:
0) which version of postfix are you running (you didn't indicate the
version of centos)
1) postconf -n
2) are you running any of the daemons in chroot (see master.cf)
3) grep 553E01079AD /var/log/maillog
Finally, I am not exactly sure what problem you are seeing (I didn't send
any data, but I appeared to pass the check that you were seeing). So, I
don't think that this is a postfix problem, but rather a transient DNS
issue (which is why postfix responded with a temporary error (451) which
causes a retry). Troubleshoot your DNS plant, and not your SMTP plant.
telnet 200.46.249.100 25
Trying 200.46.249.100...
Connected to mail.elpanama.com (200.46.249.100).
Escape character is '^]'.
220 *** Bienvenido al Sistema IMSS ***
HELO eastern.pmei.com
250 mail.elpanama.com
MAIL FROM: <steve@xxxxxxxx>
250 Ok
RCPT TO: <email.elpanama@xxxxxxxxxxxx>
250 Ok
QUIT
221 Bye
Connection closed by foreign host.
Steve Friedman
On Mon, 4 Jun 2007, Erick Perez wrote:
Hi, I have been given the task to check on a postfix server that
presents the following error:
Let's say you use your hotmail account and then send a message to one
of my users. The postfix program running on the server responds:
Jun 4 10:21:25 mail postfix/smtp[29744]: 553E01079AD:
to=<email.elpanama@xxxxxxxxxxxx>, relay=localhost[127.0.0.1],
delay=54253, status=deferred (host localhost[127.0.0.1] said: 451
Unable to complete command, DNS not available or timed out (in reply
to MAIL FROM command))
first, why is giving me a timeout?
and second, why in the response the to= field has the domain name?
what things can i see in the main.cf?
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