On Sunday, October 18, 2009 at 05:23 CEST,
Mark Johnson <[email protected]> wrote:
> I created a fake email address and testing on postfix about how did it
> bounce back or report any error on any invalid email address. It
> seemed the postfix just deferred the message.
>
> Here is setup on main.cf
> maximal_backoff_time = 4h
> maximal_queue_lifetime = 8h
> delay_notice_recipient = postmaster
> error_notice_recipient = postmaster
>
>
> Here is the log file:
> Oct 15 03:27:38 postfixmailer postfix/smtp[11216]: 1AF94249A8A:
> to=<[email protected]>, relay=none, delay=46316,
> delays=46296/0.24/20/0, dsn=4.4.3, status=deferred (Host or domain name not
> found. Name service error for name=donotreply.us type=MX: Host not found, try
> again)
Yes, this is the expected result when the DNS for the destination domain
can't provide a definitive answer. donotreply.us probably had a
temporary problem. It works fine now.
$ dig +short mx donotreply.us
10 mailfw3.dd24.net.
10 mailfw2.dd24.net.
If the domain really doesn't exist (i.e. the lookup returns NXDOMAIN)
Postfix will bounce the message immediately.
Please do not top-post.
--
Magnus Bäck
[email protected]
