On Tue, Nov 26, 2013 at 03:54:57PM -0500, Wietse Venema wrote:
> Lucas Bergman:
>
> > Nov 25 14:06:23 gob postfix/smtpd[19293]: NOQUEUE: reject: RCPT from
> > unknown[12.229.68.221]: 450 4.1.8 <circ...@lcplin.org>: Sender address
> > rejected: Domain not found; from=<circ...@lcplin.org> to=<[REDACTED]@
> > BERGMANS.US> proto=ESMTP helo=<sangria.lcplin.org>
>
> 450 Means that Postfix did not receive a DNS reply. There could
> have been a network outage, or your link was saturated, or whatever.
And in any case PTR lookups have nothing to do with
reject_unknown_sender_domain. The lookups in question are basically:
$ dig +short -t mx lcplin.org
20 grid2i.seg.att.com.
10 grid1i.seg.att.com.
$ dig +noall +ans -t a grid1i.seg.att.com.
grid1i.seg.att.com. 28800 IN A 209.65.160.81
grid1i.seg.att.com. 28800 IN A 209.65.160.73
$ dig +noall +ans -t a grid2i.seg.att.com.
grid2i.seg.att.com. 28800 IN A 209.65.160.89
grid2i.seg.att.com. 28800 IN A 209.65.176.73
grid2i.seg.att.com. 28800 IN A 209.65.176.81
Either the MX lookup or the A record lookups tempfailed.
--
Viktor.
