/dev/rob0 put forth on 12/5/2009 8:44 PM: > This post might seem like a gratuitous me-too, and it partly is, but > the thing that concerned me, as one of the people responsible for > the Spam-L list, was the rejection, in the original post: > >> Dec 4 13:39:15 greer postfix/smtpd[7124]: NOQUEUE: reject: RCPT >> from unknown[204.238.179.8]: 450 4.7.1 <mx1.mfn.org>: Helo command >> rejected: Host not found; from=<spam-l-boun...@spam-l.com> >> to=<s...@hardwarefreak.com> proto=ESMTP helo=<mx1.mfn.org> > > Unknown? Here's what I get: > > 8.179.238.204.in-addr.arpa. 3600 IN PTR mx1.mfn.org. > mx1.mfn.org. 14400 IN A 204.238.179.8 > > That looks like perfect FCrDNS to me. So another issue you ought to > look at: why is your resolver failing on this? Is it consistent?
Yeah, I know. Already chatted with Alif about it. This 450 temp fail is what started all of this. I still got the mail obviously, but I wanted to figure out why my white list entry for spam-l didn't trigger. Thanks to many here, I now know why and am fixing it. It's looking like I was having transient issues with my resolvers. I did some more log digging and found more dns related temp fails than I should be having given my mail volume. I've since switched from the old resolvers to the new free Google resolvers. So far so good. If I run into problems there, I'll switch again or setup my own caching resolver. -- Stan
