> On Nov 7, 2018, at 5:14 PM, James B. Byrne <byrn...@harte-lyne.ca> wrote:
>
> I do not know what is going on here:
>
> This is found in the maillog on inet17
>
> Nov 7 16:40:21 inet17 postfix/smtpd[79991]: NOQUEUE: reject: RCPT
> from unknown[216.185.71.31]: 450 4.1.2
> <r...@samba-01.brockley-2016.harte-lyne.ca>: Recipient address
> rejected: Domain not found; from=<>
> to=<r...@samba-01.brockley-2016.harte-lyne.ca> proto=ESMTP
> helo=<mx31.harte-lyne.ca>
>
> But this is what I get when I run dig on the same host a moment later:
>
> [root@inet17 /var/spool/imap]# dig SAMBA-01.BROCKLEY-2016.HARTE-LYNE.CA
People are telling you the answer, and you're refusing to listen, I find
this puzzling, unless you're no longer getting email from the list (which
seems plausible). Every MTA will perform *MX* lookups on the envelope
sender domain, before it looks for any *A* records. When the *MX* lookups
fail, your domain is down, and your mail will tempfail.
$ dig -t mx SAMBA-01.BROCKLEY-2016.HARTE-LYNE.CA
; <<>> DiG 9.11.2 <<>> -t mx SAMBA-01.BROCKLEY-2016.HARTE-LYNE.CA
;; global options: +cmd
;; connection timed out; no servers could be reached
Your DNS is broken. Fix it! At the .CA level you have:
harte-lyne.ca. IN NS dns04.harte-lyne.ca. ; AD=0
harte-lyne.ca. IN NS dns03.harte-lyne.ca. ; AD=0
harte-lyne.ca. IN NS dns01.harte-lyne.ca. ; AD=0
harte-lyne.ca. IN NS dns02.harte-lyne.ca. ; AD=0
dns01.harte-lyne.ca. IN A 216.185.71.33 ; AD=0
dns02.harte-lyne.ca. IN A 209.47.176.33 ; AD=0
dns03.harte-lyne.ca. IN A 216.185.71.34 ; AD=0
dns04.harte-lyne.ca. IN A 209.47.176.34 ; AD=0
and DS records:
harte-lyne.ca. IN DS 34011 8 1 4d8a16b5fe3dbfafe3de6d9631d5e17bc5264daf ;
NoError AD=0
harte-lyne.ca. IN DS 37852 8 1 25f0408ace2e07f38fcb5c04bcb80a542eab59ee ;
NoError AD=0
harte-lyne.ca. IN DS 37852 8 2
263785e078032bb2c961a8d2c8a5f76477db388ecac46bf7299f88e6368f3c49 ; NoError AD=0
Below that things look rather grim, your nameservers need attention.
--
Viktor.
