I have increased query-errors logging in BIND to level 10. Hopefully that will give us more to work with when the problem re-occurs. Hopefully all the invalid PTRs won’t cause these logs to melt the boxes.
-Rob Heilman > On Apr 28, 2016, at 5:56 PM, Michael Wise <michael.w...@microsoft.com> wrote: > > <> > So is the FORMERR ... just the resolver noting that EDNS is not supported? > If so, I'm uncertain of the issue. > We don't use EDNS here, so that's what the “our” servers should be doing, yes? > > Also, when I replied (“ALL”) to this thread a bit earlier, my response was > bounced by one particular recipient with: > > Error Details > Reported error: 550 5.7.1 Mail rejected - dcc score 1000 > Retry count: 1 > DSN generated by: BY2PR03MB409.namprd03.prod.outlook.com > <http://by2pr03mb409.namprd03.prod.outlook.com/> > Remote server: * > > Traffic to a mailinglist is scored with DCC? > > Aloha, > Michael. > -- > Michael J Wise | Microsoft | Spam Analysis | "Your Spam Specimen Has Been > Processed." | Got the Junk Mail Reporting Tool ? > > -----Original Message----- > From: mailop [mailto:mailop-boun...@mailop.org > <mailto:mailop-boun...@mailop.org>] On Behalf Of Carl Byington > Sent: Thursday, April 28, 2016 2:16 PM > To: mailop@mailop.org <mailto:mailop@mailop.org> > Subject: Re: [mailop] DNS Errors for Microsoft Hostnames > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > On Thu, 2016-04-28 at 20:57 +0000, Michael Wise wrote: > > If the "Aware" flag expired, would best practice not be to check that > > first rather than presuppose that the facility does exist? > > The check for "edns aware" involves sending the query with edns extensions. > If the reply is formerr (or possibly others?), then you can remember that > this server does not understand edns, and repeat the query without it. > > If you just do the first query without edns, there is no mechanism to then > learn that that server does indeed understand edns. > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2.0.14 (GNU/Linux) > > iEYEAREKAAYFAlcifY8ACgkQL6j7milTFsEyTgCfbLe36v3LuECg+Ma4/mjxq52c > C9oAnjFeZYZjl2//eCsWM3NvkeWwthUy > =H2pv > -----END PGP SIGNATURE----- > > > > _______________________________________________ > mailop mailing list > mailop@mailop.org <mailto:mailop@mailop.org> > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > <https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop>_______________________________________________ > mailop mailing list > mailop@mailop.org <mailto:mailop@mailop.org> > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > <https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop>
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