Please, talk me down.

Mark Andrews marka at isc.org
Mon Oct 22 04:18:52 UTC 2012


In message <83452cbbe5c3c5439212c8a56346b283 at mail.dessus.com>, "Keith Medcalf" 
writes:
> > As an aside, you may want to fix your DNS, as some mail receivers don't
> > like this:
>  
> > $ dig -x 72.249.91.101 +short
> > static.serversandhosting.com.
> > $ dig a static.serversandhosting.com +short
> > 72.249.3.27
> 
> What is really meant to be said is that MTA's which require RFC compliance =
> won't talk to you.  Running an MTA which requires minimal RFC compliance (p=
> articularly in respect of DNS configuration) eliminates 98% of spam.

Standards track RFC compliance REQUIRES that you ACCEPT email from that box.
There is no standards track RFC that requires that PTR records exist.
There is no standards track RFC that requires that PTR and address
records are consistent.  It is however good practice that these exist and
are consistent.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org



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