about the A and PTR for sending mail

[Murray S. Kucherawy]

> -----Original Message-----
> From: bind-users-bounces+msk=cloudmark.com at lists.isc.org [mailto:bind-users-bounces+msk=cloudmark.com at lists.isc.org] On Behalf Of Mark Andrews
> Sent: Wednesday, November 09, 2011 7:06 PM
> To: 风河
> Cc: bind-users at isc.org
> Subject: Re: about the A and PTR for sending mail
> 
> While there is no RFC requirement that they match is there any reason
> not to make them match (the above records don't match) given that is
> the intent of the IN-ADDR.ARPA namespace?

Ideally I would agree, but there are some passable operational reasons for this to happen, and there are also some good operational ones as we enter IPv6-land.

Instead, I agree with another poster who suggested a mismatch or absence of this data in the DNS is good input to a scoring system, but not good grounds for outright rejection.

-MSK