Author: Ian Southam Date: To: Sascha E. Pollok CC: exim-users Subject: Re: [Exim] Is rev-DNS checking ok?
On Tue, Mar 07, 2000 at 05:02:32PM +0100 Sascha E. Pollok wrote :
> 421-Reason: domain name verification of your mail server´s
> 421-IP address [195.88.44.1] has failed.
> 421-This is often caused by missing or inconsistent DNS reverse records.
> 421 Please check with your DNS administrator.
> QUIT
>
> Is this political correct?
It is a common anti-spam measure and, if your mail server does not reverse
lookup (or reverses wrongly) a lot of sites will refuse mail.
That said, there is no rfc I know of that mentions this behaviour as being
OK.
