Could Be OT: How many people only accept reverse DNS lookupmail?

[Jeff A. Earickson]

I put require_rdns.m4 back into my sendmail .cf files this morning
and turned this back on.  My previous test was on 6/6/2005, over
a year ago.  I warned our Helpdesk and I'm waiting for my phone
to start screaming...

Jeff Earickson
Colby College

On Thu, 17 Aug 2006, Billy A. Pumphrey wrote:

> Date: Thu, 17 Aug 2006 11:42:59 -0400
> From: Billy A. Pumphrey <bpumphrey at WoodMacLaw.com>
> Reply-To: MailScanner discussion <mailscanner at lists.mailscanner.info>
> To: MailScanner discussion <mailscanner at lists.mailscanner.info>
> Subject: RE: Could Be OT: How many people only accept reverse DNS lookupmail?
> 
>
>> -----Original Message-----
>> From: Michael Baird [mailto:mike at tc3net.com]
>> Sent: Thursday, August 17, 2006 10:24 AM
>> To: MailScanner discussion
>> Subject: Re: Could Be OT: How many people only accept reverse DNS
>> lookupmail?
>>
>> On Thu, 2006-08-17 at 09:11 -0400, Billy A. Pumphrey wrote:
>>> Does anyone only accept email that will do a reverse lookup?  Does
>>> anyone recommend it?
>>
>> I use it on all my inbound MX's, it's pretty standard, you won't see
> any
>> problems using it, all the bigger ISP's implemented it some time ago,
>> and brought the smaller guys into line.
>>
>> I've been testing http://smfs.sourceforge.net/smf-sav.html this milter
>> as well, on a lower pref MX (Spam Catcher). It goes further then just
>> checking reverse DNS, it also checks whether the domain actually
> accepts
>> mail, and if it accepts mail for the specified sender.
>>
>> Regards
>> Michael Baird
>>
>> --
>
> Thank you for everyone's input.  I was configuring my Exchange box some
> and ran across that setting and it came to mind.  Sounds like this
> setting is in the sendmail configuration.  I am going to go ahead and
> configure it.
>
> Do you think I should put this setting in sendmail or exchange or both?
> -- 
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