RE: Reverse DNS

  • From: "Lara, Greg" <GLara@xxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Fri, 12 Nov 2004 10:10:09 -0500

I agree. We tried that for a while, but it proved extremely unreliable,
given the huge number of systems that either aren't correctly configured or
have a legitimate reason for not having a matching hostname/reverse DNS
entry. You'll lose a lot of legitimate mail.


Greg Lara

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-----Original Message-----
From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] 
Sent: Thursday, November 11, 2004 8:02 PM
To: [ExchangeList]
Subject: [exchangelist] RE: Reverse DNS

http://www.MSExchange.org/

Do not do that. That is not used to block spam. Only AOL, who thinks they
are a god, attempts to get away with that kind of nonsense.

John Tolmachoff
Engineer/Consultant/Owner
eServices For You


> -----Original Message-----
> From: Darren Haun [mailto:dhaun@xxxxxxxxxxxxx]
> Sent: Thursday, November 11, 2004 7:15 AM
> To: [ExchangeList]
> Subject: [exchangelist] Reverse DNS
> 
> http://www.MSExchange.org/
> 
> How do you set up Reverse DNS on your Exchange Server to reject messages
> that don't correspond to the IP address/Reverse DNS entry.  This tactic is
> usually used to block spam.
> 
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