RE: Reverse DNS Lookup

  • From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Fri, 27 Feb 2004 09:13:56 -0600

Hi Abdul,

I'm not John or Mark, but I don't find reverse DNS lookups to be of any
value at all. The only thing good about them is that they're nowhere
near as malicious as RBLs.


Thomas W Shinder
ISA 2004 Beta - Get it now!
ISA Server and Beyond:
Configuring ISA Server:


-----Original Message-----
From: Abdul Basit [mailto:binfo@xxxxxxxx] 
Sent: Friday, February 27, 2004 1:47 AM
To: [ExchangeList]
Subject: [exchangelist] Reverse DNS Lookup

Hi All,

I want to ask you people speciall Mark Fugatt that what do you have
opinion about Reverse DNS lookup option in exchange 2000. As i have
enabled this option last week to check the ratio of spams.

I found good results but recieved calls from diffrent companies that
can't send us emails and their revers dns lookup entry is not yet setup
with their ISP.

So, I have to disabled it again.

What you people have advice for it.

Any help will be appreciateable.




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