RE: RDNS: Reject on fail l

  • From: "John Tolmachoff \(Lists\)" <johnlist@xxxxxxxxxxxxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Thu, 6 May 2004 11:35:37 -0700

You said pretty much. What about the new client you just got and the boss is
waiting for an e-mail from them, but they are a small shop and do not have
their server setup completely right, and your boss is wondering why he has
not gotten the e-mail from them yet, and calls them, and they say they sent
it but it bounced back as undeliverable.

 

Oh, BTW, 90% of the spam being sent through zombies does indeed have a PTR
record, because the ISP has a generic on there.

 

So, in conclusion, testing for a PTR record is not worthy of blocking the
receipt, however it is good in a weighted system.

 

John Tolmachoff

Engineer/Consultant/Owner

eServices For You

 

-----Original Message-----
From: Jason Merrique [mailto:j.merrique@xxxxxxxxxxxxxxx] 
Sent: Thursday, May 06, 2004 11:29 AM
To: [ExchangeList]
Subject: [exchangelist] RE: RDNS: Reject on fail l

 

http://www.MSExchange.org/

Hi John,

 

Not doing something because a company we hate does it, isn't a particularly
good reason. I've noticed that most of the spam we receive fails an RDNS
lookup, and pretty much all the legitimate email we receive passes.

 

Is it possible?

 

Cheers,

 

Jason

 


  _____  


From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] 
Sent: 06 May 2004 16:26
To: [ExchangeList]
Subject: [exchangelist] RE: RDNS: Reject on fail l

http://www.MSExchange.org/

Not practical or wise to do that.

 

AOL, who acts like a God, does this. All the rest of us mail server admins
hate AOL.

 

If everyone played by the books, yes, that would be fine.

 

John Tolmachoff

Engineer/Consultant/Owner

eServices For You

 

-----Original Message-----
From: Jason Merrique [mailto:j.merrique@xxxxxxxxxxxxxxx] 
Sent: Thursday, May 06, 2004 5:07 AM
To: [ExchangeList]
Subject: [exchangelist] RDNS: Reject on fai l

 

http://www.MSExchange.org/

Hi All,

 

I'd like to configure our mail server to reject email that fails an RDNS
check. We're running Exchange 2003. Is this possible without a third party
program? I've found the option to "Perform reverse DNS lookup on incoming
messages", but not the one to reject messages that fail it.

 

Any ideas?

 

Cheers,

 

Jason

------------------------------------------------------
List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist
Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp
Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ
------------------------------------------------------
Other Internet Software Marketing Sites:
Leading Network Software Directory: http://www.serverfiles.com
No.1 ISA Server Resource Site: http://www.isaserver.org
Windows Security Resource Site: http://www.windowsecurity.com/
Network Security Library: http://www.secinf.net/
Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com
------------------------------------------------------ 

------------------------------------------------------
List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist
Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp
Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ
------------------------------------------------------
Other Internet Software Marketing Sites:
Leading Network Software Directory: http://www.serverfiles.com
No.1 ISA Server Resource Site: http://www.isaserver.org
Windows Security Resource Site: http://www.windowsecurity.com/
Network Security Library: http://www.secinf.net/
Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com
------------------------------------------------------ 

------------------------------------------------------
List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist
Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp
Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ
------------------------------------------------------
Other Internet Software Marketing Sites:
Leading Network Software Directory: http://www.serverfiles.com
No.1 ISA Server Resource Site: http://www.isaserver.org
Windows Security Resource Site: http://www.windowsecurity.com/
Network Security Library: http://www.secinf.net/
Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com
------------------------------------------------------ 

Other related posts: