How to Block helo command to send a Spoof mails (Network Steve Forum)

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How to Block helo command to send a Spoof mails

On Mon, 9 Apr 2012 17:39:10 +0000, Balwan Singh wrote:

>In my environment if I try to telnet from the internet to an exchange server on domain1.com I can send an email as anyrandomuser@domain1.com to actualuser@domain1.com. That means i can sent mails from any mail id( from my domain) to any mail id. wheather
it is internal or external
>
>Is there a way to prevent anyone from doing this.

Sure. Use SenderID.

http://www.microsoft.com/mscorp/safety/technologies/senderid/default.mspx

http://www.openspf.net

---
Rich Matheisen
MCSE+I, Exchange MVP
--- Rich Matheisen MCSE+I, Exchange MVP

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April 9th, 2012 9:27pm

Hi Experts,
In my environment if I try to telnet from the internet to an exchange server on domain1.com I can send an email as
anyrandomuser@domain1.com to
actualuser@domain1.com. That means i can sent mails from any mail id( from my domain) to any mail id. wheather it is internal or external
Is there a way to prevent anyone from doing this.
Thanks in advance
Balwan Singh

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April 27th, 2012 10:48am

What version of Exchange are you using? If it's 2007/2010 , what are the settings on the receive connector you are attaching to (Assuming it's probably default).

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April 27th, 2012 12:58pm

April 27th, 2012 2:35pm

Hi Russ,
its 2007 and receive connector setting is default.Balwan Singh

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April 27th, 2012 9:50pm

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