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
April 10th, 2012 12:27am

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 1:48pm

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).
April 27th, 2012 3:58pm

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
Free Windows Admin Tool Kit Click here and download it now
April 27th, 2012 5:35pm

Hi Russ, its 2007 and receive connector setting is default.Balwan Singh
April 28th, 2012 12:50am

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