SMTP sends Junck Mails Automatically.

[siddapur]

Dear All,
I have a problem in Win2k Professional SMTP Server.
I am using Win2k Professional SMTP as my mail server.3 days back I installed Service Pack 4 for the system. This morning when I switched on machine after some time I found that the SMTP is sending lots of junk mails on its own every few seconds. I can see these mails in the queue. If I stop the SMTP service I can clear the queue and it sends no more mails. As soon as I restart the SMTP service again it starts sending the mail. I am using AVG antivirus . It is not able to find any virus on my system. It says there is no virus on my system. What else could be the problem. Is there any patch for this?. Is it a new virus?
Note: One more thing, the address to which it sends the mail is some junk address @yahoo.com or hotmail.com etc.
The sender and recipient are same.The content is not in readable characters.

Please help me as I need SMTP for sending mails.

Thanks and Regards
Sadguru.

 

[jasonboyes]

Are you behind a router?

If not someone is probably using your server as a relay. I am not sure how to lock down the SMTP server to not relay messages.


Jason

 

[siddapur]

NO I am not behind any router. Also I am using outpost firewall. It is not showing any intrusion. Now there are no mails in the queue since last 2-3 hours even if SMTP is running. I am not understanding what exactly is happening.

Thanks.

 

[jasonboyes]

Try this article

http://support.microsoft.com/default.aspx?scid=kb;EN-US;310356

Jason

Rich Cook -- "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."

 

[Accessdabbler]

I'm just learning about this stuff but you probably have SMTP relay turned on. You need to disable/turn off the SMTP relay feature.