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"No Relaying Allowed"

Posted on 2004-03-23
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Last Modified: 2011-04-14
This is a little strange, and it worries me....
Earlier in the day I received an email from an aquantennance, along with about 10 other recipients.....No biggie, I just deleted it right away....About 2 hours later I get, in my mailbox, a "System Delivery Failure" email saying "No Relaying Allowed" from our server.....Does this mean the original email I received could have contained a virus and then tried to relay through my server?  I have relaying completely locked down on the server for this very reason.....But it scares me.  A scan of my machine comes up clean.....Any ideas?
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Question by:tenover
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by:infotrader
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This is not likely.  It is much easier for your system to deliver email through the Exchange server than running its own SMTP.  You might want to check to see if you do have SMTP turned on, if that worries you.

What is more likely is that someone is trying to send out emails to other people using your email address.  The email you received could be a result of a failed attempt from the perpetrator to relay email.

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by:tenover
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Cool, thanks.  The original email was to me and about 10 other people.  The second "System Delivery..." email had the sam subject as the one sent to me originally, and the "recipient" was some "noreplyy@...." address that I never sent anything too.  It's almost like I forwarded this email to that addres, except I didn't.  I have the server set to not relay anything, it just worries me...
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infotrader earned 500 total points
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The computer you should worry about should be your friend's computer that sent the email, not you.

Chances are, HE/SHE is infected with a worm or trojan, and starting to send out email AS anybody on the address book.

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by:tenover
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Ahhh.....gotcha.  Thanks. So if he has a virus that's doing this, it searched his address book, found my address, sent out an email as "me" and I (the REAL me) got the NDR....Thanks.
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