Undeliverable messages I did not send!! 2

[SmokinRR]

Okay, so in the last week and a half, myself and a couple other users have started receiving undeliverable message reports regarding messages that were not sent by us. My first thought was relaying, so I verified that we were not open to relay, and I read through the headers. The emails are not generated from our server or one that even remotely resembles the name of it. The only tie I can see is that the From: address is myname@mydomain.com but the message originates from random domain names and never touches my server until the undeliverable message is sent to myname@mydomain.com (my email is actually firstname.lastname@mydomain.com and I have an alias setup as firstname@mydomain.com and that's the address it's being sent to.)

My question is, is there anything I can do to stop this? Also, will having my address spoofed into the from field cause my domain to be blacklisted or do the blacklists look at the servers the email is originating from?

Any help will be greatly appreciated.

Thanks

Jay

 

[Davetoo]

Someone has spoofed your email address and is using it to send their spam, etc.

Blacklists are generated against the source server, not the email address.

Unfortunately, there's nothing you can do about being spoofed but delete the emails sent back to you.

Another case of auto-replys to the Internet making it harder for the rest of us.

I'm Certifiable, not certified.
It just means my answers are from experience, not a book.

 

[SmokinRR]

Thanks Lander215, that's pretty much what I figured, I guess I was just hoping there was a way to put an end to it.

Thanks

Jay

 

[swabs]

If you enable message tracking in exchange you can take a look at the origin IP of the message. If you perform NSlookups on that ip you will find that many times these undeliverable reports are not who they say they are from and it is another way to spread viruses.