Sending spam ?

[jpetley]

Hi,

I have started to get undeliverable notices from one of my domains. Strange considering that i only have a single catchall which is downloaded to my exchange server.
My exchange server handles several domains and this one isnt the default, so i dont think it comes from my exchange server.

The reply email address is not one that i have set up, or even exists.

How can i get around this ? I am afraid that one of our domains is somehow mass mailing the world.

Thanks,

Jason

 

[Stephen]

A couple of things, one is that it could be a joe job, another is that is you have two MX records spammers by be going to the most non priority first as a way to bypass spam filters.