Some nasty person is forging my domain when sending out spam, due to the sheer volume of bounce messages I've had to set some lesser used incoming email addresses to :fail: Unfortunately, there's little I can do, the email never came from a machine under my control - it's trivially easy to fake a 'from' address. Also the the forged address varies dramatically so I can't just block that - and there doesn't seem to be anything standard in the bounce messages that I can kill.
If you're at this site as you've received said spam, my apologies - it wasn't me. Honest. While you're here, please feel free to have a look around.
Please examine the headers closely and get their real account canned!
I don't see the full headers often, as often they are cut from the bounce messages, and most of the time it's all I can do simply to seperate these bounces from the real email I'm getting.