Botnets! Seek and destroy!

I have just had over 11, 200 emails delivered.  Sadly they were all NDRs [1].

Sadly some flaming idiot in Poland, has been sending out emails claiming to be me.
I have looked at the message headers for a few of them, they all came from different servers, different providers.

Now, I wonder if there is an MTA addon that checks the message headers as they come in, especially if the message looks like an NDR, and if the message didn’t originate from one of my known IPs (SPF records perhaps) then reject the message, or pass it to SpamAssassin, or the likes. Any ideas?
[1] NDR – Non-Delivery Report