Yep, that's me!

You may want to add a keyword check if the spammer starts sending you back bounces:

https://spa.mnesty.com/conversations/bkpeczav/

Good idea, added, thank you.

Nice idea, kudos! One curiosity though: I read a thread from the ones listed on the homepage and the signature of the Spamnesty emails said Mnesty LLC. If that's constant in every message the service sends out, wouldn't it be quite easy for the spammers to filter them out? Wouldn't you rather randomise sender details, including the signature?

Thanks! There's only one sending domain, so it would be incongruous to randomize the signature, unfortunately...