The program does precisely what it promises and works very well. It allows you to fight spam and create quick accounts for one-time messages (like this one).
Some people might see an evil use in this program. but from my perspective it works very well.
I do have two suggestions. First off I would like to propose a multiple-client feature. In the options menu, you can check multiple mailboxes and the program picks one at random. This spreads the server load a little, instead of using only one mailbox all the time.
Secondly, it might be interesting to add a compatibility-list. Facebook for example blocks certain addresses. If you want to use bloody viking on facebook, and you have no compatible mail clients selected (see first proposal), you get a message.
These changes will improve usability without making the system more complex.