David, it's so hard to tell!
If you want a big fat thing that misuses your code, try out my 
S-Postman (it's on Bitbucket and no URL from me and you need tip). 
And i could post you a small config and the EMAIL breaking patch 
for it and a 430KB TBZ archive of mail digests which contain many 
bad mails (this is why you need the postman in the end, it'll 
split the archives up for you). 
This is something you could stick around with for a while :) 
If you want all or parts of that, post and you have it tomorrow.