Programs which send out 
mass mailings can determine if an email address is 
worth their resources to send unsolicited email to, 
based on custom variables.<br><br>

For the consumer, those that run spam filters, 
frequently unsubscribe from emails and never go to the 
sites promoted in the emails will be less likely to get 
mailed, and those that are bad about getting rid of 
spam, or frequently purchase from spam will get more 
email. It allows for targeted mailings for the spammer, 
and less email for those that are zealous in keeping 
their inbox pure.<br><br>

The benefit for the spammer is for the usage of fewer 
resourced.<br><br>

The benefit for the person hosting this site is that every 
time someone verifies an address, it adds it to their 
database. They can then sell lists of email addresses 
without having to harvest them. Email addresses with 
better statistics can be sold for more.<br><br>

The benefit for the end user is that if they are 
successful in avoiding spam, they won't get spam from 
those spammers using this program to verify 
addresses.<br><br>

I will be posting the mySQL table format soon.