Why don spam filters always work?
Spammers, especially porn site spammers, are notorious for changing locations, subject lines and email addresses, which makes blocking or filtering difficult. Once you put a block in place, they just change the element that you’re blocking. They also ignore all attempts to stop their mail or to “unsubscribe” from lists that they add you to. You can help to train our spam filtering software by forwarding as attachments spam email messages you receive to is.spam@nyu.edu. (In order for the training to work, spam emails must be forwarded as attachments, not as inline text.) For more information about the spam filter, see the Spam Filtering at NYU page.
