Remember when you were at school you were always scared of getting your name into the teacher's bad book?

Well, bad books still exist and even more so in email marketing in the form of 'Blacklists'

A Blacklist is basically a list containing the IP address and domain names of flagged off spammers and potential spam email senders. This happens when a receiver or a group of receivers mark emails from a certain IP address or domain as spam. The viability of such a list is high as major internet service providers and mail box service providers take it seriously. They either block emails from a listed IP address or a domain or they mark them as spam.

Being an email marketer you run a chance to end up in this list with even the minute error.