Now I have to hunt down individual email addresses and tag them Do Not Send. Very inefficient and cumbersome. Let assume I have a competitor with the email domain "@competitor.com". All I should need to do is to go to my blocked domains and add in "@competitor.com" and no emails would ever be sent to them. Whether it's jill@competitor.com or jeff@competitor.com, it doesn't matter. People can lie about almost any of their information and there is no way to tell one way or the other. The email address is the only nugget of truth. I've even sent campaigns where I purposefully disregard "@gmail.com" addresses (or the like) because that's often a way competitors disguise themselves. Email domain blocking functionality is a must.
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