How Should the Blocked Senders List be Used?
A Blocked Senders Lists are used to block legitimate but undesirable bulk email (such as newsletters, etc.) that you’ve tried to opt-out of but continue to receive regular mailings from. You may think to use Blocked Senders Lists as a way to combat the small amount of spam that makes it’s way to your inbox. In fact, Blocked Senders Lists are ineffective when used this way. Because spammers consistently change who the spam comes from (i.e. you may see a spam that comes from vaigar@userpost.isp.district.de one day and cialus2@userpost.isp.district.de the next). Both might appear to come “from” president@commnet.edu and adding the “from” of that spam to your Blocked Senders Lists will not stop future forged spam such as when they make it appear to come “from” vicepresident@commnet.edu. Spammers choose who the message appears to come from out of a hat and it’s most likely never going to be the same thing twice so blocking it is ineffective. The best method to fight that small amount of spa
