I’ve been doing more work on my outbound spam filter lately. I’m good at catching a hacked account but it was taking me 3 minutes to figure out that the account was hacked. This allowed the spammer to get a few thousand outbound spams off and that wasn’t good enough. But when you first see [...]

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I have made a LOT of progress recently filtering outgoing spam. Outgoing spam filtering is very different than incoming spam and requires a new strategy. But I’ve figured out a few easy rules that seem to work very well. As you all know I prefer behavior based rules rather than content based rules (like SpamAssassin). [...]

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