Locking down outbound SMTP

Posted July 30th, 2008 by Matt Shadbolt

I’ve recently had issues with my companies IP address being blacklisted by a bunch of RBL’s (Realtime Block Lists) blocking mail delivery from our server on the basis that we are sending SPAM. We of course didn’t realize there was a rouge client on our network sending bulk unsolicited emails. After weeding out the client [...]

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