![]() ![]() ![]() For example if we know that the user is a spammer, we can reject the message as soon as the 'mail from:' SMTP command is sent. If it is possible to determine that the message is spam at this stage, we are able to keep the message off our systems with the least amount of our own resources. (I'm not going to try to convince you that spam is not good, you can check out some of the anti-spam resources listed in the relevant links section below, if you're interested.) Fortunately, we have many points along the network at which we can implement spam filtering, particularly:Īs the e-mail message is received by our SMTP daemon (Postfix, Qmail, Sendmail, etc) we have our earliest chance to reject the offending message. ![]() It requires that we weed through unwanted messages to find the ones that we requested. Spam takes up our network, disk, and cpu resources. Introduction: An Overview of Server Solutions for Spam Reduction ![]()
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