Configuration of filtering spam by Using Active Directory

This article mainly introducesLfHow to use anti-spam systemActive DirectoryFilter configurations. The specific content is as follows.

Some email systems (such as exchange2000) cannot directly reject emails from invalid recipients in smtp sessions. Instead, the system first accepts the emails and sends an NDR to the original recipients, the vast majority of spam senders and domain names are false, resulting in the accumulation of a large number of NDR in the sending queue, affecting normal mail sending, and even leading to a decline in system performance. Another problem is that, because of sending a large amount of junk NDR, your server is blacklisted by overseas anti-spam emails, and your normal emails cannot be sent abroad.

In an smtp session, the open-ended mail system can determine whether the recipient is valid. If the recipient does not exist, the system sends a denial command directly in the smtp session. When the sender server receives the deny command, the system automatically sends the NDR command to the original sender, the ultimate goal is to assign NDR tasks to the sender server.

(1) Enable Active Directory in management tools

(2) Go to Active Directory settings,

(3) generally, you do not need to modify the settings of Active Directory. You can also modify the settings based on your actual needs.

(4) configure the denial information in the smtp session

(5) test: send an email to a fake email address.

It is hoped that this article will be helpful to readers for how to use the Active Directory filtering configuration method.