IntroductionĪnti-Spoofing is an anti-spam filter that is designed to block emails originating from spoofed addresses which are emails from one of the local domains but which were sent from an unauthorized IP address. In this article, you will learn how to determine why the Anti-Spoofing engine blocked or allowed a message as part of the troubleshooting process. If the sender IP address is not on the list of own-domain server IP addresses, the email is blocked as the sender information is forged. The Anti-Spoofing Filter is one of the filters in the Anti-Spam chain that works by checking emails received with a sender email address claiming to originate from your own domain against a list of IP addresses known by MailEssentials.
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