Overview This article addresses the issue of internal emails getting flagged as inbound and blocked by the Anti-Spoofing spam filter. Note that the Anti-Spam module is designed to only listen to and s...
Overview 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 l...
Overview Some spammers fake the 'FROM:' email address and change this to the same domain as the recipient to make it appear as if the email is coming from a local user. Such emails with forged sender ...
Overview The Anti-Spoofing filter checks emails received with a sender email address claiming to originate from your own domain against a list of IP addresses known by MailEssentials. If the sender IP...
Overview Internal emails are marked as spoofed in an Exchange and 0ffice 365 hybrid environment. Antispoofing logs consistently show that emails originating from these IP's are considered spoofed: 202...
