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Google Spoofed Via DKIM Replay Attack | EasyDMARC
(easydmarc.com)
Welcome! This is a community for all those who are interested in protecting their privacy.
PS: Don't be a smartass and try to game the system, we'll know if you're breaking the rules when we see it!
Some of these are only vaguely related, but great communities.
This was an interesting read, though is also an advert for their services. Regardless, enjoyed the details.