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Re:How to prevent email spoofing, using an unholy combinatio... by inopinatus on Monday August 16, 2021 @04:32AM (#28196071)
It’s not trivial, but it’s definitely something I’d expect to be within the grasp of most visitors to this forum.

Importantly you can also verify the correctness of the configuration, which isn’t the case for all anti-spam and anti-spoofing measures.

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