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A comment on How to prevent email spoofing, using an unholy combination of silly standards. Parent comment

Re:How to prevent email spoofing, using an unholy combinatio... by scandox on Sunday August 15, 2021 @05:51PM (#28192868)
You're right - they're not really hard. Dealing with their consequences can be though. The real problem is that they are tacked on solutions...and that's why you end up with things like ARC (https://en.wikipedia.org/wiki/Authenticated_Received_Chain) which as far as I can see is a way of getting around the problems that DMARC creates for so many setups.
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Re:How to prevent email spoofing, using an unholy combinatio... by marcbradshaw on Monday August 16, 2021 @03:16AM (#28195693)
ARC addresses a very specific subset of DMARC problems, and in doing so introduces another set of problems.
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