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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 metafunctor on Monday August 16, 2021 @01:24AM (#28195166)
How does it work?

Based on a cursory inspection, it looks like UniversalSPF makes use of a custom DNS server and the the %{i} and %{o} macros for SPF.

Before this, I wasn't even aware that SPF had macros!

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Re:How to prevent email spoofing, using an unholy combinatio... by hoseja on Monday August 16, 2021 @04:34AM (#28196074)
Quick, somebody prove it's Turing-complete!
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Re:How to prevent email spoofing, using an unholy combinatio... by kcolemangt on Monday August 16, 2021 @09:45AM (#28197965)
It works by inactivating spf terms that cause errors then serving out a cleaned up and compressed policy for you on the fly.
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