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Why would it be less of a factor? These things don't prevent spam. I can create a proper mail server with all these and send billion messages from it wherever I
by megous 6y ago
Why would it be less of a factor? These things don't prevent spam. I can create a proper mail server with all these and send billion messages from it wherever I like. These technologies prevent various kinds of forgeries.
Quick look at my archive, of 37k spams only 7k fails SPF. (I accept all email no matter what.) So it's some signal, but not nearly enough.
- habibur 6y agoSPF will pass if there is no SPF record in the domain. Which most probably is the case for most. Look for DKIM. Either it's signed and pass. Or spam if DKIM is missing. You can filter a lot more this way.
- account42 5y ago> These technologies prevent various kinds of forgeries. Preventing forgeries is what allows the trust to be based on the domain/address rather than the IP.