A specific failure of domain blocking
20-Apr-2023 I blocked domain freundie.de
23-Apr-2023 freundie.de is still listed in my blocked domains (as one might expect)
however between blocking the domain and now I have received spam from each of these four spam addresses:
activate@freundie.de
notifications+t-54522101-11e903@freundie.de
notifications+t-54522365-c043fa@freundie.de
notifications+t-54550337-53bb72@freundie.de
(as one would definitely not expect)
[Yes, I track this *%1t now.]
Please extract digits and make sure your code is actually effective.
In passing, the amount of spam since 24-Feb-2022 does tell you one certain thing about AI. It doesn't yet work at even a basic level of logic. If it did there would be no spam.
UPDATE 26-April-2023 I'm withdrawing this. It's more likely I forgot to remove the individual addresses after blocking the domain. This is VERY useful functionality that yahoo provide THANK YOU..

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Nigel Moore commented
Update - probably my mistake and not yahoo's.