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    Filter on mail server in chain

    i wonder if it is possible to filter a mail server in the chain? The last one typically is my provider. But i want to filter on the first one. Concrete - exchangelab.com and outlook.com. Both started to send a large amount of spam after i activated my microsoft 365.
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    utf-8 / base 64 encoded subject

    i get a lot of SPAM with same words in subject. So i wrote a rule that is blocking them. It looks like the rule will not act on utf-8 / base 64 encoded subject? Is this by design or can i change this?
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    Blocking Mail with specific alias part in from

    Hello, i want to block all emails from "Dr. med. Frank" <info@happynonsense.com> where the part between < .... > can be anything. So i wrote a regex in the global blacklist looking like this: ^\"Dr\.\smed\.\sFrank\" As far as i could test with regex101.com the expression should be exact...