As far as I can tell DKIM is just a cryptographically secure way of telling a mail server that you're honestly repesenting yourself as a spammer.

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@craigmaloney I still haven't worked up courage to go into my postfix/amavisd/whatever guts and unteach him to take DKIMs seriously.

As far as I can tell, the way it's supposed to work is I should contact the mail provider of a spammer so they take action. Which never works because if the provider is big enough (cough, gmail, cough) they simply ignore all this stuff unless it's coming from somewhere equally big.

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