procmail
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filter based on "From: " content

2020-11-16 15:16:49
Recently I get lots spam mails typically with faked "From:" and "To:" like

  From: "joe(_at_)mysite(_dot_)org" <extusr(_at_)water(_dot_)ne(_dot_)jp>
  To: joe(_at_)mysite(_dot_)org

where "joe(_at_)mysite(_dot_)org" is our local user. My problem with procmailrc approach is that 'formail' extraction will largely leave out the "joe(_at_)mysite(_dot_)org" part in the "From:" line. Before I may attempt an external script to do the catch, I wonder is there already, or possibly some simple filter to catch these within procmailrc?

Zhiliang
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