Dear all,
   I recognize that mailman can accept a fake sender . Example, I have a 
maillist with only an email account (x...@abc.com) can send messages to all 
emails in the list. But , if someone can send a fake "From address" is 
x...@abc.com, mailman will delivery messages to the list . This is a security 
problem. Can we prevent this from happening  ? 
  Best regards,
  Huu Hien
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