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Re: problem getting reject_sender_login_mismatch to work

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  • Wietse Venema
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    Message 1 of 2 , Feb 22, 2010
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      Eric Haszlakiewicz:
      >
      > I'm trying to set up my mail server so it blocks emails that appears to
      > come from the same address that they are going to. i.e.
      > From: user@...
      > To: user@...
      >
      > I figured a good way to do this would be with the reject_sender_login_mismatch
      > which, according to the docs, not only prevents the above case, but can also
      > avoid any other bogus from addresses from outside my network:
      >
      > http://www.postfix.org/uce.html#smtpd_sender_restrictions
      > reject_sender_login_mismatch
      > Reject the request when $smtpd_sender_owner_maps specifies an owner for the MAIL
      > FROM address, but the client is not (SASL) logged in as that MAIL FROM address
      > owner; or when the client is (SASL) logged in, but the client login name
      > doesn't own the MAIL FROM address according to $smtpd_sender_login_maps.
      >
      >
      > Unfortunately, it doesn't seem to work as described. The
      > smtpd_sender_owner_maps setting doesn't seem to do anything. Setting it
      > doesn't cause an error, so it seems like it's a valid option. If I set
      > smtpd_sender_login_maps instead, it *does* do something, but it applies to
      > non-SASL authenticated clients, which is contrary to what the doc says.
      >
      > I managed to get it working in a way that seems to do what I need, but the
      > mismatch between the docs and the behavior makes me a bit uneasy. Is there
      > something I'm missing?

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