Re: postfix open relay - Please help.

From: Kai Fürstenberg (no email)
Date: Thu Feb 01 2007 - 03:47:37 EST

  • Next message: Eray Aslan: "Re: Invalid address and bounce from Exchange"

    Noel Jones schrieb:
    > At 11:53 PM 1/30/2007, Kai Fürstenberg wrote:
    >> I think the problem is the order of the restrictions:
    >> The first is smtpd_client_restrictions. You have set a permit there.
    >> If the client is not rejected in /etc/postfix/access, he will be able
    >> to relay mail and it doesn't matter what you configurered later, just
    >> because of the "permit". The second is smtpd_helo_restrictions, but
    >> you haven't set. Third is smtpd_sender_restriction. You have another
    >> permit here. And last is smtpd_recipient_restrictions. Here you have
    >> reject_unauth_destination which is never reached, because of the
    >> several permits before.
    >
    > Ignore this incorrect advice.
    Please explain.
    As I understand the documentation, if you set "permit" somewhere in the
    restrictions, the mail is accepted. So if you set
    smtpd_client_restrictions just to "permit", postfix will accept all
    mails, also foreign mail.

    > We have still seen no evidence that Sam's system is an open relay, and
    > I doubt that it is.
    I agree if you take the output of postconf -n from the previous postings.

    Kai


  • Next message: Eray Aslan: "Re: Invalid address and bounce from Exchange"





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