Re: Helo command rejected: unknown host reg....

From: /dev/rob0 (no email)
Date: Fri May 02 2008 - 13:31:20 EDT

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    The top-posting made this thread hard to follow. Please don't do that.

    On Fri May 2 2008 01:33:42 Anant S Athavale wrote:
    > Whenever REJECT happens, it logs the helo hostname in the logs. But,
    > when the sender is informed of this and he corrects the problem, we
    > start receiving the mails. But, I want to log the new helo hostname
    > which he would have set to solve the problem. How do I achieve it.
    > This is not be a permanent requirement.

    1. You reject using reject_unknown_helo_hostname
    2. A miracle happens, and the rejected postmaster fixes the HELO
    3. Same client reconnects and message is delivered.

    You want #3 to be noted in your logs. This is not possible natively in
    Postfix. You would have to write a policy service which would maintain
    a database of unresolvable HELO hostnames, and check new connections
    against that database.

    Regarding #2 above, it doesn't seem likely to happen in my part of the
    Internet. In fact I don't consider reject_unknown_helo_hostname safe.
    If you have a lot of leverage over your correspondents, maybe.

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