OSEC

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Re: [Old box, Newbie] Undelivered Mail Returned to Sender

From: Wietse Venema (wietseporcupine.org)
Date: Wed Dec 12 2007 - 15:34:11 CST


Paul Rogers:
> --- Wietse Venema <wietseporcupine.org> wrote:
> > That IS NOT what the manual says.
>
> In an effort to eliminate misunderstandings, this is the content of
> master.cf that produced the most recent bounce.
...
> smtp inet n - n - - smtpd

With this, we have established that chroot is turned off.

If DNS lookups by hand produce results that don't jive with Postfix,
then testing the DNS as an unprivileged (*) user may be illustrative.

        Wietse

(*) Output from the "id" command shows no "zero" uid or groups.