Geert Hendrickx:
> On Thu, Jan 29, 2009 at 12:22:13PM +0100, mouss wrote:
> > Jan 29 00:38:17 imlil postmx/smtpd[26222]: NOQUEUE: reject: RCPT from
> > unknown[147.203.208.166]: 550 5.7.1 Client host rejected: cannot find
> > your hostname, [147.203.208.166];
> > from=<3ff.4.69709687-17084...@cherryimprovise.com> to=<mo...@netoyen.net>
> > proto=ESMTP helo=<redirector-vm01-evip-aol.CherryImprovise.com>
> >
> > => as you can see, reject_unknown_client rejects this even if it has a
> > PTR.
>
>
> In legitimate cases, I've experienced that this response ("cannot find your
> hostname", which is the same response as if there was no PTR at all) can be
> confusing for the administrator on the client side. Perhaps something like
> "your reverse hostname doesn't match your IP" would be more informative (so
> they don't have to contact us to ask what it means) ?
Postfix does not write error messages to the SMTP CLIENT.
Instead, Postfix writes error messages to the LOGFILE.
Wietse
