Re: problem with rejected client

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Re: problem with rejected client
\ berny (12 Jul 2007)
. \ (Wietse Venema) (12 Jul 2007)
. . \ berny (12 Jul 2007)

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Subject:	Re: problem with rejected client
Group:	Postfix-users
From:	berny
Date:	12 Jul 2007

> ------------ Původní zpráva ------------
> Od: <wietse>
> Předmět: Re: ?Q?problem=20with=20rejected=20client
> Datum: 12.7.2007 13:34:47
> ----------------------------------------
> berny:
> > hallo,
> >
> > I have configured " reject_unknown_client" in "smtpd_client_restrictions".
> >
> > I get this error from some client:
> >
> > 450 Client host rejected: cannot find your hostname
> >
> > But the IP address can be resolved to name and name can be resolved to IP
> address.
> >
> > Do you have any hint?
>
> See:
>
> http://www.postfix.org/postconf.5.html#reject_unknown_client_hostname

yes, I've seen it

> reject_unknown_client_hostname (with Postfix < 2.3: reject_unknown_client)
> Reject the request when 1) the client IP address->name mapping
> fails, 2) the name->address mapping fails, or 3) the name->address
> mapping does not match the client IP address. This is a stronger
> restriction than the reject_unknown_reverse_client_hostname
> feature, which triggers only under condition 1) above.

1) client IP address is the address of connecting MTA
the resolving the name from IP is OK
2) where postfix takes the name? form helo command?
when I resolve name in helo command it's the client IP address

This is my error message:
[ID 197553 mail.info] NOQUEUE: reject: RCPT from unknown[xx.xx.xx.xx]: 450 Client host rejected: cannot find
your hostname, [xx.xx.xx.xx]; from=<user> to=<own.user> proto=ESMTP
helo=<mail.outsider.com>

Where takes postfix name in this section from: RCPT from unknown[xx.xx.xx.xx]: ?

thx
berny