Re: delivery problem with empty recipient

On Mon, Jan 31, 2005 at 09:44:27AM +0100, Konrad Mauz wrote:
> Hi,
>
> i have a delivery problem with postfix since it is delivering mails with
> empty recipient to the user root. I want postfix to reject mails to
> ""@localhost and @localhost with a "user unknown " or something similar.
> Why is postfix willing to deliver mails to ""@localhost?
> How can i change this?
>
> On another host sendmail has a different way to handle empty recipients:
>
> Connected to localhost.
> Escape character is '^]'.
> 220 mailhost-a.fh-konstanz.de ESMTP
> ehlo localhost
> 250-mailhost-a.fh-konstanz.de Hello localhost [127.0.0.1], pleased to meet
> you
> 250-PIPELINING
> 250-8BITMIME
> 250-SIZE 44418873
> 250 HELP
> mail from:<>
> 250 2.1.0 <>... Sender ok
> rcpt to:<@localhost>
> 553 5.1.3 <@localhost>... User address required
> rcpt to:<""@localhost>
> 553 5.1.3 <""@localhost>... User address required
> rcpt to:<" "@localhost>
> 550 5.1.1 <" "@localhost>... User unknown
> quit
>

I checked the way exim reacts on empty localparts, same way then
sendmail does.

I found a thread on a german suse mailinglist about the same problem.
Somebody said, that postfix is rfc compliant when it receives messages
to a recipient with empty or "" localpart. If this is the case, how can
a set up an alias or whatever map entry? It does not work, cause aliases
and other maps do not allow an empty left side. And a left side "" also
does not match ( tested with aliases ).

So any ideas how to reject such mails?


With kind regards,

Konrad


--
Konrad Mauz Rechenzentrum Fachhochschule
Braunegger-Strasse 55, D 78462 Konstanz
e-mail: kmauz@fh-konstanz.de
Tel.: +49(0)7531-206-472