Re: Disable from=<> - ReadList.com

6 msg	One domain, one user account - aliases

Disable from=<>
\ Alex Molchanov (14 Nov 2007)
. \ Reinaldo Carvalho (14 Nov 2007)
. . \ Michael Tokarev (14 Nov 2007)
. \ g.digiambelardini (14 Nov 2007)
. \ Magnus Bäck (14 Nov 2007)
. \ mouss (14 Nov 2007)

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Subject:	Re: Disable from=<>
Group:	Postfix-users
From:	mouss
Date:	14 Nov 2007

Alex Molchanov wrote:
> Hello,
>
> Can I disable senders messages like this
>
> (19804-05) Passed CLEAN, [10.10.10.10] <> -> <hugh>,
>

The NULL envelope sender is a legitimate address and must not be
blocked. See
http://www.rfc-ignorant.org/policy-dsn.php

You need to check your logs to find why the bounce was sent.

You must implement recipient validation correctly. mail to invalid
recipients must be rejected at the edge of your network: It must be
rejected at SMTP time when the client is not yours. Please read the
BACKSCATTER README.

>
> mail:/# postconf | grep smtpd_sender_restrictions
> smtpd_sender_restrictions = reject_unknown_sender_domain
>

reject_unknown_mumble are related to DNS. Consult
http://www.postfix.org/postconf.5.html
for the meaning and use of postfix parameters.

> Thanks for help.
>
> P.S. Sorry for my englisg ;)
>
>
>