Old 14th July 2009, 22:07
Rixcz Rixcz is offline
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Default postfix resolve problem

Hi, If I want sent mail on someone server, I recieved this:


This is the mail system at host rxx.cz.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<fixxt@xx.cz>: host mail.xxx.cz[194.x.x.x] said: 501 5.7.1
<dxxa@xxx.cz>... Sender IP must resolve (in reply to MAIL FROM


Received: from dilna (ip-85-1xxl.cz [85.160.78.xxx])
by r01.rhost.cz (Postfix) with ESMTP id AA23C2144056;
Mon, 13 Jul 2009 15:04:53 +0200 (CEST)
Message-ID: <001201xx27a60a@xxa>
From: "dilna" <dixxa@xx.cz>
To: <fiat@axxxa.cz>
Cc: <exxan@sxxm.cz>
Subject: =?iso-8859-1?Q?Duc=E1to?=
Date: Mon, 13 Jul 2009 15:04:47 +0200
MIME-Version: 1.0
Content-Type: multipart/mixed;
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2800.1106
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106
X-Antivirus: avast! (VPS 090712-0, 12.07.2009), Outbound message
X-Antivirus-Status: Clean


ps: I use ISPconfig 2

Any idea? thx

Last edited by Rixcz; 30th March 2010 at 22:46.
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Old 15th July 2009, 01:28
abix_adamj abix_adamj is offline
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Change Reverese DNS for your Server to something, which looks like a server.

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