Hello,

When someone try to send an email to my account andy@abc.com, the following error message occur :

Your message was not delivered to the following recipients:

andy@123.com : User unknown

I have not set an forwarding in the mail account andy@abc.com to forward to andy@123.com.The sysmpton appears randomly,sometime the error message will happen and some time will not.


Any idea?




Andy

I have this excact problem on my server. Does anyone no?

Thanks,
Nathaniel

if the mails are working to say gmail or yahoo..this should be a problem with the recipient end.

Check /var/log/exim_mainlog for more information

see the problem is, that we had the server reformated in December and since then, we can not recieve emails from some people. There are getting roughly the same error. We have reinstalled the mailing service and no luck. We are using Cpanel
Here are some of the errors(i have changed the domain to mydomain)

-----Original Message-----
From: Mail Delivery System [mailto:Mailer-Daemon@llex01.uwic.ac.uk] Sent: 05 February 2007 09:04
To: Hanlon, Rebecca
Subject: Warning: message 1HCtdn-0001ze-KN delayed 72 hours

This message was created automatically by mail delivery software.
A message that you sent has not yet been delivered to one or more of its
recipients after more than 72 hours on the queue on llex01.uwic.ac.uk.

The message identifier is: 1HCtdn-0001ze-KN
The subject of the message is: Tonight
The date of the message is: Fri, 2 Feb 2007 08:19:30 -0000
The subject of the message is: Tonight

The address to which the message has not yet been delivered is:

phill@mydomain.co.uk
Delay reason: SMTP error from remote mailer after RCPT
TO:<phill@mydomain.co.uk>:
host media4creative.co.uk [85.234.157.118]: 451 Could not complete
sender verify callout

No action is required on your part. Delivery attempts will continue for
some time, and this warning may be repeated at intervals if the message
remains undelivered. Eventually the mail delivery software will give up,
and when that happens, the message will be returned to you.

Here is another message

Unknown user: nathaniel@mydomain


Original message follows.

Received: from SCI08 [10.35.74.18] by mydomain.sch.uk
(SMTPD32-7.07) id A5F0BF0278; Tue, 06 Feb 2007 09:10:08 +0000
Message-ID: <000b01c749ce$994cb420$124a230a@Stcyres.Internal>
Reply-To: "02nathanielmcinnes" <02nathanielmcinnes@mydomain.sch.uk>
From: "02nathanielmcinnes" <02nathanielmcinnes@mydomain.sch.uk>
To: <nathaniel@logikstudios.co.uk>
References: <45C79D7A.5030101@mydomain.co.uk>
Subject: Re: TEST SINCE CHANGES MADE
Date: Tue, 6 Feb 2007 09:10:08 -0000
Organization:
MIME-Version: 1.0
Content-Type: text/plain;
format=flowed;
charset="iso-8859-1";
reply-type=response
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.2869
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962


----- Original Message ----- From: <nathaniel@logikstudios.co.uk>
To: "02nathanielmcinnes" <02nathanielmcinnes@mydomain.sch.uk>
Sent: Monday, February 05, 2007 9:11 PM
Subject: TEST SINCE CHANGES MADE

What is causing this?

Thanks,
Nathaniel

By the Yahoo does work

if the mails are working to say gmail or yahoo..this should be a problem with the recipient end.

Check /var/log/exim_mainlog for more information

How do i check this?

Thanks,
Nathaniel

P.S It also looks like this only happens on windows servers.

Can people with windows servers email a message to nathaniel.logikstudios@ntlworld.com I will then give you the address i want you to email to test.

Its gone all funny again. I downloaded the /var/log/exim_mainlog and suddenly it worked. But no it has gone all funny again. I dont think it would be problems, with some of the clients we work. One of these, who is SONY. They cant send us email. They did however 2 days ago. But no we got this problem back.

I need help URGENTLY!!

Thanks,
Nathaniel

It has been fixed. If you get an Unknown user, it is something to do with the senders end. I have been on the phone to Cpanel all night about this.

Thanks,
Nathaniel