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6.9

Ramdom NDRs -    There was a SMTP communication problem with the recipient's email server.

Asked by uklogistics in Exchange Email Server, Simple Mail Transfer Protocol (SMTP), Email Servers

Tags: Microsoft, Exchange, 2003, There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.

For  while now, different users around the office are ramdomly receiving bounce backs when sending emails through their Outlook 2003 client / Exchange 2003, with the error being;;

   There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.


When I check eventvwer on exchange server I find this error;


A non-delivery report with a status code of 5.5.0 was generated for recipient rfc822;acct.??@???.????.com (Message-ID <242749538A520140A585FCF03D46FCB10104F86C@??????-srv01.unsworthcl.com>).  
Cause:  This message indicates a generic protocol error (SMTP error).  For example, the remote SMTP responds to an issued EHLO with a 500 level error and the sending system will QUIT the connection and report this with NDR indicating the remote SMTP server cant handle the protocol.    
Solution:  View the SMTP log or run a netmon trace to see why the remote SMTP server rejects the protocol request.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.


I have run SMTP Diagnostics at mxtoolbox.com

RESULT: smtp1.unsworthcl.com
Banner: SMTP ESMTP [156 ms]  
Connect Time: 3.062 seconds - Good
Transaction Time: 3.812 seconds - Good
Relay Check: OK - This server is not an open relay.
Rev DNS Check: OK - 83.104.227.178 resolves to uglog2-adsl.demon.co.uk
GeoCode Info: Geocoding server is unavailable
Session Transcript: HELO please-read-policy.mxtoolbox.com
250 SMTP [141 ms]
MAIL FROM: <test@mxtoolbox.com>
250 ok [156 ms]
RCPT TO: <test@mxtoolbox.com>
553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) [141 ms]
QUIT
221 SMTP [156 ms]
 

RESULT: smtp2.unsworthcl.com
Banner: SMTP ESMTP [250 ms]  
Connect Time: 0.344 seconds - Good
Transaction Time: 8.375 seconds - Not good!
Relay Check: OK - This server is not an open relay.
Rev DNS Check: OK - 80.177.32.174 resolves to mailgate.unsworthcl.com
GeoCode Info: Geocoding server is unavailable
Session Transcript: HELO please-read-policy.mxtoolbox.com
250 SMTP [3375 ms]
MAIL FROM: <test@mxtoolbox.com>
250 ok [359 ms]
RCPT TO: <test@mxtoolbox.com>
553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1) [3766 ms]
QUIT
221 SMTP [281 ms]
 


I cannot identify problem, please help.
[+][-]06/13/08 05:22 AM, ID: 21777982Accepted Solution

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About this solution

Zones: Exchange Email Server, Simple Mail Transfer Protocol (SMTP), Email Servers
Tags: Microsoft, Exchange, 2003, There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
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Solution Provided By: bevhost
Participating Experts: 2
Solution Grade: B
 
[+][-]06/13/08 07:33 AM, ID: 21779294Author Comment

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[+][-]06/13/08 07:56 AM, ID: 21779573Assisted Solution

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[+][-]06/13/08 02:36 PM, ID: 21782984Assisted Solution

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[+][-]06/20/08 04:57 AM, ID: 21830205Author Comment

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[+][-]06/26/08 01:29 PM, ID: 21878708Author Comment

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