[Exim] Message looping detected

Hi all (Hi Max)

I received this message back from a client, anyone
have any ideas what is wrong?

This report relates to your message: Subject: C206 TCL,
  To: theuser@???
theuser@???
Your message was not delivered to   theuser@???
        for the following reason:
        Message looping detected (please contact local administrator)
        This Message has travelled a long time, there are too many
        Trace hops 31 

***** The following information is directed towards the local administrator
***** and is not intended for the end user
* 
* DR generated by: mta c2bapps1-hme1
*         in /ADMD= /C=WW/ at Thu, 10 Aug 2000 16:22:47 +0100
*
* Converted to RFC 822 at c2bapps1.btconnect.com
*         at Thu, 10 Aug 2000 16:22:51 +0100
*
* Delivery Report Contents:
*
* Subject-Submission-Identifier: [/ADMD=
/C=WW/;c2bapps1.b:106280:20000810152246]
* Content-Identifier: C206 TCL
* Original-Encoded-Information-Types: ia5-text
* Content-Correlator: Subject: C206 TCL,
*                   To: "theuser@???"
theuser@???* Recipient-Info:
theuser@???,
*         /RFC-822=cscompass(a)btconnect.co.uk/ADMD= /C=WW/;
*         FAILURE reason Unable-To-Transfer (1);
*         diagnostic Loop-Detected (3);
*         supplementary info "This Message has travelled a long time,
*         there are too many Trace hops 31";
****** End of administration information 

Ken.