I have a user with a Blackberry problem. They can send email to anyone except there own domain from there blackberry. Outlook and webmail works just fine.

----delivery status----
<div class="moz-text-flowed" style="font-family: -moz-fixed">Final-Recipient: rfc822;[EMAIL PROTECTED] (this is fake on here)
Action: failed
Status: 5.0.0 (permanent failure)
Remote-MTA: dns; [mail server IP]
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 571-'sorry, sender address has invalid format (#5.7.1 - chkuser)' (delivery attempts: 0)
Reporting-MTA: dns; smtp03.bis.na.blackberry.com

</div>

I was wondering if it has anything to do with the rfc822; in front of the email address.

Jeremy

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