SMTP Failure 421

[Davids38]

When attempting to send a fax from a users desktop, we are getting a failure. I've pasted the CPTrace file.
Anyone have any ideas what is wrong? In the number that is being dialed, our phone procedures requires a long distance code, thus the ,,000000 at the end.
08:24:57:051 - CallPilot 4.04.04.18, Copyright 1999-2006 Nortel
08:25:50:777 - mm_notify <Timeout in 18 minutes> <0>
08:27:34:407 - CFaxListCtrl::MergeFaxFiles(): lpszFaxFile == NULL
08:27:34:417 - CFaxListCtrl::MergeFaxFiles(): Number files = 1
08:27:34:518 - CNdaFxSrvApp::InitInstance(): Command line - "C:\Program Files\Nortel\CallPilot\fax\nmquick.exe" "C:\Program Files\Nortel\CallPilot\fax\Fabf2a5a.TIF" "Microsoft Word - Document1"
08:27:34:838 - Application Mode
08:27:34:848 - Command Line Mode == 0
08:27:34:868 - CIMAPServer:oLogon IMAP connection opened
08:27:34:878 - nmcred: <129, 10.10.10.5> ref'd 3
08:27:34:888 - CreateFaxAddress()
08:27:34:898 - FAX=9,12625210000,,000000@MyBCM.localdomain
08:27:34:908 - SendSMTPMessage()::start
08:27:34:918 - CSMTPServer:oLogon opening SMTP connection
08:27:34:938 - mm_log <Trying IP address [10.10.10.5]> <0>
08:27:34:958 - CSMTPServer:oLogon SMTP connection opened
08:27:34:968 - nmcred: <129, 10.10.10.5> ref'd 2
08:27:34:978 - CSMTPMessage::CSMTPMessage FROM <129@MyBCM.localdomain>
08:27:34:988 - CSMTPMessage::AddRecipients TO <<FAX=9P12625210000PP000000@myBCM.localdomain>>
08:27:34:998 - CSMTPMessage::StreamFile sending MAIL command.
08:27:35:008 - CSMTPMessage::StreamFile negotiating recipients.
08:27:35:018 - CSMTPMessage::StreamFile sending DATA command.
08:27:45:037 - CSMTPMessage::StreamFile sending data.
08:27:51:082 - mm_notify <Timeout in 16 minutes> <0>
08:28:00:040 - CSMTPMessage::StreamFile send completion
08:28:45:019 - mm_log <Winsock cleanup> <0>
08:28:45:029 - CSMTPServer::Send SMTP Failure <421>
08:28:45:039 - Send message::UnknownFailure
08:28:45:079 - SendSMTPMessage()::end
08:28:45:089 - CSMTPServer::Send SMTP connection closed
08:28:45:099 - nmcred: <129, 10.10.10.5> released 1
08:28:50:714 - CIMAPServer:ing IDLE
08:28:51:725 - mm_notify <Timeout in 30 minutes> <0>