Authentication failed

[geoff hughes net]

I'm having difficulty sending mail from my Linux (Fedora 17) box via my ISP. I can send mail from my ISP's web mail interface (witness this) but not from Balsa on the Fedora box.  Here's the debug output. Can someone please enlighten me as to where the "Authentication failed" is being generated?  Thanks.

Send_Message: 139893728616880, 1, Connected to MTA
S: 220 smtp.b.hostedemail.com ESMTP
C: EHLO puget.mtranch.com
S: 250-omf08.b.hostedemail.com
250-PIPELINING
250-SIZE 36700160
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
C: AUTH (details hidden)
S: 535 5.7.8 Error: authentication failed: Authentication failed
C: AUTH LOGIN Z2VvZmZAaHVnaGVzLm5ldA==
S: 334 UGFzc3dvcmQ6
C: bXRyYW5jaA==
S: 535 5.7.8 Error: authentication failed: 
C: MAIL FROM:<geoff hughes net> SIZE=1024
Auto-checked for new messages...
S: 250 2.1.0 Ok
C: RCPT TO:<geoff hughes net>
Send_Message: 139893728624656, 1, From: 250 <geoff hughes net>
S: 554 5.7.1 <geoff hughes net>: Recipient address rejected: Access denied
C: QUIT
Send_Message: 139893728624544, 1, To: 554 <geoff hughes net>
S: 221 2.0.0 Bye
Send_Message: 139893728619008, 1, Disconnected
Send_Message: 139893728628400, 4, 
balsa_app: Finished cleaning up.

FWIW, the message appears only briefly in /var/spool/mqueue