SSPI authentication attempt from xxx.xxx.xxx.xxx has failed with error 0x80090308.

I have a Blackberry PDA user connecting to our email server via POP3.  All off the sudden were are getting the following in the server's event log "SSPI authentication attempt from xxx.xxx.xxx.xxx has failed with error 0x80090308".  The Blackberry can no longer send or receive emails.  I have restarted the POP3 service but it still doesn't work.  Any ideas what went wrong?  Thanks.
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innotionentAsked:
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ach_patilCommented:
This error usualy occurs on aa SQL Server. Please check your SQL Server settings on the Blackberry Server.

Refer to these links
http://www.dbforums.com/showthread.php?t=1614848
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1202665&SiteID=1

Hope this helps
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innotionentAuthor Commented:
Not sure how this applies to a SQL server problem?  Just a Blackberry phone trying to login via POP3. I dont think SQL is tied into that process.

Event Type:      Error
Event Source:      POP3SVC
Event Category:      Authentication
Event ID:      1069
Date:            8/11/2008
Time:            1:05:03 PM
User:            N/A
Computer:      XXXXXXXX
Description:
SSPI authentication attempt from xxx.xxx.xxx.xxx has failed with error 0x80090308.

For more information, click http://www.microsoft.com/contentredirect.asp.
Data:
0000: a9 04 4b 00               ©.K.    
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innotionentAuthor Commented:
Removed the mail settings on the phone and re-added them.  Works like a charm now.
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