[imp] imp filter problem or profile corruption ?

[Swenson, Chris]

I have one student out of 5000 who receives some emails from some people that seem to be
going directly into his trash folder.
He claims not to have set up filters, I have asked him to come to my office to
verify, but I do believe him.  I do not think he is capable of such advanced config changes ;-].
He has not even created any folders in his directory. (Nor does he really have much email in his box as a whole)

If his profile is corrupt, is there a way to clean that up?
If I remember correctly the user info is stored in the mysql.

I have an older server running RHEL 3 patched up to date.
I expect to replace it this summer.
Sorry if this is too much info.

Horde: 2.2.5
IMP: 3.2.5
Passwd: 2.2.1
Turba: 1.2.2
PHP 4.3.2
DOM XML Support: Yes
FTP Support: Yes
Gettext Support: Yes
IMAP Support: Yes
LDAP Support: Yes
MCAL Support: No
Mcrypt Support: No
MySQL Support: Yes
PostgreSQL Support: No
XML Support: Yes
Miscellaneous PHP Settings
magic_quotes_runtime disabled: Yes
file_uploads enabled: Yes
safe_mode disabled: Yes
trans_sid disabled: Yes

PEAR
PEAR - Yes
Recent PEAR - Yes
Mail - Yes
Log - Yes
DB - Yes
Net_Socket - Yes
Date - Yes
HTML_Common/HTML_Select - Yes