mozilla mail

[Mark Grieveson <dg135@torfree.net>]

Hello.  Clamscan, of clamav, indicates that there is a virus in my 
mozilla mail inbox file.  I emptied and deleted all the mail in the 
inbox, yet, there is still a 5 MB file there, which seems to be a large 
text file containing records of all the past mail received.  Should I 
delete this file?
The readout from clamscan is:

debian:/home/mark/.mozilla/default/fmjrfclp.slt/Mail/pop.torfree-1.net# 
clamscan
/home/mark/.mozilla/default/fmjrfclp.slt/Mail/pop.torfree-1.net/Inbox: 
HTML.Phishing.Pay-87 FOUND

Mark