Can you move the email from one folder to another?
If so then make a new folder and move the email into that folder.
The open your users\mylan\mail folder.
You may have other folders in the users\mylan\mail folder too that was added by you.
But you can delete all the files for the folders.
Like your inbox folder is "inbox.smn".
All the SMN Files can be deleted.
Do this with Netscape close and the next time you open up your email you will see the message there and the count on the number of message will show a ??? but once you click in that folder it will make a new .smn file and log all the email that's in that folder.
Back up your user folder so you can get things back if you delete the wrong files but like I said you can delete all the .smn file types.
Great help here too.
NETSCAPE SOLUTIONS
http://home.att.net/~cherokee67/index6.html
http://home.att.net/~mojol/index2.html