Shoutbox

Actually, I never seem to have that issue and I used the POP3 feature in Messenger Plus! to check my e-mail.

I use the archive my messages when they are downloaded on POP3 setting on GMail.

I also disabled the leave a copy of downloaded messages on server in my e-mail program (Microsoft Outlook).

Unfortunately, If you don't actually use POP3 to check GMail but you just use the POP3 feature in GMail so you can use the Messenger Plus! feature to check how much e-mail you have, then I can't help you with this advice.