It's so simple.

Mark all items as read.

I use my computer for 99.9% of emails. I have the same email boxes on my iPod. I wish I could mark messages as read, so I can tell if a new message comes in when I'm the iPod for email
Yo soy un hombre sincero de los alpes suecos. Con los pobres de la tierra, quiero yo mi suerte echar.