Gmail’s IMAP feature is the answer!

Tired of having to mark emails as “read” on your laptop, only to have to mark them as “read” on your mobile phone? From now, you can keep your accounts sync’ed up across your desktop, laptop, mobile phone, or any other device that you use to access Gmail

Any changes, like reading, deleting, sorting, email folder structure, etc., across all your devices will appear in your desktop email client as well as your web-based Gmail account.

In settings tab, You should see the IMAP feature under the “Forwarding and POP/IMAP” section...

Awsome ! :)