I have accidentally deleted my mails in gmail trash folder. How can I retrieve those emails ? I hope I can get a solution for the terrible mistake I made.
Thanks

I doubt very much that you can... however contact them (http://mail.google.com/support/bin/request.py?contact=1&ctx=contact-us) IMMEDIATELY for the very very slight chance that they can restore them in your account.

If they were on your local computer there are a variety of apps that specialize in this sort of recovery, but being that the emails are located somewhere else, you're probably out of luck.

Sorry to be the bearer of bad news...