Help app for email

[dverbi]

I used to have a blackberry curve and when i got email i was given the choice to delete i on my handheld, computer or both. I can't do that on my thunderbolt. When I delete the email it deletes on all devices. Is there an app that will let me chose? Thanks

 

[lamoglinsgal]

K-9. It's free in the market and has the option to keep messages on the server.