In my Gmail account, I use "Refresh POP accounts" by Emmanuel P to add a simple button at the top of my email list to quickly refresh all the POP email accounts I have attached to my Gmail account.
I cannot, for the life of me, find a method to do this on my LG Optimus. Is something like this available for Android?
Update
I use the official Google Gmail app. Gmail automatically checks pop accounts, but does not check the accounts on a regular schedule. The POP accounts can be checked manually via "Refresh POP accounts" Labs plugin in desktop browswers. However, this is not available in the Gmail app or in mobile browsers.