The email from all of my account goes to Gmail so I have to go to different sites or open and email program. I go to Gmail and it’s all there. See Lifehacker. But that’s not the tip!
Google does not check your POP account frequently so you may have your Gmail open but your not seeing all of you messages because they’re still on the server. You can go to “Settings”, “Accounts and Import”, go down to “Check mail using POP3″ and click on “Check mail now”. This will import any new messages.
This method is very inconvenient. A better way is to turn on this new feature that checks your POP accounts whenever you click the “Refresh link” just above your messages.
At the top of the Gmail page click “Settings” and “Labs”. Find “Refresh POP accounts” and enable it. Now you can check your POP accounts with ease.