Does not get all emails Rated 3 out of 5 stars

Works relatively well. However, I notice that the button doesn't get ALL email from an account. As soon as I run the 'get Mail' button, I can immediately select the account and get TBird to get messages and TBird downloads many more emails that the button didn't get. Seems like there a time limit on how long the button accesses each account? I have 6 email accounts that I use daily and I have to manually download the emails again to get all of my messages.