Originally Posted by zeteo
Many people leave it open all the time. I know I do. It would seek for mail at regular intervals. As soon as it retrieved the mail, it would delete them from the server, and they wouldn't get sent to my BIS.
BTW, to confirm it is neither the BIS nor your hardware causing the problem, set up a BB mail account from BIS, if you are able to send and receive mail then you know the problem is not with them, but most likely between your ISP and Computer.
I have run into this, if I leave my mail client open on my mac, I don't receive all the IMAP gmail messages on the Blackberry. Must be a software glitch, I try and make it a point to not leave the email program running when I am out and about.