Try the following:
Select the mail account
Click Edit button on the right side
Click Tab "Receiving options"
Check "Automatically check for new mails every " below the heading Checking for new and mail and set the time
Now send yourself a mail and see if it gets automatically notified after the pre-set amount of time?
Last edited by TheIndependentAquarius; 02-03-2010 at 02:44 AM.