[Sith_Apprentice]

BIS checks the account when it is set up.
BIS doesnt find email.
BIS checks back in 15 minutes.
BIS finds email.
BIS compresses and sends email to the handheld. (first 2kb of the email)
BIS checks back for mail in 3 minutes.
BIS doesnt find mail.
BIS checks back for mail in 3 minutes.
BIS finds email.
BIS compresses and sends email to the handheld. (first 2kb of the email)
BIS checks back for mail in 3 minutes.
BIS doesnt find mail.
BIS checks back for mail in 3 minutes.
BIS doesnt find mail.
BIS checks back for mail in 3 minutes.
BIS doesnt find mail.
BIS checks back for mail in 3 minutes.
BIS doesnt find mail.
BIS checks back for mail in 3 minutes.
BIS doesnt find mail.
BIS checks back for mail in 15 minutes.
and so on and so forth.


rinse and repeat.

this is not for gmail/yahoo/carrier.blackberry.net account
With these accounts there should be little to no delay from receiving the email to the notification on your device. the BIS checks continously on gmail and yahoo, and since there is no mailbox for the carrier.blackberry.net account (the device is the mailbox) it is instant.