Originally Posted by george.z
do the emails servers you are using have push email? If not, net the blackberry will only check for new email every 20 mins. If you receive an email it will check every 3 minutes until there are no more emails then it reverts back to 20 mins. Sending an email will also trigger the blackberry to start checking again every 3 mins.
It's actually every 15 minutes with email "polling."
"Push Email" is actually the "idle" function of the IMAP email protocol. It allows a connection between the BIS server and the mail server to remain in an open state so that the BIS server "sees" new email right away.
fyi: aol/aim, hotmail, yahoo, gmail are all capable of this.
I can't remember having this many BIS problems with the Curve, or other BB's i have had.