In message "Diane Poremsky
[MVP]" was claimed to have wrote:

Gmail doesn't push to outlook. Outlook goes to gmail and collects the mail.
The phone and desktop should be within 5 minutes of 'sync' - outlook should
not be set to collect mail any more frequently than 5 - 8 minutes.

This really isn't true.

Gmail supports IMAP IDLE, which allows the server to push notifications
to connected clients without the client constantly polling.

However, Google doesn't push all changes via IDLE, only new messages, so
in practice you still need to poll to get updated folder views if you
use more than one mail client on a regular basis.

The above having been said, Outlook's IMAP IDLE support isn't fantastic,
Outlook doesn't always notice and reestablish the connection in the
event of a timeout, so it's not quite as good an experience as other
IMAP IDLE capable clients.