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'Direct Push' technology is an additional feature added to Microsoft Exchange 2003 with service pack 2 that adds messaging and security features.A phone device running Windows Mobile 5 is enabled to poll the Exchange Server every 30 minutes.In Japan, "push email" has been standard in cell phones since 2000.Apple's i Phone, i Pad and i Pod Touch support Hotmail push email.
If the receiver uses a polling email delivery protocol, the final step from the last mail delivery agent to the client is done using a poll.
Yahoo Mail may be pushed to an Android device, as Android now supports IMAP4 (as of September 2015).
An alternative for Yahoo Mail is to install the free Yahoo Mail app, which provides instant push email.
Nokia Messaging Email is a push email service and client application that supports most of the popular email providers like Windows Live Hotmail, Yahoo! Nokia Messaging servers aggregate messages from up to ten accounts on and pushes them to compliant devices (Nokia S60 and some S40, plus Maemo-based devices like the N900).
available through the use of 3rd Party software Chatter Email as early as 2004. The Palm Pre web OS has push email for Gmail, IMAP, and Exchange accounts. has native push mail applications on Android (still in Beta), Mediatek, Spreadtrum, MStar Semiconductor, and Qualcomm Binary Runtime Environment for Wireless.
The Internet Message Access Protocol (IMAP) provides support for polling and notifications.