aze (./131) :
imap le fait aussi

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In contrast to traditional e-mail, most of the protocols used in popular current systems are proprietary; for example, BlackBerry uses its own private protocols developed by RIM. Both the Push-IMAP standard and parts of the SyncML standards are attempting to develop more open solutions.The Lemonade Profile is an IETF modification to IMAP and SMTP to make them more suited to the demands of mobile e-mail, it relies on the existing IDLE (RFC 2177) command to provide instant e-mail notification on the client device. IDLE is not strictly push e-mail although it does provide the same user experience.

(wikipedia)