A New Internet-Draft is available from the on-line Internet-Drafts directories.
Abstract : «The Push-IMAP protocol (P-IMAP) defines extensions to the IMAPv4 rev1 protocol [RFC3501] for optimization in a mobile setting, aimed at delivering extended functionality for mobile devices with limited resources. The first enhancement of P-IMAP is that unlike a standard IMAPv4 Rev1 server, which relies on the client to constantly initiate contact to ask for state changes, the P-IMAP server can push crucial changes to a client. In addition, P-IMAP contains extensions for email filter management, message delivery, and maintaining up-to-date personal information. Bindings to specific transport are explicitly defined. »
http://www.ietf.org/internet-drafts/draft-maes-lemonade-p-imap-00.txt