From owner-freebsd-questions@FreeBSD.ORG Sun Mar 28 20:18:54 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 07972106566C for ; Sun, 28 Mar 2010 20:18:54 +0000 (UTC) (envelope-from rg.lists@rzweb.com) Received: from flabnapple.net (flabnapple.net [216.129.104.99]) by mx1.freebsd.org (Postfix) with ESMTP id E79D78FC14 for ; Sun, 28 Mar 2010 20:18:53 +0000 (UTC) Received: from Grumpy.local (c-67-188-153-23.hsd1.ca.comcast.net [67.188.153.23]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by flabnapple.net (Postfix) with ESMTPSA id 49F431CC045; Sun, 28 Mar 2010 13:18:53 -0700 (PDT) Message-ID: <4BAFB9AC.7040406@rzweb.com> Date: Sun, 28 Mar 2010 13:18:52 -0700 From: Ron User-Agent: Thunderbird 2.0.0.24 (Macintosh/20100228) MIME-Version: 1.0 To: Jeffrey Goldberg References: <4BAED536.2060205@rzweb.com> <4baef8de.00G1oLWhtZbJ8Rwl%perryh@pluto.rain.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Tim Judd , perryh@pluto.rain.com, freebsd-questions@freebsd.org Subject: Re: Freebsd, postfix and push email X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Mar 2010 20:18:54 -0000 Jeffrey Goldberg wrote: > On Mar 28, 2010, at 1:36 AM, perryh@pluto.rain.com wrote: > >> Er, no. POP3 and IMAP are "pull" services, wherein the client >> polls the server periodically for any newly-arrived messages. > > IMAP, but not POP3, can be used to push, but the iPhone mail client > doesn't support that as far as I know. It does support being pushed > to over Mobile Me, but not on regular IMAP. > So how is Mobil Me and Exchange Servers (MS, Zimbra, etc) doing it? That's what I'd like to replicate on my FreeBsd server. This seems to be a well guarded secret I'd like to crack. On the iPhone, at least, the phone is not polling the servers, some kind of message (SMS?) is being sent to the phone that makes it put a little red badge on the corner of the mail app icon telling it how many messages are waiting. The messages don't seem to be download during the push, it's just a count (I could be wrong about this). -- R