Date: Sun, 28 Mar 2010 21:49:43 +0100 From: krad <kraduk@googlemail.com> To: Dan Nelson <dnelson@allantgroup.com> Cc: Tim Judd <tajudd@gmail.com>, perryh@pluto.rain.com, Ron <rg.lists@rzweb.com>, Jeffrey Goldberg <jeffrey@goldmark.org>, freebsd-questions@freebsd.org Subject: Re: Freebsd, postfix and push email Message-ID: <d36406631003281349j6ac3c591gf664705930b89c87@mail.gmail.com> In-Reply-To: <20100328203849.GD4806@dan.emsphone.com> References: <4BAED536.2060205@rzweb.com> <ade45ae91003272212j297b1ca2o57fbf682b1832951@mail.gmail.com> <4baef8de.00G1oLWhtZbJ8Rwl%perryh@pluto.rain.com> <E3865D82-E65A-4440-A663-6B3C3C259F6B@goldmark.org> <4BAFB9AC.7040406@rzweb.com> <20100328203849.GD4806@dan.emsphone.com>
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On 28 March 2010 21:38, Dan Nelson <dnelson@allantgroup.com> wrote: > In the last episode (Mar 28), Ron said: > > 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). > > For ActiveSync at least, the phone has to keep a TCP connection to the > server open 24/7, and the server sends a notification when a new mail > arrives. MobileMe probably works the same way. The IMAP protocol supports > a similar "notify on new mail" option, but for some reason Apple doesn't > use > it in their client. > > -- > Dan Nelson > dnelson@allantgroup.com > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" > To totally confuse thin most modern mtas can easily be configured to pipe mails to an external program or pipe. This can then to whatever, include pushing stuff to a mobile phone I would imagine.
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