Freebsd, postfix and push email

Alejandro Imass ait at
Sun Mar 28 13:10:27 UTC 2010

On Sun, Mar 28, 2010 at 12:04 AM, Ron (Lists) <rg.lists at> wrote:
> Is there a way to get my freebsd/postfix setup to send push notifications to
> an iPhone (I assume other smart phones work the same way).  I've searched
> the web and I can't find any information about how to make this work.  I
> know it can be done with Exchange and ActiveSync, but I don't want to run
> any kind of exchange server.

Hmm, something similar recently came up here in the thread "Exchange
ActiveSync account", and in both cases there seems to be confusion in
the roles of the MTA, the MDA and the MUA.

The MTA is only responsible to relay mail to it's destination, the MDA
to store it somewhere and the MUA to retrieve it. The mail is
delivered in a mailbox and once it reaches that mailbox it is not the
MTA's nor the MDA's problem anymore. It just sits there until you can
reach your mailbox and read it. Many people think that IMAP, POP3 and
alike are part of the mail (MTA) system but they are not. They are
completely separate systems designed for you to be able to
access/fetch your mailbox(es) from a remote location. Remember that
email was invented on multi-user systems so when you log-in to a
machine via telnet, ssh or sitting on a terminal, you access your
email directly from the mailbox, you don't need to fetch it to a
remote location to read it.

Anyway, if you want to take mail from one mailbox and send it to
another location, you need to pop-it (regardless if it's pop, imap or
what have you) and then re-send it to the new destination. This is
usually not the work on an MTA AFAIK and you need to use other tools
such as Fetchmail.

Hope this helps,
Alejandro Imass

> Thanks for any help, or even a point in the right direction.
> Ron
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