Freebsd, postfix and push email

[Ron (Lists)]

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.

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

Ron