[aiharkness]

A couple things you should be aware of (and some is a repeat of what is in the FAQ ling posted by Dubdub)

First, some BIS email is pushed to the device immediately depending on the email service. Example would be Yahoo and Windows Live, but there are others. My old AT&T Worldnet is now hosted by Yahoo and it is pushed immediately.

In other cases, BIS polls the email inbox periodically, on something like a 15 minute cycle, and it grabs new messages and pushes to the handset. If it is frequently finding new messages it will poll more frequently until it find the inbox empty. That's the way it's supposed to work, and the way things always are, sometimes there are delays.

Now, if you are using a client and it is set to delete messages from the server after retrieval, you may be downloading email before BIS has grabbed it. A solution is to set the client to leave email on the server.
Posted via BlackBerryForums.com Mobile