As a business professional you haven't clarified what PUSH email is vs how you use emails on a BlackBerry with related alerts vs an iPhone.
1. BlackBerry PUSH is via NOC on BES systems. This is TRUE push - pushed by BES (Exchange, Domino, GroupWise; the latter barely used by large corporations in comparison to the other two).
- In a BES setup (BlackBerry BES or Good Inc's Good Technology; both use NTP patents - under license, RIM was sued then complied out of court with $$, Good before court when owned by Motorola a few years ago) - if your mailbox receives email BES will send the notification of new emails to your BB. Receive/Send gets priority over deletions (either pull from BB device, or push notifications from your Mailbox: client or web-based server). This is a seriously BASIC explanation, seriously basic.
- BES monitoring proves this to me about priority; hung threads, connection issues, etc are other issues that can affect direct PUSH being immediate.
2. Prior to Exchange 2003 SP2 (or was it 3) ... Microsoft Exchange used an SMS pull notification sent to a PPC/Windows Mobile 6.1/6.5 device then the device would PULL from the mailbox the updates required. Lame but thankfully that is all over and done with. Exchange Server 2007/2010 full support direct PUSH via ActiveSync/WebMail (over SSL).
3. IMAP4 ... in some web-based free offerings allow for a persistent connection - Apple engaged Yahoo's MAIL to enable this ... so it very much FEELS like push.
4. BlackBerry BIS - which is supported with a "yourname@provider.blackberry.net" is not fully push. In a way RIM's NOC try's to querry your webbased email mailbox account - in a similar fashion like persistent IMAP or POP whichever is enabled/supported.
- This is why it takes 20mins when first setting up your other web-based email accounts before you get your VERY FIRST email. After that .... RIM's NOC will querry on a 15mins interval: if there is emails, you'll get them , if any more are received in the 15mins initial interval you'll get them immediately (as long as you have a data connection), if not then the connection is closed and you wait another 15mins. This is by RIM's design, but note in the last 2yrs RIM has been doing this a LOT more efficiently with BIS upgrades to the point where its a LOT faster and seems like PUSH.
- if you don't believe me feel free to querry arguments on blackberry.com/btsc - unless updated in the last 3mths; I'm pretty sure I'm correct here.
5. iPhone setup using webmail settings from Exchange ActiveSync, or even Gmail's pseudo activesync implementation; I pretty much get emails from our Exchange Server 2007 SP2 on my iPhone FASTER by 3seconds than my BB Bold 9700/9780/9900 on the same corporate WLAN, ALL DAY LONG.
PS: Alexday ... you provide a REAL world road warriors use and requirement for a BlackBerry and you've shown just WHY BlackBerry's are NOT going anywhere for a serious business user; I applaud you!! However with 11 email accounts ... I think its time to reduce them down to say 5; do you really need that many?!! Trim the "phat" 😉
Hopefully Apple will improve its Exchange ActiveSync implementation ... currently on BB you cannot view another Calendar or Mailbox other than your own ... a SERIOUS limitation for years in a corporate setting, something Android and iPhone users currently with their own limitations CAN do.