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With the BlackBerry Enterprise Solution, IT policies are one-way, server-initiated outbound communications. This ensures that administrators can control each BlackBerry smartphone reliably, with complete confidence that the device is compliant — users can’t intervene or prevent a policy from being applied once the administrator has initiated it. As well, IT policies carry unique digital signatures to ensure that only the designated BlackBerry Enterprise Server can send updates to a BlackBerry smartphone.
Many smaller organizations don’t have any trained IT professionals on staff, and if they do, supporting an email server is just one more thing on a huge list of items the IT team (which is quite often just one person) has to handle. As mentioned earlier, these busy individuals are often strapped and stressed out, so a BlackBerry Enterprise Server solution can be a breath of fresh air. While it does require some regular attention if it is managed in-house, a BlackBerry Enterprise Server is easy to connect to an Exchange server and is relatively straightforward to manage from there on out.
In the “pull” environment of BlackBerry Internet Service, your mobile carrier‘s BlackBerry Internet server periodically checks your mail server for new messages, pulls them up to the BlackBerry Internet Service using a standard POP3 connection, and then pushes the messages out wirelessly to your BlackBerry smartphone. While you can schedule this to happen at regular intervals, the extra step of having to retrieve (pull) the messages inevitably slows the process down, so real-time email just isn’t possible.
The same is true with sending emails from your BlackBerry smartphone. While your device pushes any emails you send to your mobile carrier’s BlackBerry Internet Service servers, in virtual real time, you will have to wait until the next time the BlackBerry Internet Service connects with your mail server for each message to actually be sent out over the Internet to its recipient.
