Second, you can add a Cache-Control: private header onto the result of your frontpage.pl and editprefsform.pl scripts. This means that the pages are cached on the mobile device (but nowhere else). The M-Business Sync Server will always execute frontpage.pl every time a user synchronizes (because there is no max-age ), but it will take a look at the resulting HTML page and compare it to what exists on the user's device. If they are exactly the same, it will not bother uploading the page onto the mobile device again, thereby saving a good chunk of time.

For more information about caching, be sure to check out Caching to Improve Channel Performance.