The following is a chart showing the out of the box feature set of Horde_ActiveSync compared to other servers supporting EAS.
|Feature||Horde 4/5||Z-Push 1/2||Tine 2.0||Notes|
|EAS Version||2.5/12.1||2.5/14*||2.5||* Z-Push 2 supports 14.0 only when using against Zarafa server.|
|Proper support for ghosted properties|
|Contact Sync||Yes||Yes*||Yes||* Contact support out of the box with Z-Push only when using against Zarafa server.|
|Global Address Book|
|Recurring Event Support|
|Hierarchical folder support|
|Full MIME support|
|S/MIME on device encryption, decryption, and signing|
|Proper use of message class||Message class is used so emails display with proper icons indicating type of message. E.g., Meeting acceptance vs Denial, delivery notice messages etc... They are also used to help the client link e.g., meeting request emails with matching calendar item. Not all clients display these icons. Mostly used on Windows Mobile clients.|
|Set out of office message|
|Efficient memory use via use of temporary streams.|
TODO: Security policies, other misc. features.