The MailEnable SyncML server is a component of the synchronization service. It provides a means for client devices (such as mobile phones, PDA’s etc.) to easily synchronize their contacts, calendar and tasks with an existing account on a MailEnable server (via HTTP requests). All that is needed on the client device is an internet connection and SyncML support (which most mobile phones today will have).

The MailEnable SyncML server supports version 1.2 (and below) of the SyncML Synchronization Protocol. It can process SyncML conversations in one of two ways, by exchanging plain text XML packages or WBXML (WAP Binary XML).

Most phones will communicate via WBXML while other SyncML clients may communicate via plain text XML.