Embodiments of the invention may provide the ability to convert a non-supported email address (i.e., an email address that conforms to a standard that is not supported by the receiving device) into a supported email address (e.g., an email address that conforms to a standard that is supported by the receiving device). Embodiments of the invention may perform this conversion, for example, when an email communication containing a non-internet-standard email address is to be delivered or synchronized to a mobile device that only supports standard internet addresses. Similarly, embodiments of the invention may perform this conversion when a calendar entry, a task, a contact, or other data package containing such a non-supported email address is to be delivered or synchronized to a mobile device that does not support such an email address.