The E-mail method does not require the synchronisation server to be able to see the Remote Workgroup's database. Instead, OfficeTalk's Internet Mail service can handle the delivery of replication data and replication requests. This method is asynchronous and has the same advantages and disadvantages as the Asynchronous method except that no direct database access is necessary. All that is required is an e-mail address for the Remote Workgroup.
This method uses the least network bandwidth of the three methods but does require that each workgroup has access to an Internet Service Provider or has its own SMTP/POP3 based mail backbone.