The Subscription Manager add-in (SUM) is designed for automatic adding/deleting subscribers to/from Microsoft Outlook 2000/XP distribution lists based on special e-mail messages from them (requests).

Subscription Manager works with Microsoft Outlook 2000/XP only, and doesn't works with Outlook Express and Microsoft Outlook 97/98. Also, SUM is not standalone application, it load on start of Outlook.

A request is a standard e-mail message that contains a command for SUM in its "Subject" field.

SUM is capable of processing "subscribe", "unsubscribe" and "help" requests. When subscribe or unsubscribe request is received, the user is added to or deleted from the distribution list specified in the request. Upon receipt of a help request, a message with information about current subscription status and request sending rules is sent to the user. The adding to the distribution list can be made both with obtaining confirmation from the user and without it.

Once a request is processed, SUM sends auto-reply with information about processing result.

SUM doesn't send regular messages to distribution list subscribers. Use Microsoft Outlook common features to perform that task.