1. On the server, turn on the NotifyMail protocol in the Advanced Mail Settings, Network panel of the Mail Admin.
2. Open each user account that you want to use with NotifyMail, select Mail Settings from the popup menu, click options (the account must be configured to enable mail) and then choose Enable NotifyMail. Then select "Notify user at the IP Address below" or "Notify user at the last IP Address the user logged onto". If using the former, enter your IP address in the space provided. The latter method is preferred as you can change machines without your administrator having to make a modification to the server. In order for AppleShare IP to notify you using the latter method, you must check your mail (using your email client) at least once.

   When configuring NotifyMail, make sure the TCP port is set to 79

Below is a screenshot from AppleShare IP 6.0 showing the configuration.