When you receive new mail messages while you are logged in, a notification message will appear on your terminal:
New mail on node SIGURD from IN%"MROCHECK@ACME.COM"In this example, you have received a new mail message from MROCHEK@ACME.COM. The node which actually delivered this message to your mailbox was SIGURD.
With a message of the form
You have 7 new messages.you will be notified if you have any new, unread messages both when you log in and when you invoke PMDF MAIL. See Section 7.3 for directions on how to read your mail messages.