The postmaster is responsible for managing the mail for the site. The postmaster mailbox is a system-wide mailbox set aside for the postmaster. This mailbox is an internal system mailbox integral to the operation of the Messaging system. Use these instructions to create a postmaster mailbox.
Ensure Messaging is running.
In the Last name field, enter postmaster.
In the Mailbox number field, enter a unique mailbox number for the postmaster.
In the Extension field, enter the extension of the postmaster.
The length of the mailbox number and extension must match the length that you specified in Setting the length of mailbox numbers.
Include in Auto Attendant directory
User must change voice messaging password at next logon
New password
Confirm password
The system creates a site-wide mailbox.
Define the mailbox that you just created as the postmaster mailbox. See Configuring the postmaster mailbox number.