XCON: SMTP Postmaster Mailbox Must Be Set Manually (223860)

SYMPTOMS

To designate a user's mailbox as the Postmaster mailbox for any local SMTP domain that is created, you must manually add the proxy postmaster@localdomainname (replacing localdomainname with the name of the local domain) to the user's list of SMTP proxy addresses in the Active Directory Users and Computers snap-in.

RESOLUTION

To designate a mailbox as the Postmaster mailbox:

In Active Directory Users and Computers, expand the domain, and then click the container.
Right-click the mailbox-enabled object, and click Properties from the shortcut menu.
Click the E-mail Addresses tab, and then click New.
In New E-mail Address, select SMTP Address, and then click OK.
Type the proxy e-mail address, for example: postmaster@test.com.
Click OK.

MORE INFORMATION

The following is taken from RFC 822:

   6.3. RESERVED ADDRESS

     It often is necessary to send mail to a site, without knowing any  
     of its valid addresses. For example, there may be mail system 
     dysfunctions, or a user may wish to find out a person's correct 
     address, at that site.

     This standard specifies a single, reserved mailbox address 
     (local-part) which is to be valid at each site. Mail sent to that 
     address is to be routed to a person responsible for the site's mail 
     system or to a person with responsibility for general site operation.  
     The name of the reserved local-part address is:

                                Postmaster

     so that "Postmaster@domain" is required to be valid.

     Note:  This reserved local-part must be matched without sensi-
            tivity to alphabetic case, so that "POSTMASTER", "postmas-
            ter", and even "poStmASteR" is to be accepted.