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 sensitivity to alphabetic case, so that "POSTMASTER", "postmaster", and even "poStmASteR" is to be accepted.
- So in this day of spam filters that gobble up mail or spit it back at you anytime some RFC isn't followed, most of us will have a postmaster@domain address in our organizations. You had better get rid of it before doing an SBS2003 to SBS2008 migration. Something as simple as that can cause irreparable damage to Companyweb and Exchange on the new server. Requiring restore of source server and restarting the migration after removing the postmaster address. Here is a link to some of the gotchas for the great adventure called SBS Migration. http://blogs.technet.com/b/sbs/archive/2009/02/19/sbs-2008-migrations-from-sbs-2003-keys-to-success.aspx
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