Most mail servers will accept mail addressed to "postmaster". However, in my experience, Exchange servers rarely do. Is there a common address similar to postmaster that exchange servers will accept mail for?
postmaster is among the standard aliases that all SMTP servers should have available.
Microsoft often ignores established Internet standards with their software. Point being, it is rarely safe to assume that the Microsoft approach is the right way.
It often is necessary to send mail to a site, without know- ing 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.
I personally like to have postmaster, mailer-daemon, abuse, root, hostmaster, and webmaster. The aliases, of course, are based on what type of servers I typically run.
You could argue root is superfluous but I like to do it anyway.
postmaster, abuse, and mailer-daemon are always a requirement in my world.
webmaster and hostmaster are dependent on whether or not you run DNS or a Web site. These days, if you're responsible for an Internet domain, chances are these will apply to you as well.
Exchange 2007, at least on SBS 2008, comes with a "Postmaster and Abuse Reporting" distribution group out of the box. All you have to do is add a user to that distribution group to receive the e-mails. If they don't want their main inbox to get spammed with the messages, they can add a rule via Outlook to move it to a sub-folder.
The reason it usually doesn't go anywhere by default is that the only default member is another distribution group that requires senders to be authenticated, blocking most mail from the open Internet. Adding an explicit user to the distribution group solves the problem without having to create separate AD accounts for postmaster@, abuse@, etc.