I'm very new to Exchange (in fact, an apprentice and studying it at the moment) and am wondering how the Postmaster@domain.com address works. An example:
A smarthost configured with one mailbox, Postmaster@serverfault.com, with an *@serverfault.com alias so, my understanding, all mail sent to *@serverfault.com is SMTP forwarded onto the firstname.lastname@example.org address.
But what happens now? Does Exchange have a master mailbox Postmaster, that receives all this mail and just dishes it out to the correct mailbox? Or is what I just wrote a pile of garbage!
So I'm a little confused. On the Smart Host - there is SMTP forwarding to forward all SMTP to IP Address x.x.x.x which is active for a mailbox on the smarthost called Postmaster@domain.co.uk with an alias of *@domain.co.uk? How is this working exactly?