can anyone explain to me what these messages from and to the postmaster are? who is the postmaster? 6 From:postmaster@smtp.mydomain.org 35 7 To:postmaster@smtp.mydomain.org 32

This should help http://www.petri.co.il/creating-a-postmaster-mailbox-in-exchange-server-2007.htm http://social.technet.microsoft.com/Forums/en/exchange2010/thread/bd1d06e2-319b-43e9-af1c-d104cd676ef2 We’ve all occasionally run into situations in which we have tried to e-mail someone and received an unexpected non delivery report. To a techie, a non delivery report contains a wealth of information that can be used to figure out why the message didn’t reach its intended recipient (I will be discussing this in detail in a future article). For the less technically savvy though, a non delivery report is nothing less than a brick wall in the face. Imagine the frustration that a casual user must feel at receiving a message filled with technical mumbo jumbo, and nowhere to turn to for help. If you are interested in helping senders who receive a non delivery reports, you can do so by creating a postmaster mailbox. By default, the postmaster is used to transmit non delivery reports and any other messages that are generated internally by Exchange. However, Exchange 2007 does not contain a postmaster mailbox. This means that those who receive non delivery reports cannot reply back and ask for help. Before I show you how to get around this issue, I need to explain that the primary reason why Microsoft chose not to include a postmaster mailbox in Exchange 2007 was because the postmaster could potentially receive a lot of spam. Even so, if your company receives e-mail messages from customers, it may be worthwhile to allow senders to reply to NDRs. Jasjit Singh Dhindsa | ITIL v3 | IASA Foundation Certified | MCITP:Exchange 2010 | Exchange 2007 | MCTS:OCS 2007 | Exchange 2010 | Exchange 2007 | MCSA:Messaging | Security | MCSE:Messaging | Security

so it looks like I should only create the postmaster mailbox if I want to read the NDR messages that are created, or respond to replies to NDR messages from others. right?

so it looks like I should only create the postmaster mailbox if I want to read the NDR messages that are created, or respond to replies to NDR messages from others. right? Yes, Thats CorrectJasjit Singh Dhindsa | ITIL v3 | IASA Foundation Certified | MCITP:Exchange 2010 | Exchange 2007 | MCTS:OCS 2007 | Exchange 2010 | Exchange 2007 | MCSA:Messaging | Security | MCSE:Messaging | Security