I need help. Kindly share your experience on how to do it.
My Exchange Server 2003 SP2 is running very well. My boss asked me a question, it brought me the attention on how to do it.
In Outlook using POP3 account, he clicks create new message, and view From: field, manually type his personal email address (e.g. email@example.com), the rest is normal. So, he click Send button to send out this message, he received bounced message "Unable to deliver message to "firstname.lastname@example.org":550 5.7.1".
I would wonder how I can configure my Exchange only accept email@example.com as authorized external email address being able success relay to.
I sudden think of, my general manager also asked me this similar question last year.
Appreciated if you can help.