Auto reply for non exist mailbox

Question

Hi,
Can someone guide me through configuring Auto reply to the deleted or non existing mail box with a custom message, tried to create hub transport rule but didn't work. Pls. suggest

Thanks

Answer 1

How did you set your transport rule?
I would try something like this:

If:the header "to" contains "@yourdomain.com", or you can test if "the recipient domain is..." or "the recipient address includes specific words " would work.

Do: Reject the message with explaination...

Except: the recipient is a member of this group (this groups contains all existing users) or the recipient is this person(ctrl+A to select all users)

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Answer 2

HI there. Not really possible if the mailbox does not exist. You would have to add it as an additional alias to an existing mailbox and create an Outlook reply rule using a template/ server side message or create a new mailbox for it and do the same thing.