Forward an email ONLY to that forward

Is there a way to take and have it so that the only place those emails go is to

“Bob” has left our company, and I only want “Mary” to receive any emails going to Bob’s email address.

I tried forwarding to, in the “Forward-Only Email” section of the email page on DH, but an error came up saying that Mary was already an email address.

All I want to do is have Bob’s email go to Mary’s inbox.

You’ll first need to remove it, then recreate it again as “Forward Only”.

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