Outlook add-in
Delivered To
Shows the exact address an open message was delivered to, including aliases, and which mailbox it landed in.
It compares your address list with the message’s To, Cc, and delivery headers. If none of those name one of your addresses, it says so and shows the headers it checked.
Outlook loads taskpane.html from this host. The default address list is
config/addresses.json. A list saved in the pane overrides that file for the
mailbox you’re reading. This host does not collect usage data.