Delete a mailbox
Deletes the mailbox and its aliases, and asks the mailbox service to deprovision it. The publish failure path is swallowed, so a 200 does not guarantee the account is gone downstream. The address stays reserved and cannot be created again, because mail still in flight for it must not reach a new owner. Requires the mailboxes:write scope.
Authorizations
An organization API key, prefixed bk_live_. Takes precedence over Authorization when both are sent. The key is bound to one organization, and the scopes it was issued with are enforced per endpoint.
Headers
Required when authenticating with an access token. Optional with an API key, whose own organization binding is authoritative; a value contradicting it is refused with 403.