Your companion has an email address

Your companion can have an email address on your own domain — maggie@yourcompany.com, say — and mail sent to that address reaches the same companion you talk to in the app. A message from you lands in your existing conversation with it, not in a stranger's thread; a customer who writes three times gets one continuous conversation, not three. The companion reads that mail as untrusted input: nothing in an email can instruct it or unlock tools on your behalf, whoever the sender claims to be. Replies by email are built and will be switched on once the sending identity is settled; until then the companion's answer waits for you in the app.