sender_domain_required

notify(), a relay's email_person, and the dashboard Inbox (a new conversation or a reply) send only from your own verified sender domain.

Status: HTTP 409 · Messages and email

What happened

notify(), a relay's email_person, and the dashboard Inbox (a new conversation or a reply) send only from your own verified sender domain. Until one is verified on the Domains page, the send is refused: nothing is sent or recorded, no cap is spent, and the same key sends once you verify. (via Gemmein).

What to do

Sign-in codes are the one email Gemmein sends on your behalf before that, as <App name>.