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Glossary · Published 2026-09-29 · AgentiSend team

Inbound thread

Inbound thread: Messages grouped by their ids and reply headers. Receiving at your domain is not open yet.

Receiving mail at your own domain is not available yet. The receiving routes answer once that is open. They do not accept mail for your domain today.

A thread is the group of messages tied by Message-ID, In-Reply-To and References. A reply to mail that arrived in some other inbox still threads: copy those headers onto POST /emails. See MCP scope for inbound:read, which waits on the same opening.

Related terms

  • Sending domain — A domain you verify, then send from. An unverified From is refused.
  • MCP scope — A permission granted to a connected assistant. Sending spends the budget on that connection.