Fastmail

Fastmail uses JMAP for email. Mailboxes, search, fetch, triage, send, masked email, drafts.

Data Model

• Mailboxes (provide mailbox_id for search/fetch), Emails (search by mailbox_id, filter; fetch by id), Threads (fetch by id), Masked Emails, Drafts (create, list, fetch, delete).

Gotchas

• JMAP: Session URL discovered at runtime; apiUrl + account ids from session.
• mailbox_id: Required for search; from list mailboxes.