IMAP4rev2 (RFC 9051)

1. State and flow diagram

   Not Authenticated, Authenticated, Selected and Logout states.

2. Data formats

   Atoms, strings, literals, parenthesized lists and message attributes.

3. Message attributes

   UIDs, message sequence numbers, flags and internal date.

4. Any-state commands

   CAPABILITY, NOOP and LOGOUT.

5. Authentication commands

   STARTTLS, AUTHENTICATE and LOGIN.

6. Authenticated state commands

   SELECT, LIST, STATUS, CREATE, APPEND.

7. Selected state commands

   SEARCH, FETCH, STORE, COPY and UID operations.

8. Server responses

   Status responses, server and mailbox status data.

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