(TODO) All IANA registered IMAP capabilities, response codes, keywords, mailbox attributes, the most relevant SASL mechanisms, and other relevant specifications.
- ⛔️: obsolete specifications that have been deprecated or replaced
- ⏭️: extensions that have been completely or partially included in [IMAP4rev2].
- ✨: extensions that are recommended for [IMAP4rev2] servers and clients. The IETF EXTRA WG decided that requiring them as a part of IMAP4rev2 would push the bar to implement too high for new implementations.
- 🗑: extensions that have been completely or partially deprecated or removed in [IMAP4rev2].
- 🍋: extensions that are included in the "Lemonade" profile [RFC5550].