Extension support status

[emersion]

See:

• Capabilities: https://www.iana.org/assignments/imap-capabilities/imap-capabilities.xhtml#imap-capabilities-1
• Active drafts: https://datatracker.ietf.org/doc/search?name=imap&sort=&activedrafts=on&by=group&group=
• https://gist.github.com/nevans/8ef449da0786f9d1cc7c8324a288dd9b

Extension	RFC	Client	Server
IMAP4rev1	3501	✓	✓
IMAP4rev2	9051	✓	✓
NAMESPACE †	2342	✓	✓
UNSELECT †	3691	✓	✓
UIDPLUS †	4315	✓	✓
ESEARCH †	4731	✓	✓
SEARCHRES †	5182	✓	✓
ENABLE †	5161	✓	✓
IDLE †	2177	✓	✓
SASL-IR †	4959	✓	✓
LIST-EXTENDED †	5258	✓	✓
LIST-STATUS †	5819	✓	✓
MOVE †	6851	✓	✓
LITERAL- †	7888	✓	✓
STATUS=SIZE †	8438	✓	✓
ACL	4314	✗	✗
APPENDLIMIT	7889	✓	✓
BINARY	3516	✓	✓
CATENATE	4469	✗	✗
CHILDREN	3348	✗	✗
CONDSTORE	7162	✓	✗
CONVERT	5259	✗	✗
CREATE-SPECIAL-USE	6154	✗	✗
ESORT	5267	✗	✗
FILTERS	5466	✗	✗
ID	2971	✓	✗
LANGUAGE	5255	✗	✗
LIST-MYRIGHTS	8440	✗	✗
LITERAL+	7888	✓	✗
LOGIN-REFERRALS	2221	✗	✗
MAILBOX-REFERRALS	2193	✗	✗
METADATA	5464	✓	✗
MULTIAPPEND	3502	✗	✗
MULTISEARCH	7377	✗	✗
NOTIFY	5465	✗	✗
OBJECTID	8474	✗	✗
PARTIAL	9394	✗	✗
PREVIEW	8970	✗	✗
QRESYNC	7162	✗	✗
QUOTA	9208	✓	✗
QUOTASET	9208	✓	✗
REPLACE	8508	✗	✗
SAVEDATE	8514	✗	✗
SEARCH=FUZZY	6203	✗	✗
SORT	5256	✓	✗
SORT=DISPLAY	5957	✗	✗
SPECIAL-USE	6154	✓	✗
THREAD	5256	✓	✗
UNAUTHENTICATE	8437	✓	✓
URL-PARTIAL	5550	✗	✗
URLAUTH	4467	✗	✗
UTF8=ACCEPT	6855	✓	✓
UTF8=ONLY	6855	✗	✗
WITHIN	5032	✗	✗
UIDONLY	9586	✗	✗
LIST-METADATA	9590	✗	✗
INPROGRESS	9585	✗	✗

† Folded in IMAP4rev2