Registries included below
IETF Review
Client implementations compliant with [RFC3501] SHOULD NOT require any capability name other than "IMAP4rev1". Client implementations compliant with [RFC9051] SHOULD NOT require any capability name other than "IMAP4rev2", and possibly "STARTTLS" and "LOGINDISABLED" (on a cleartext port). All client implementations MUST ignore any unknown capability names.The prefix "QUOTA=RES-" is reserved per [RFC9208, Section 9.1].See Section 9.2 of that document for values that follow this prefix.All other capabilities starting with the "QUOTA=" prefix are reserved for future IETF Stream extensions to [RFC9208].
| Capability Name | Reference |
|---|---|
| ACL | [RFC4314] |
| ANNOTATE-EXPERIMENT-1 | [RFC5257] |
| APPENDLIMIT | [RFC7889] |
| AUTH= | [RFC3501][RFC9051] |
| BINARY | [RFC3516] |
| CATENATE | [RFC4469] |
| CHILDREN | [RFC3348] |
| COMPRESS=DEFLATE | [RFC4978] |
| CONDSTORE | [RFC7162] |
| CONTEXT=SEARCH | [RFC5267] |
| CONTEXT=SORT | [RFC5267] |
| CONVERT | [RFC5259] |
| CREATE-SPECIAL-USE | [RFC6154] |
| ENABLE | [RFC5161] |
| ESEARCH | [RFC4731] |
| ESORT | [RFC5267] |
| FILTERS | [RFC5466] |
| I18NLEVEL=1 | [RFC5255] |
| I18NLEVEL=2 | [RFC5255] |
| ID | [RFC2971] |
| IDLE | [RFC2177] |
| IMAP4REV1 | [RFC3501] |
| IMAP4REV2 | [RFC9051] |
| IMAPSIEVE= | [RFC6785] |
| INPROGRESS | [RFC9585] |
| JMAPACCESS | [RFC9698] |
| LANGUAGE | [RFC5255] |
| LIST-EXTENDED | [RFC5258] |
| LIST-METADATA | [RFC9590] |
| LIST-MYRIGHTS | [RFC8440] |
| LIST-STATUS | [RFC5819] |
| LITERAL+ | [RFC7888] |
| LITERAL- | [RFC7888] |
| LOGIN-REFERRALS | [RFC2221] |
| LOGINDISABLED | [RFC3501][RFC9051] |
| MAILBOX-REFERRALS | [RFC2193] |
| MESSAGELIMIT= | [RFC9738] |
| METADATA | [RFC5464] |
| METADATA-SERVER | [RFC5464] |
| MOVE | [RFC6851] |
| MULTIAPPEND | [RFC3502] |
| MULTISEARCH | [RFC7377] |
| NAMESPACE | [RFC2342] |
| NOTIFY | [RFC5465] |
| OBJECTID | [RFC8474] |
| PARTIAL | [RFC9394] |
| PREVIEW | [RFC8970] |
| QRESYNC | [RFC7162] |
| QUOTA | [RFC9208] |
| QUOTA= | [RFC9208] |
| QUOTASET | [RFC9208] |
| REPLACE | [RFC8508] |
| RIGHTS= | [RFC4314] |
| SASL-IR | [RFC4959] |
| SAVEDATE | [RFC8514] |
| SAVELIMIT= | [RFC9738] |
| SEARCH=FUZZY | [RFC6203] |
| SEARCHRES | [RFC5182] |
| SORT | [RFC5256] |
| SORT=DISPLAY | [RFC5957] |
| SPECIAL-USE | [RFC6154] |
| STARTTLS | [RFC3501][RFC9051] |
| STATUS=SIZE | [RFC8438] |
| THREAD | [RFC5256] |
| UIDONLY | [RFC9586] |
| UIDPLUS | [RFC4315] |
| UNAUTHENTICATE | [RFC8437] |
| UNSELECT | [RFC3691] |
| URL-PARTIAL | [RFC5550] |
| URLAUTH | [RFC4467] |
| URLAUTH=BINARY | [RFC5524][RFC Errata 6214] |
| UTF8=ACCEPT | [RFC9755] |
| UTF8=ALL (OBSOLETE) | [RFC5738][RFC9755] |
| UTF8=APPEND (OBSOLETE) | [RFC5738][RFC9755] |
| UTF8=ONLY | [RFC9755] |
| UTF8=USER (OBSOLETE) | [RFC5738][RFC9755] |
| WITHIN | [RFC5032] |
Specification Required
Alexey Melnikov, Ken Murchison
| Name of the Quota Resource Type | Description | Extra required IMAP commands/responses | Extra optional IMAP commands/responses | Author | Change Controller | Reference |
|---|---|---|---|---|---|---|
| STORAGE | The physical space estimate, in units of 1024 octets, of the mailboxes governed by the quota root. | DELETED-STORAGE STATUS request data item and response data item | N/A | [Alexey_Melnikov] | [IESG] | [RFC9208, Section 5.1] |
| MESSAGE | The number of messages stored within the mailboxes governed by the quota root. | DELETED STATUS request data item and response data item | N/A | [Alexey_Melnikov] | [IESG] | [RFC9208, Section 5.2] |
| MAILBOX | The number of mailboxes governed by the quota root. | N/A | N/A | [Alexey_Melnikov] | [IESG] | [RFC9208, Section 5.3] |
| ANNOTATION-STORAGE | The maximum size of all annotations [RFC5257], in units of 1024 octets, associated with all messages in the mailboxes governed by the quota root. | N/A | N/A | [Alexey_Melnikov] | [IESG] | [RFC9208, Section 5.4] |
| ID | Name | Contact URI | Last Updated |
|---|---|---|---|
| [Alexey_Melnikov] | Alexey Melnikov | mailto:alexey.melnikov&isode.com | 2021-12-09 |
| [IESG] | IESG | mailto:iesg&ietf.org | 2021-12-09 |