# Supported Standards
**Legend**
* ✔ = This line item is supported for the given platform
* ✖ = This line item is not (yet) supported for the given platform
* *empty* = We have not collected the standards information for the given platform yet
* N/A = The standard does not apply to the given platform
### Mail
| Spec Name | Spec URLs | Desktop Status | Android Status | Standards Involvement | Comment |
| --------- | :------------------------------------------------------: | :------------: | :------------: | --------------------- | ------- |
| POP3 | [rfc1939](https://datatracker.ietf.org/doc/html/rfc1939) | ✔ | ✔ | | |
| IMAP 4r1 | [rfc3501](https://datatracker.ietf.org/doc/html/rfc3501) | ✔ | ✔ | | |
| IMAP IDLE | [rfc2177](https://datatracker.ietf.org/doc/html/rfc2177) | ✔ | ✔ | | |
| SMTP | [rfc821](https://datatracker.ietf.org/doc/html/rfc821) | ✔ | ✔ | | |
| NNTP | [rfc977](https://datatracker.ietf.org/doc/html/rfc977) | ✔ | ✔ | | |
### RSS Feeder
| Spec Name | Spec URLs | Desktop Status | Android Status | Standards Involvement | Comment |
| --------- | :----------------------------------------------------------------------------: | :------------: | :------------: | --------------------- | ------- |
| RSS 0.9 | [rss-0-9-0](https://www.rssboard.org/rss-0-9-0) | ✔ | N/A | | |
| RSS 2.0 | [rss-spec](https://www.rssboard.org/rss-specification) | ✔ | N/A | | |
| Atom 0.3 | [atom-0-3](https://datatracker.ietf.org/doc/html/draft-ietf-atompub-format-00) | ✔ | N/A | | |
| Atom 1.0 | [atom-1-0](https://datatracker.ietf.org/doc/html/rfc4287) | ✔ | N/A | | |
### Mailing Lists
| Spec Name | Spec URLs | Desktop Status | Android Status | Standards Involvement | Comment |
| ----------------------- | :----------------------------------------------------------------------------------------------------------------: | :------------: | :------------: | --------------------- | ------- |
| List Management Headers | [rfc2369](https://datatracker.ietf.org/doc/html/rfc2369), [rfc5064](https://datatracker.ietf.org/doc/html/rfc5064) | ✔ | ✔ | | |
### Security and Authentication
| Spec Name | Spec URLs | Desktop Status | Android Status | Standards Involvement | Comment |
| --------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :------------: | :------------: | ---------------------------- | ----------------------------------------------------------- |
| MIME | [rfc2045](https://datatracker.ietf.org/doc/html/rfc2045), [rfc2046](https://datatracker.ietf.org/doc/html/rfc2046), [rfc2047](https://datatracker.ietf.org/doc/html/rfc2047) | ✔ | ✔ | | All 3 are supported for both Desktop and Android platforms. |
| OpenPGP | [rfc4880](https://datatracker.ietf.org/doc/html/rfc4880) | ✔ | ✔ | Kai Engert actively involved | |
| S/MIME version? | | ✔ | ✖ | | |
| oAuth 2.0 | [rfc6749](https://datatracker.ietf.org/doc/html/rfc6749) | ✔ | ✔ | | See also |
### Address Book
| Spec Name | Spec URLs | Desktop Status | Android Status | Standards Involvement | Comment |
| ------------------------------------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :------------: | :------------: | --------------------- | --------------------------------------------------- |
| vCard | rfc6350
rfc2425
vcard-21
| ✔ | ✖ | | Version 4 used by default |
| CardDAV | [rfc6352](https://datatracker.ietf.org/doc/html/rfc6352) | ✔ | N/A | | See also |
| Collection Synchronization for WebDAV | [rfc6578](https://datatracker.ietf.org/doc/html/rfc6578) | ✔ | N/A | | |
| LDAP | [rfc4511](https://datatracker.ietf.org/doc/html/rfc4511) | ✔ | N/A | | See also |
| LDIF | [rfc2849](https://datatracker.ietf.org/doc/html/rfc2849) | ✔ | N/A | | Supported for import and export |
### Calendar
| Spec Name | Spec URLs | Desktop Status | Android Status | Standards Involvement | Comment |
| ------------------------------------- | :------------------------------------------------------: | :------------: | :------------: | --------------------- | -------------------------------------------------- |
| iCalendar | [rfc5545](https://datatracker.ietf.org/doc/html/rfc5545) | ✔ | ✖ | | |
| CalDAV | [rfc4791](https://datatracker.ietf.org/doc/html/rfc4791) | ✔ | N/A | | See also |
| Collection Synchronization for WebDAV | [rfc6578](https://datatracker.ietf.org/doc/html/rfc6578) | ✔ | N/A | | |
| CalDAV Scheduling | [rfc6638](https://datatracker.ietf.org/doc/html/rfc6638) | | N/A | | |
| iTIP | [rfc2446](https://datatracker.ietf.org/doc/html/rfc2446) | ✔ | ✖ | | |
### Instant Messaging
| Spec Name | Spec URLs | Desktop Status | Android Status | Standards Involvement | Comment |
| ---------------------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :------------: | :------------: | ------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| IRC | [rfc1459](https://datatracker.ietf.org/doc/html/rfc1459), [rfc2812](https://datatracker.ietf.org/doc/html/rfc2812) | ✔ | N/A | | |
| IRC TLS Port | [rfc7194](https://datatracker.ietf.org/doc/html/rfc7194) | ✔ | N/A | | |
| IRC CTCP | [irc-ctcp](http://www.alien.net.au/irc/ctcp.txt) | ✔ | N/A | | |
| IRC DCC | [irc-dcc](http://www.irchelp.org/irchelp/rfc/dccspec.html) | ✔ | N/A | | |
| IRC SUPPORT | [irc-00](https://datatracker.ietf.org/doc/html/draft-hardy-irc-isupport-00), [irc-03](https://datatracker.ietf.org/doc/html/draft-brocklesby-irc-isupport-03), [irc-05](http://www.irc.org/tech_docs/005.html) | ✔ | N/A | | **TODO**: What about [ISUPPORT 01](https://datatracker.ietf.org/doc/html/draft-brocklesby-irc-isupport-01) and [ISUPPORT 02](https://datatracker.ietf.org/doc/html/draft-brocklesby-irc-isupport-02)? |
| IRC NAMESX | [irc-namesx](https://docs.inspircd.org/2/modules/namesx/) | ✔ | N/A | | |
| IRC MONITOR | [irc-monitor](https://github.com/atheme/charybdis/blob/master/doc/monitor.txt) | ✔ | N/A | | |
| IRC WATCH | [irc-watch](http://www.stack.nl/~jilles/cgi-bin/hgwebdir.cgi/irc-documentation-jilles/raw-file/tip/reference/draft-meglio-irc-watch-00.txt) | ✔ | N/A | | |
| IRCv3 Capability Negotiation | [ircv3-cap-neg](https://ircv3.net/specs/extensions/capability-negotiation) | ✔ | N/A | | See also the [IRCv3 Support Table](https://ircv3.net/software/clients#desktop-clients) |
| IRCv3 SASL 3.2 | [ircv3-sasl](https://ircv3.net/specs/extensions/sasl-3.2) | ✔ | N/A | | |
| IRCv3 Message Tags | [ircv3-message-tags](https://ircv3.net/specs/extensions/message-tags) | ✔ | N/A | | |
| IRCv3 Echo Message | [ircv3-echo-message](https://ircv3.net/specs/extensions/echo-message-3.2) | ✔ | N/A | | |
| IRCv3 Multi-Prefix | [ircv3-multi-prefix](https://ircv3.net/specs/extensions/multi-prefix-3.1) | ✔ | N/A | | |
| IRCv3 Server Time | [ircv3-server-time](https://ircv3.net/specs/extensions/server-time-3.2) | ✔ | N/A | | |
| XMPP | [rfc3920](https://datatracker.ietf.org/doc/rfc3920), [rfc3921](https://datatracker.ietf.org/doc/rfc3921), [rfc6120](https://datatracker.ietf.org/doc/rfc6120), [rfc6121](https://datatracker.ietf.org/doc/rfc6121) | ✔ | N/A | | |
| XEP-0030 | [xep-0030](https://xmpp.org/extensions/xep-0030.html) | ✔ | N/A | | |
| XEP-0045 | [xep-0045](https://xmpp.org/extensions/xep-0045.html) | ✔ | N/A | | |
| XEP-0054 | [xep-0054](https://xmpp.org/extensions/xep-0054.html) | ✔ | N/A | | |
| XEP-0059 | [xep-0059](https://xmpp.org/extensions/xep-0059.html) | ✔ | N/A | | |
| XEP-0078 | [xep-0078](https://xmpp.org/extensions/xep-0078.html) | ✔ | N/A | | |
| XEP-0085 | [xep-0085](https://xmpp.org/extensions/xep-0085.html) | ✔ | N/A | | Typing notifications |
| XEP-0092 | [xep-0092](https://xmpp.org/extensions/xep-0092.html) | ✔ | N/A | | |
| XEP-0199 | [xep-0199](https://xmpp.org/extensions/xep-0199.html) | ✔ | N/A | | |
| XEP-0203 | [xep-0203](https://xmpp.org/extensions/xep-0203.html) | ✔ | N/A | | |
| XEP-0245 | [xep-0245](https://xmpp.org/extensions/xep-0245.html) | ✔ | N/A | | |
| XEP-0249 | [xep-0249](https://xmpp.org/extensions/xep-0249.html) | ✔ | N/A | | |
| XEP-0280 | [xep-0280](https://xmpp.org/extensions/xep-0280.html) | ✔ | N/A | | |
| XEP-xxxx MUC Avatars | [muc-avatars](https://xmpp.org/extensions/inbox/muc-avatars.html) | ✔ | N/A | | |
| Matrix | [matrix](https://spec.matrix.org/latest/client-server-api/) | ✔ | N/A | Thunderbird is an [Ecosystem Member](https://matrix.org/support/) of the Matrix Foundation | UI only partially supports the full body of the specificaiton, not tracking on an MSC basis at this time |
| Olm/Megolm | [olm](https://gitlab.matrix.org/matrix-org/olm/-/blob/master/docs/olm.md), [megolm](https://gitlab.matrix.org/matrix-org/olm/-/blob/master/docs/megolm.md) | ✔ | N/A | | |
| OTR | [otr-3-1-0](https://otr.cypherpunks.ca/Protocol-v2-3.1.0.html), [otr-4-1-1](https://otr.cypherpunks.ca/Protocol-v3-4.1.1.html) | ✔ | N/A | | |