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# Chat, VoIP and social network with <img src="/images/XMPP_logo.png" width=100>
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By default, YunoHost comes installed with an instant messaging server called Metronome which implements the [XMPP protocol ](https://en.wikipedia.org/wiki/Extensible_Messaging_and_Presence_Protocol ) (previously known as Jabber).
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This protocol is already used by millions of people around the world—it is an open protocol.
All applications based on XMPP are compatible with each other: When using an XMPP client, you can interact with anybody who has an XMPP account.
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XMPP is an extensible protocol—this means users can configure "extensions" to chatrooms, share messages and files, and make voice and video calls using XMPP.
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## XMPP account
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To use an XMPP account you need a username, in the format: `user@domain.tld` , and a password.
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With YunoHost, an XMPP account is created for all YunoHost users automatically.
The XMPP account credentials corresponds to the user's main e-mail address and password.
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## Connecting to your YunoHost XMPP account
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You can connect to your YunoHost XMPP account in different ways.
### Web clients
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- [Movim ](https://movim.eu )
- [ConverseJS ](https://conversejs.org/ )
- [Libervia/Salut à Toi ](https://salut-a-toi.org/ )
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### Desktop clients
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- [Gajim ](https://gajim.org/ ) (Linux, Windows)
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- [Dino ](https://dino.im ) (Linux)
- [Thunderbird ](https://www.thunderbird.net/fr/ ) (multiplatform)
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- [Beagle IM ](https://beagle.im/ ) (macOS)
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- [Profanity ](https://profanity-im.github.io/ ) (Linux)
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### Mobile clients
- [Conversations ](https://conversations.im/ ) (Android)
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- [Xabber ](https://xabber.com ) (Android)
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- [Movim ](https://movim.eu ) (Android)
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- [ChatSecure] (https://chatsecure.org/) (iOS)
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- [Monal ](https://monal.im/ ) (iOS)
- [Siskin IM ](https://siskin.im/ ) (iOS)
- [Kaidan ](https://www.kaidan.im/ ) (Ubuntu Touch / Plasma Mobile)
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Here is an exhaustive list of XMPP clients: https://xmpp.org/software/clients.html
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## Encrypt conversations with OMEMO
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XMPP chats can be made secure and private using [OMEMO encryption ](https://xmpp.org/extensions/xep-0384.html ), for instance using Gajim:
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- Install `gajim` and the plugin `gajim-omemo` .
- Turn on the plugin in `Tools > Plugins` .
- Turn on the encryption in the chat with somebody who also has OMEMO.
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## Chatrooms
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To create a chatroom (multi-user chat) on your YunoHost server, use the identifier `chatroomname@muc.yourdomain.tld` .
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For this to work you need to [add the corresponding `muc.` DNS record ](/dns_config ) in the DNS configuration.
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## VoIP and videoconferences
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A practical tool to call an XMPP client, either with voice or voice+video, is to use the [Jitsi ](https://jitsi.org/ ) client.
