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299 lines
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<ol class="chapter"><li class="chapter-item expanded affix "><li class="part-title">Introduction</li><li class="chapter-item expanded "><a href="welcome_and_overview.html">Welcome and Overview</a></li><li class="chapter-item expanded affix "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="setup/installation.html">Installation</a></li><li class="chapter-item expanded "><a href="postgres.html">Using Postgres</a></li><li class="chapter-item expanded "><a href="reverse_proxy.html">Configuring a Reverse Proxy</a></li><li class="chapter-item expanded "><a href="setup/forward_proxy.html">Configuring a Forward/Outbound Proxy</a></li><li class="chapter-item expanded "><a href="turn-howto.html">Configuring a Turn Server</a></li><li class="chapter-item expanded "><a href="delegate.html">Delegation</a></li><li class="chapter-item expanded affix "><li class="part-title">Upgrading</li><li class="chapter-item expanded "><a href="upgrade.html">Upgrading between Synapse Versions</a></li><li class="chapter-item expanded "><a href="MSC1711_certificates_FAQ.html">Upgrading from pre-Synapse 1.0</a></li><li class="chapter-item expanded affix "><li class="part-title">Usage</li><li class="chapter-item expanded "><a href="federate.html">Federation</a></li><li class="chapter-item expanded "><a href="usage/configuration/index.html">Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="usage/configuration/homeserver_sample_config.html">Homeserver Sample Config File</a></li><li class="chapter-item expanded "><a href="usage/configuration/logging_sample_config.html">Logging Sample Config File</a></li><li class="chapter-item expanded "><a href="structured_logging.html">Structured Logging</a></li><li class="chapter-item expanded "><a href="templates.html">Templates</a></li><li class="chapter-item expanded "><a href="usage/configuration/user_authentication/index.html">User Authentication</a></li><li><ol class="section"><li class="chapter-item expanded "><div>Single-Sign On</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="openid.html">OpenID Connect</a></li><li class="chapter-item expanded "><div>SAML</div></li><li class="chapter-item expanded "><div>CAS</div></li><li class="chapter-item expanded "><a href="sso_mapping_providers.html">SSO Mapping Providers</a></li></ol></li><li class="chapter-item expanded "><a href="password_auth_providers.html">Password Auth Providers</a></li><li class="chapter-item expanded "><a href="jwt.html">JSON Web Tokens</a></li></ol></li><li class="chapter-item expanded "><a href="CAPTCHA_SETUP.html">Registration Captcha</a></li><li class="chapter-item expanded "><a href="application_services.html">Application Services</a></li><li class="chapter-item expanded "><a href="server_notices.html" class="active">Server Notices</a></li><li class="chapter-item expanded "><a href="consent_tracking.html">Consent Tracking</a></li><li class="chapter-item expanded "><a href="url_previews.html">URL Previews</a></li><li class="chapter-item expanded "><a href="user_directory.html">User Directory</a></li><li class="chapter-item expanded "><a href="message_retention_policies.html">Message Retention Policies</a></li><li class="chapter-item expanded "><a href="modules.html">Pluggable Modules</a></li><li><ol class="section"><li class="chapter-item expanded "><div>Third Party Rules</div></li><li class="chapter-item expanded "><a href="spam_checker.html">Spam Checker</a></li><li class="chapter-item expanded "><a href="presence_router_module.html">Presence Router</a></li><li class="chapter-item expanded "><div>Media Storage Providers</div></li></ol></li><li class="chapter-item expanded "><a href="workers.html">Workers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="synctl_workers.html">Using synctl with Workers</a></li><li class="chapter-item expanded "><a href="systemd-with-workers/index.html">Systemd</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="usage/administration/index.html">Administrat
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<h1 id="server-notices"><a class="header" href="#server-notices">Server Notices</a></h1>
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<p>'Server Notices' are a new feature introduced in Synapse 0.30. They provide a
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channel whereby server administrators can send messages to users on the server.</p>
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<p>They are used as part of communication of the server polices (see
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<a href="consent_tracking.html">Consent Tracking</a>), however the intention is that
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they may also find a use for features such as "Message of the day".</p>
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<p>This is a feature specific to Synapse, but it uses standard Matrix
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communication mechanisms, so should work with any Matrix client.</p>
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<h2 id="user-experience"><a class="header" href="#user-experience">User experience</a></h2>
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<p>When the user is first sent a server notice, they will get an invitation to a
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room (typically called 'Server Notices', though this is configurable in
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<code>homeserver.yaml</code>). They will be <strong>unable to reject</strong> this invitation -
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attempts to do so will receive an error.</p>
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<p>Once they accept the invitation, they will see the notice message in the room
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history; it will appear to have come from the 'server notices user' (see
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below).</p>
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<p>The user is prevented from sending any messages in this room by the power
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levels.</p>
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<p>Having joined the room, the user can leave the room if they want. Subsequent
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server notices will then cause a new room to be created.</p>
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<h2 id="synapse-configuration"><a class="header" href="#synapse-configuration">Synapse configuration</a></h2>
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<p>Server notices come from a specific user id on the server. Server
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administrators are free to choose the user id - something like <code>server</code> is
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suggested, meaning the notices will come from
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<code>@server:<your_server_name></code>. Once the Server Notices user is configured, that
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user id becomes a special, privileged user, so administrators should ensure
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that <strong>it is not already allocated</strong>.</p>
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<p>In order to support server notices, it is necessary to add some configuration
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to the <code>homeserver.yaml</code> file. In particular, you should add a <code>server_notices</code>
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section, which should look like this:</p>
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<pre><code class="language-yaml">server_notices:
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system_mxid_localpart: server
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system_mxid_display_name: "Server Notices"
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system_mxid_avatar_url: "mxc://server.com/oumMVlgDnLYFaPVkExemNVVZ"
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room_name: "Server Notices"
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</code></pre>
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<p>The only compulsory setting is <code>system_mxid_localpart</code>, which defines the user
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id of the Server Notices user, as above. <code>room_name</code> defines the name of the
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room which will be created.</p>
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<p><code>system_mxid_display_name</code> and <code>system_mxid_avatar_url</code> can be used to set the
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displayname and avatar of the Server Notices user.</p>
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<h2 id="sending-notices"><a class="header" href="#sending-notices">Sending notices</a></h2>
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<p>To send server notices to users you can use the
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<a href="admin_api/server_notices.html">admin_api</a>.</p>
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