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<h1 id="server-notices"><a class="header" href="#server-notices">Server Notices</a></h1>
<p>'Server Notices' are a new feature introduced in Synapse 0.30. They provide a
channel whereby server administrators can send messages to users on the server.</p>
<p>They are used as part of communication of the server polices (see
<a href="consent_tracking.html">Consent Tracking</a>), however the intention is that
they may also find a use for features such as "Message of the day".</p>
<p>This is a feature specific to Synapse, but it uses standard Matrix
communication mechanisms, so should work with any Matrix client.</p>
<h2 id="user-experience"><a class="header" href="#user-experience">User experience</a></h2>
<p>When the user is first sent a server notice, they will get an invitation to a
room (typically called 'Server Notices', though this is configurable in
<code>homeserver.yaml</code>). They will be <strong>unable to reject</strong> this invitation -
attempts to do so will receive an error.</p>
<p>Once they accept the invitation, they will see the notice message in the room
history; it will appear to have come from the 'server notices user' (see
below).</p>
<p>The user is prevented from sending any messages in this room by the power
levels.</p>
<p>Having joined the room, the user can leave the room if they want. Subsequent
server notices will then cause a new room to be created.</p>
<h2 id="synapse-configuration"><a class="header" href="#synapse-configuration">Synapse configuration</a></h2>
<p>Server notices come from a specific user id on the server. Server
administrators are free to choose the user id - something like <code>server</code> is
suggested, meaning the notices will come from
<code>@server:<your_server_name></code>. Once the Server Notices user is configured, that
user id becomes a special, privileged user, so administrators should ensure
that <strong>it is not already allocated</strong>.</p>
<p>In order to support server notices, it is necessary to add some configuration
to the <code>homeserver.yaml</code> file. In particular, you should add a <code>server_notices</code>
section, which should look like this:</p>
<pre><code class="language-yaml">server_notices:
system_mxid_localpart: server
system_mxid_display_name: "Server Notices"
system_mxid_avatar_url: "mxc://server.com/oumMVlgDnLYFaPVkExemNVVZ"
room_name: "Server Notices"
</code></pre>
<p>The only compulsory setting is <code>system_mxid_localpart</code>, which defines the user
id of the Server Notices user, as above. <code>room_name</code> defines the name of the
room which will be created.</p>
<p><code>system_mxid_display_name</code> and <code>system_mxid_avatar_url</code> can be used to set the
displayname and avatar of the Server Notices user.</p>
<h2 id="sending-notices"><a class="header" href="#sending-notices">Sending notices</a></h2>
<p>To send server notices to users you can use the
<a href="admin_api/server_notices.html">admin_api</a>.</p>
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