diff --git a/en_US/migrations/cluebringer.to.iredapd.md b/en_US/migrations/cluebringer.to.iredapd.md
index 56e5fe55..0b43f4cd 100644
--- a/en_US/migrations/cluebringer.to.iredapd.md
+++ b/en_US/migrations/cluebringer.to.iredapd.md
@@ -76,6 +76,33 @@ That's it.
 
 ## After migration
 
+### Enable required plugins, remove old plugins
+
+> Restarting iRedAPD service is required if you changed its config file.
+
+* To enable whitelists, blacklists, greylisting and throttling offered by
+  iRedAPD, please enable plugins `amavisd_wblist`, `greylisting` and `throttle`
+  in iRedAPD config file like below:
+
+```
+# File: /opt/iredapd/settings.py
+
+plugins = [..., 'amavisd_wblist', 'greylisting', 'throttle']
+```
+
+The order of plugin names doesn't matter.
+
+* Several plugins in old iRedAPD have been removed, you should remove them
+  from parameter `plugins =` in iRedAPD config file:
+
+    * ldap_amavisd_block_blacklisted_senders
+    * ldap_recipient_restrictions
+    * sql_user_restrictions
+    * amavisd_message_size_limit
+
+    First 3 plugins are replaced by `amavisd_wblist', last one is replaced by
+    plugin `throttle`.
+
 ### Disable Cluebringer in Postfix
 
 After migrated to iRedAPD, we need to update Postfix config file
diff --git a/html/cluebringer.to.iredapd.html b/html/cluebringer.to.iredapd.html
index 2aa790d1..8ae3604e 100644
--- a/html/cluebringer.to.iredapd.html
+++ b/html/cluebringer.to.iredapd.html
@@ -21,6 +21,7 @@
 </ul>
 </li>
 <li><a href="#after-migration">After migration</a><ul>
+<li><a href="#enable-required-plugins-remove-old-plugins">Enable required plugins, remove old plugins</a></li>
 <li><a href="#disable-cluebringer-in-postfix">Disable Cluebringer in Postfix</a></li>
 <li><a href="#disable-cluebringer-in-iredadmin-pro">Disable Cluebringer in iRedAdmin-Pro</a></li>
 </ul>
@@ -90,6 +91,35 @@ cluebringer_db_password = ''
 
 <p>That's it.</p>
 <h2 id="after-migration">After migration</h2>
+<h3 id="enable-required-plugins-remove-old-plugins">Enable required plugins, remove old plugins</h3>
+<blockquote>
+<p>Restarting iRedAPD service is required if you changed its config file.</p>
+</blockquote>
+<ul>
+<li>To enable whitelists, blacklists, greylisting and throttling offered by
+  iRedAPD, please enable plugins <code>amavisd_wblist</code>, <code>greylisting</code> and <code>throttle</code>
+  in iRedAPD config file like below:</li>
+</ul>
+<pre><code># File: /opt/iredapd/settings.py
+
+plugins = [..., 'amavisd_wblist', 'greylisting', 'throttle']
+</code></pre>
+
+<p>The order of plugin names doesn't matter.</p>
+<ul>
+<li>
+<p>Several plugins in old iRedAPD have been removed, you should remove them
+  from parameter <code>plugins =</code> in iRedAPD config file:</p>
+<ul>
+<li>ldap_amavisd_block_blacklisted_senders</li>
+<li>ldap_recipient_restrictions</li>
+<li>sql_user_restrictions</li>
+<li>amavisd_message_size_limit</li>
+</ul>
+<p>First 3 plugins are replaced by <code>amavisd_wblist', last one is replaced by
+plugin</code>throttle`.</p>
+</li>
+</ul>
 <h3 id="disable-cluebringer-in-postfix">Disable Cluebringer in Postfix</h3>
 <p>After migrated to iRedAPD, we need to update Postfix config file
 <code>/etc/postfix/main.cf</code> (Linux) or <code>/usr/local/etc/postfix/main.cf</code> (FreeBSD)