diff --git a/TODO.md b/TODO.md
new file mode 100644
index 00000000..0e97698d
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1 @@
+* How to block attachment with Amavisd
diff --git a/en_US/faq/1-errors.md b/en_US/faq/1-errors.md
index 8cd2632e..5445f2ff 100644
--- a/en_US/faq/1-errors.md
+++ b/en_US/faq/1-errors.md
@@ -41,14 +41,16 @@ Check [manual page of Postfix configuration file](http://www.postfix.org/postcon
 Removing `reject_sender_login_mismatch` and restarting Postfix service fixes
 this issue.
 
-> If you want to allow some users to send as other users, or allow all users
-> to send as their alias addresses, or allow member of mail list/alias to send
-> as mail list/alias, you should try iRedAPD plugin `reject_sender_login_mismatch`
-> instead (requires iRedAPD-1.4.4 or later releases).
->
-> Read comments in file `/opt/iredapd/plugins/reject_sender_login_mismatch.py`,
-> then enable it in iRedAPD config file `/opt/iredapd/settings.py` (`plugins = `),
-> restart iRedAPD service. That's all.
+!!! note
+
+    If you want to allow some users to send as other users, or allow all users
+    to send as their alias addresses, or allow member of mail list/alias to send
+    as mail list/alias, you should try iRedAPD plugin `reject_sender_login_mismatch`
+    instead (requires iRedAPD-1.4.4 or later releases).
+
+    Read comments in file `/opt/iredapd/plugins/reject_sender_login_mismatch.py`,
+    then enable it in iRedAPD config file `/opt/iredapd/settings.py` (`plugins = `),
+    restart iRedAPD service. That's all.
 
 ### unreasonable virtual_alias_maps map expansion size for user@domain.com
 
diff --git a/html/errors.html b/html/errors.html
index 644ec665..718f1484 100644
--- a/html/errors.html
+++ b/html/errors.html
@@ -56,7 +56,8 @@ login name doesn't own the MAIL FROM address according to $smtpd_sender_login_ma
 Check <a href="http://www.postfix.org/postconf.5.html#reject_sender_login_mismatch">manual page of Postfix configuration file</a> for more details.</p>
 <p>Removing <code>reject_sender_login_mismatch</code> and restarting Postfix service fixes
 this issue.</p>
-<blockquote>
+<div class="admonition note">
+<p class="admonition-title">Note</p>
 <p>If you want to allow some users to send as other users, or allow all users
 to send as their alias addresses, or allow member of mail list/alias to send
 as mail list/alias, you should try iRedAPD plugin <code>reject_sender_login_mismatch</code>
@@ -64,7 +65,7 @@ instead (requires iRedAPD-1.4.4 or later releases).</p>
 <p>Read comments in file <code>/opt/iredapd/plugins/reject_sender_login_mismatch.py</code>,
 then enable it in iRedAPD config file <code>/opt/iredapd/settings.py</code> (<code>plugins =</code>),
 restart iRedAPD service. That's all.</p>
-</blockquote>
+</div>
 <h3 id="unreasonable-virtual_alias_maps-map-expansion-size-for-userdomaincom">unreasonable virtual_alias_maps map expansion size for user@domain.com</h3>
 <p>Sample error message in Postfix log file:</p>
 <blockquote>