From 9c39dfc763c1bfd9598a2fbb76cafd97977275e2 Mon Sep 17 00:00:00 2001
From: Zhang Huangbin <Zhang Huangbin@localhost>
Date: Sun, 12 Mar 2017 19:46:26 +0800
Subject: [PATCH] Make sure apache module 'headers' are enabled.

---
 en_US/upgrade/0-upgrade.iredmail.0.9.5.1-0.9.6.md | 6 ++++++
 html/upgrade.iredmail.0.9.5.1-0.9.6.html          | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/en_US/upgrade/0-upgrade.iredmail.0.9.5.1-0.9.6.md b/en_US/upgrade/0-upgrade.iredmail.0.9.5.1-0.9.6.md
index 97c27e9e..8631d47f 100644
--- a/en_US/upgrade/0-upgrade.iredmail.0.9.5.1-0.9.6.md
+++ b/en_US/upgrade/0-upgrade.iredmail.0.9.5.1-0.9.6.md
@@ -61,6 +61,12 @@ Please append setting below in Apache config file:
 RequestHeader unset Proxy early
 ```
 
+* On Debian/Ubuntu, please make sure Apache module `headers` are enabled:
+
+```
+a2enmod headers
+```
+
 Restarting Apache service is required.
 
 #### Nginx
diff --git a/html/upgrade.iredmail.0.9.5.1-0.9.6.html b/html/upgrade.iredmail.0.9.5.1-0.9.6.html
index 768aae38..9544fdc2 100644
--- a/html/upgrade.iredmail.0.9.5.1-0.9.6.html
+++ b/html/upgrade.iredmail.0.9.5.1-0.9.6.html
@@ -108,6 +108,12 @@ latest stable release immediately: <a href="https://github.com/roundcube/roundcu
 <pre><code>RequestHeader unset Proxy early
 </code></pre>
 
+<ul>
+<li>On Debian/Ubuntu, please make sure Apache module <code>headers</code> are enabled:</li>
+</ul>
+<pre><code>a2enmod headers
+</code></pre>
+
 <p>Restarting Apache service is required.</p>
 <h4 id="nginx">Nginx</h4>
 <p>Please open all files under below directories which contains <code>fastcgi_pass</code>