diff --git a/html/install.iredmail.on.debian.ubuntu.html b/html/install.iredmail.on.debian.ubuntu.html
index b005610b..ea907e76 100644
--- a/html/install.iredmail.on.debian.ubuntu.html
+++ b/html/install.iredmail.on.debian.ubuntu.html
@@ -32,17 +32,15 @@
 </ul>
 </div>
 <h2 id="system-requirements">System Requirements</h2>
-<blockquote>
-<p><strong>WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
+<p><strong>IMPORTANT WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
 which means your server does <strong>NOT</strong> have mail related components installed,
 e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
 and configure them for you automatically. Otherwise it may override your
 existing files/configurations althought it will backup files before modifing,
 and it may be not working as expected.</p>
-</blockquote>
 <p>To install iRedMail on Debian or Ubuntu Linux, you need:</p>
 <ul>
-<li>A FRESH, working Debian/Ubuntu Linux. Supported releases are listed on
+<li>A <strong>FRESH</strong>, working Debian/Ubuntu Linux. Supported releases are listed on
   <a href="../download.html">Download</a> page.</li>
 <li>At least <code>1 GB</code> of memory is required for low traffic production server.
   Spam/Virus scanning will take most system resource.</li>
diff --git a/html/install.iredmail.on.freebsd.html b/html/install.iredmail.on.freebsd.html
index 6e0a54a5..b74b6dea 100644
--- a/html/install.iredmail.on.freebsd.html
+++ b/html/install.iredmail.on.freebsd.html
@@ -38,17 +38,15 @@ this installation guide instead:
 <a href="http://www.iredmail.org/wiki/index.php?title=Install/iRedMail/FreeBSD.Jail">Install iRedMail inside FreeBSD Jail (with ezjail)</a></p>
 </blockquote>
 <h2 id="system-requirements">System Requirements</h2>
-<blockquote>
-<p><strong>WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
+<p><strong>IMPORTANT WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
 which means your server does <strong>NOT</strong> have mail related components installed,
 e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
 and configure them for you automatically. Otherwise it may override your
 existing files/configurations althought it will backup files before modifing,
 and it may be not working as expected.</p>
-</blockquote>
 <p>To install iRedMail on FreeBSD, you need:</p>
 <ul>
-<li>A FRESH, minimal, working FreeBSD system, no addition ports or binary
+<li>A <strong>FRESH</strong>, minimal, working FreeBSD system, no addition ports or binary
   packages were installed. Supported releases are listed on
   <a href="../download.html">Download</a> page.</li>
 <li>At least <code>1 GB</code> of memory is required for low traffic production server.
diff --git a/html/install.iredmail.on.openbsd.html b/html/install.iredmail.on.openbsd.html
index ec065f9e..6c7b17d1 100644
--- a/html/install.iredmail.on.openbsd.html
+++ b/html/install.iredmail.on.openbsd.html
@@ -32,17 +32,15 @@
 </ul>
 </div>
 <h2 id="system-requirements">System Requirements</h2>
-<blockquote>
-<p><strong>WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
+<p><strong>IMPORTANT WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
 which means your server does <strong>NOT</strong> have mail related components installed,
 e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
 and configure them for you automatically. Otherwise it may override your
 existing files/configurations althought it will backup files before modifing,
-and it may be not working as expected.</p>
-</blockquote>
-<p>To install iRedMail on OpenBSD, you need:</p>
+and it may be not working as expected.
+To install iRedMail on OpenBSD, you need:</p>
 <ul>
-<li>A FRESH, working OpenBSD system. Supported releases are listed on
+<li>A <strong>FRESH</strong>, working OpenBSD system. Supported releases are listed on
   <a href="../download.html">Download</a> page.</li>
 <li>At least <code>1 GB</code> of memory is required for low traffic production server.
   Spam/Virus scanning will take most system resource.</li>
diff --git a/html/install.iredmail.on.rhel.html b/html/install.iredmail.on.rhel.html
index cd0f3736..d63b92b7 100644
--- a/html/install.iredmail.on.rhel.html
+++ b/html/install.iredmail.on.rhel.html
@@ -32,17 +32,15 @@
 </ul>
 </div>
 <h2 id="system-requirements">System Requirements</h2>
-<blockquote>
-<p><strong>WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
+<p><strong>IMPORTANT WARNING</strong>: iRedMail is designed to be deployed on a FRESH server system,
 which means your server does <strong>NOT</strong> have mail related components installed,
 e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
 and configure them for you automatically. Otherwise it may override your
 existing files/configurations althought it will backup files before modifing,
 and it may be not working as expected.</p>
-</blockquote>
 <p>To install iRedMail on RHEL or CentOS Linux, you need:</p>
 <ul>
-<li>A FRESH, working RHEL or CentOS system. Supported releases are listed on
+<li>A <strong>FRESH</strong>, working RHEL or CentOS system. Supported releases are listed on
   <a href="../download.html">Download</a> page.</li>
 <li>At least <code>1 GB</code> of memory is required for low traffic production server.
   Spam/Virus scanning will take most system resource.</li>
diff --git a/installation/0-install.iredmail.on.rhel.md b/installation/0-install.iredmail.on.rhel.md
index f64fd45c..793d575f 100644
--- a/installation/0-install.iredmail.on.rhel.md
+++ b/installation/0-install.iredmail.on.rhel.md
@@ -4,16 +4,16 @@
 
 ## System Requirements
 
-> __WARNING__: iRedMail is designed to be deployed on a FRESH server system,
-> which means your server does __NOT__ have mail related components installed,
-> e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
-> and configure them for you automatically. Otherwise it may override your
-> existing files/configurations althought it will backup files before modifing,
-> and it may be not working as expected.
+__IMPORTANT WARNING__: iRedMail is designed to be deployed on a FRESH server system,
+which means your server does __NOT__ have mail related components installed,
+e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
+and configure them for you automatically. Otherwise it may override your
+existing files/configurations althought it will backup files before modifing,
+and it may be not working as expected.
 
 To install iRedMail on RHEL or CentOS Linux, you need:
 
-* A FRESH, working RHEL or CentOS system. Supported releases are listed on
+* A __FRESH__, working RHEL or CentOS system. Supported releases are listed on
   [Download](../download.html) page.
 * At least `1 GB` of memory is required for low traffic production server.
   Spam/Virus scanning will take most system resource.
diff --git a/installation/1-install.iredmail.on.debian.ubuntu.md b/installation/1-install.iredmail.on.debian.ubuntu.md
index b7f3bb32..9e31d470 100644
--- a/installation/1-install.iredmail.on.debian.ubuntu.md
+++ b/installation/1-install.iredmail.on.debian.ubuntu.md
@@ -4,16 +4,16 @@
 
 ## System Requirements
 
-> __WARNING__: iRedMail is designed to be deployed on a FRESH server system,
-> which means your server does __NOT__ have mail related components installed,
-> e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
-> and configure them for you automatically. Otherwise it may override your
-> existing files/configurations althought it will backup files before modifing,
-> and it may be not working as expected.
+__IMPORTANT WARNING__: iRedMail is designed to be deployed on a FRESH server system,
+which means your server does __NOT__ have mail related components installed,
+e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
+and configure them for you automatically. Otherwise it may override your
+existing files/configurations althought it will backup files before modifing,
+and it may be not working as expected.
 
 To install iRedMail on Debian or Ubuntu Linux, you need:
 
-* A FRESH, working Debian/Ubuntu Linux. Supported releases are listed on
+* A __FRESH__, working Debian/Ubuntu Linux. Supported releases are listed on
   [Download](../download.html) page.
 * At least `1 GB` of memory is required for low traffic production server.
   Spam/Virus scanning will take most system resource.
diff --git a/installation/2-install.iredmail.on.freebsd.md b/installation/2-install.iredmail.on.freebsd.md
index f0e18b73..5c733edb 100644
--- a/installation/2-install.iredmail.on.freebsd.md
+++ b/installation/2-install.iredmail.on.freebsd.md
@@ -8,16 +8,16 @@
 
 ## System Requirements
 
-> __WARNING__: iRedMail is designed to be deployed on a FRESH server system,
-> which means your server does __NOT__ have mail related components installed,
-> e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
-> and configure them for you automatically. Otherwise it may override your
-> existing files/configurations althought it will backup files before modifing,
-> and it may be not working as expected.
+__IMPORTANT WARNING__: iRedMail is designed to be deployed on a FRESH server system,
+which means your server does __NOT__ have mail related components installed,
+e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
+and configure them for you automatically. Otherwise it may override your
+existing files/configurations althought it will backup files before modifing,
+and it may be not working as expected.
 
 To install iRedMail on FreeBSD, you need:
 
-* A FRESH, minimal, working FreeBSD system, no addition ports or binary
+* A __FRESH__, minimal, working FreeBSD system, no addition ports or binary
   packages were installed. Supported releases are listed on
   [Download](../download.html) page.
 * At least `1 GB` of memory is required for low traffic production server.
diff --git a/installation/3-install.iredmail.on.openbsd.md b/installation/3-install.iredmail.on.openbsd.md
index d2a2417b..42bc51c1 100644
--- a/installation/3-install.iredmail.on.openbsd.md
+++ b/installation/3-install.iredmail.on.openbsd.md
@@ -4,16 +4,15 @@
 
 ## System Requirements
 
-> __WARNING__: iRedMail is designed to be deployed on a FRESH server system,
-> which means your server does __NOT__ have mail related components installed,
-> e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
-> and configure them for you automatically. Otherwise it may override your
-> existing files/configurations althought it will backup files before modifing,
-> and it may be not working as expected.
-
+__IMPORTANT WARNING__: iRedMail is designed to be deployed on a FRESH server system,
+which means your server does __NOT__ have mail related components installed,
+e.g. MySQL, OpenLDAP, Postfix, Dovecot, Amavisd, etc. iRedMail will install
+and configure them for you automatically. Otherwise it may override your
+existing files/configurations althought it will backup files before modifing,
+and it may be not working as expected.
 To install iRedMail on OpenBSD, you need:
 
-* A FRESH, working OpenBSD system. Supported releases are listed on
+* A __FRESH__, working OpenBSD system. Supported releases are listed on
   [Download](../download.html) page.
 * At least `1 GB` of memory is required for low traffic production server.
   Spam/Virus scanning will take most system resource.