add structure to mail sec

Doc/Sdi/mail.xml

@@ -53,7 +53,7 @@
 
     <itemizedlist>
       <listitem>
-        <para>What is an MTA, MDA, MUA and so one</para>
+        <para>What is an MTA, MDA and MUA?</para>
       </listitem>
 
       <listitem>
@@ -92,17 +92,56 @@
     features used in production today.</para>
 
     <section xml:id="sdiMailBlah">
-      <title/>
+      <title>Install and send to local Users</title>
 
-      <para>Before ...</para>
+      <para/>
     </section>
 
     <section xml:id="sdiSectNew">
-      <title/>
+      <title>Authentication Setup</title>
 
       <para>send an <filename>EICAR-TEST-FILE.txt</filename></para>
 
-      <programlisting language="none"/>
+      <programlisting language="none">
+</programlisting>
+
+      <bibliolist>
+        <bibliomixed/>
+      </bibliolist>
+    </section>
+
+    <section>
+      <title>Spam and Virus defense</title>
+
+      <para><itemizedlist>
+          <listitem>
+            <para/>
+          </listitem>
+
+          <listitem>
+            <para/>
+          </listitem>
+        </itemizedlist></para>
+
+      <section>
+        <title>blacklisting and greylisting</title>
+
+        <para/>
+
+        <para/>
+      </section>
+
+      <section>
+        <title>SPF</title>
+
+        <para/>
+      </section>
+
+      <section>
+        <title>Amavis, Clamav and Spamassasin</title>
+
+        <para/>
+      </section>
     </section>
   </section>
 </chapter>