diff --git a/MailServerInstall.md b/MailServerInstall.md
index b53dea4..08c3f19 100644
--- a/MailServerInstall.md
+++ b/MailServerInstall.md
@@ -45,4 +45,16 @@ smtp inet n - - - - smtpd
         ) ENGINE=MyISAM;       
     ~~~~
 
+### Edition des 5 fichiers de configuration suivants:
+* Contenu de (mysql-virtual_domaines.cf)
+    ~~~~text
+        hosts = 127.0.0.1
+        user = postfix
+        password = Mot de passe Mysql Postfix
+        dbname = postfix
+        select_field = 'virtual'
+        table = domaines
+        where_field = domaine
+        additional_conditions = AND etat=1
+    ~~~~