diff --git a/MailServerInstall.md b/MailServerInstall.md
index 84f6b72..9d30b96 100644
--- a/MailServerInstall.md
+++ b/MailServerInstall.md
@@ -47,7 +47,7 @@ smtp inet n - - - - smtpd
 
 ### Edition des 5 fichiers de configuration suivants:
 * Contenu de `mysql-virtual_domaines.cf`
-    ~~~~text
+    ~~~~txt
         hosts = 127.0.0.1
             user = postfix
                 password = Mot de passe Mysql Postfix