update

MailServerInstall.md

@@ -263,7 +263,9 @@ Editer `/etc/courier/authmysqlrc`
 root@serveur:~# vim /etc/courier/authmysqlrc
 ```
 
-Modifier `MYSQL_USERNAME`
+Modifier 
+```text
+         `MYSQL_USERNAME`
          `MYSQL_PASSWORD`
          `MYSQL_DATABASE` -> postfix
          `MYSQL_USER_TABLE` -> comptes
@@ -272,6 +274,7 @@ Modifier `MYSQL_USERNAME`
          `MYSQL_GID_FIELD` -> 5000
          `MYSQL_LOGIN_FIELD` -> email
          `MYSQL_HOME_FIELD` -> "/var/spool/vmail"
+```         
          
 Commenter `MYSQL_NAME_FIELD`