diff --git a/01-setup.sh b/01-setup.sh
index eba8ffd..f703f73 100755
--- a/01-setup.sh
+++ b/01-setup.sh
@@ -50,7 +50,7 @@ MYVEMAIL_DOMAIN=${_domain}
 MYVEMAIL_VERSION=${mailver}
 
 # Additional mail domains separated by commas
-MYVEMAIL_ADDMX=${_domain}
+MYVEMAIL_ADDMX=
 
 # Backup mail servers separated by commas
 MYVEMAIL_PRIMARYMX=