diff --git a/acme.sh b/acme.sh
index 27bc4fb3..2cc16829 100755
--- a/acme.sh
+++ b/acme.sh
@@ -5087,6 +5087,13 @@ _process() {
             _err "'$_dvalue' is not a valid domain for parameter '$1'"
             return 1
           fi
+
+          _sepexis="$(echo "$_dvalue" | grep ",")"
+          if [ "$_sepexis" ]; then
+            _err "'$_dvalue' is not a valid domain for parameter '$1', please use more command to add domains"
+            return 1
+          fi
+
           if _is_idn "$_dvalue" && ! _exists idn; then
             _err "It seems that $_dvalue is an IDN( Internationalized Domain Names), please install 'idn' command first."
             return 1