diff --git a/create_sympa_listdomain.sh b/create_sympa_listdomain.sh
index 5984532..ef1d5fa 100755
--- a/create_sympa_listdomain.sh
+++ b/create_sympa_listdomain.sh
@@ -390,6 +390,27 @@ else
    done
 fi
 
+# - if multiple listmasers where given in a blank separated list, we correct it here
+# -
+echo ""
+echo "SYMPA_LISTMASTER: $SYMPA_LISTMASTER"
+echo ""
+declare -a listmaster_arr=()
+for _listmaster in $SYMPA_LISTMASTER ; do
+   listmaster_arr+=("$_listmaster")
+done
+SYMPA_LISTMASTER=""
+_first=true
+for _listmaster in "${listmaster_arr[@]}" ; do
+   if $_first ; then
+      SYMPA_LISTMASTER="$_listmaster"
+      _first=false
+   else
+      SYMPA_LISTMASTER="${SYMPA_LISTMASTER},$_listmaster"
+   fi
+done
+
+
 if grep -e "^\s*listmaster" $SYMPA_MAIN_CONF_FILE > /dev/null 2>&1 ; then
    _BSP_POSTMASTER_ABUSE_ADDRESS=`grep -e "^\s*listmaster" $SYMPA_MAIN_CONF_FILE 2> /dev/null | awk '{print$2}'`
 elif grep -e "^\s*#\s*listmaster" $SYMPA_MAIN_CONF_FILE > /dev/null 2>&1 ; then