switched to validate_domain function

bin/vmail-aliases-add.sh

@@ -41,7 +41,7 @@ if [ -n "$2" ]; then
       elif [ -z $domain ] ; then
         echo "ERROR: No domain in $email."
         exit 1
-      elif [[ ! $domain =~ ^(([a-zA-Z](-?[a-zA-Z0-9])*)\.)+[a-zA-Z]{2,}$ ]] ; then
+      elif ! vmail::validate_domain $domain; then
         echo "ERROR: $domain is not a valid domain name."
         exit 1
       fi