man fdnsmx (Commandes) - resolve an MX record of a hostname
NAME
fdnsmx - resolve an MX record of a hostname
SYNOPSIS
fdnsmx <hostname>
DESCRIPTION
fdnsmx will attempt to look up a single MX record for hostname. If one is found, it is printed to standard output and the program exits with return code 0. If not, nothing is printed and the program exits with return code 1.
AUTHOR
Ian Gulliver <ian@penguinhosting.net>