fdnsmx - resolve an MX record of a hostname
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.
Ian Gulliver <firstname.lastname@example.org>
libfiredns(3) 2004-02-12 fdnsmx(1)