xenial (1) fdnsmxalist.1.gz

NAME

       fdnsmxalist - resolve a list of MX records and their corresponding A records for hostname

SYNOPSIS

       fdnsmxalist [-x] <hostname>

DESCRIPTION

       fdnsmxalist  will  attempt  to  look  up  a  list of MX records for hostname.  If any are found, they are
       printed to standard output separated by newlines in the format:

        Protocol (Priority) hostname:port

       The program then looks up lists of A and AAAA records for each MX record, and  prints  them  to  standard
       output,  one IP per line.  Lines are printed to standard output starting with "ERROR: " if any MX records
       have no corresponding A or AAAA records, are CNAMEs (an RFC violation), or have A or AAAA  records  which
       point to non-routable IP addresses.

       If  the  -x switch is passed on the command line, the program outputs machine-parsable XML instead of the
       human-readable tree.

       Exit codes for the program are:

         0 - Everything looks fine
         1 - An MX has a non-routable IP
         2 - An MX doesn't exist
         3 - An MX is a CNAME
         4 - An MX is an IP address
       100 - Invalid syntax
       103 - DNS timeout or host does not have MX records

AUTHOR

       Ian Gulliver <ian@penguinhosting.net>

SEE ALSO

       libfiredns(3)

                                                   2004-02-12                                     fdnsmxalist(1)