45 lines
760 B
Perl
45 lines
760 B
Perl
#!/usr/bin/perl
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# $Id: mx 1815 2020-10-14 21:55:18Z willem $
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=head1 NAME
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mx - Print a domain's MX records
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=head1 SYNOPSIS
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C<mx> I<domain>
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=head1 DESCRIPTION
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C<mx> prints a domain's MX records, sorted by preference.
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=head1 AUTHOR
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Michael Fuhr <mike@fuhr.org>
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=head1 SEE ALSO
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L<perl(1)>, L<axfr>, L<check_soa>, L<check_zone>, L<mresolv>, L<perldig>,
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L<Net::DNS>
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=cut
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use strict;
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use warnings;
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use File::Basename;
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use Net::DNS;
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die "Usage: ", basename($0), " domain\n" unless (@ARGV == 1);
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my $dname = $ARGV[0];
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my $res = Net::DNS::Resolver->new;
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my @mx = mx($res, $dname);
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if (@mx) {
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foreach my $rr (@mx) {
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print $rr->preference, "\t", $rr->exchange, "\n";
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}
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} else {
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print "Can't find MX hosts for $dname: ", $res->errorstring, "\n";
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}
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