It fails on hotmail.com; my script has problems there as well (and with
couple others, the cure seems to be adding delays between the lines sent
to the server; it makes the program slow, but more reliable).
In my case I added "-i 3" to the netcat options. Isn't a panacea, but
helped in most cases. In the rest, I have to resort to telnet.
Thanks a lot. Seems I have to learn perl. Looks powerful.
On Thu, 8 Jul 2004, Justin wrote:
> On 2004-07-08T17:50:57+0200, Thomas Shaddack wrote:
> > I cobbled up together a small bash shell script that does this. It lists
> > the MX records for a domain, and then tries to connect to each of them,
> > issue an EHLO command, disconnect, then list the output of the server,
> ..
>
> Or, in perl... though I wonder if there's a way to get capabilities with
> Net::SMTP. Might make this cleaner.
>
>
> #!/usr/bin/perl
>
> use IO::Socket;
> use Net::DNS;
>
> for ($i = 0; $i <= $#ARGV; $i++) {
> my @mx = mx($ARGV[$i]);
> foreach $record (@mx) {
> my $hastls = 0;
> my $mhost = IO::Socket::INET->new (
> Proto => "tcp",
> PeerAddr => $record->exchange,
> PeerPort => "25",
> Timeout => "10"
> );
> print $mhost "EHLO I-love-my-country.whitehouse.gov\n";
> print $mhost "QUIT\n";
> while (<$mhost>) {
> if (/STARTTLS/) {
> $hastls = 1;
> last;
> }
> }
> print "$ARGV[$i] " . $record->preference . " " . $record->exchange;
> print $hastls ? " adv-tls\n" : " no-tls\n";
> close $mhost;
> }
> }
>
