Telnet Port 25 to Check TLS

[Amy Adams]

Hello,
I am trying to set up , rather I have setup the TLS for the mails which are incoming and for this I have used the Red Condor as a mail gateway and the SMTP connector, which is implemented on my Exchange 2003 server. My problem is the when I try to use the Telnet service on by Ip, it is not working. I need something to check TLS with the Telnet port 23. I guess someone should have an answer to this. Any help on this is appreciated. Thanks in advance.

[NetWorkInG]

Hello,
If I am not wrong then most of the firewalls are set to allow the port 25. That is most of them are pre configured to allow the TLS/SSl on port number 25. If you are not sure that this is configured properly then you should consult to your firewall vendor, from where you have purchased or configured the firewall setting. First see that the traffic of the TLS/SSL are redirected to the port 25, if this is the setting then you can communicate properly.

[GlassFish]

Hello,
For modifing the telnet script to work as you need it, I have a script with me.
Here is the code

#! /usr/bin/perl

use Net::Telnet(); 
$chc = new Net::Telnet (Telnetmode => 0);
$chc->open(Host => $ARGV[0],
           port => 25);

$chc->waitfor('/220/');
$chc->print("ehlo test");
$chc->waitfor('/STARTTLS/');
$ln = $chc->getline;
print "$ln\n";

[NetworkeR]

Hello,
You can check if the mail server is capable for TLS or not
Take a look here

CMD: telnet mail.example.com 25
220 mail77-red.bigfish.com ESMTP Postfix EGGS and Butter
CMD: ehlo test
250-mail77-red.example.com
250-PIPELINING
250-SIZE 150000000
250-ETRN
250-STARTTLS
250 8BITMIME
CMD: starttls
220 Ready to start TLS

The "220 Ready to start TLS" indicates that the server is ready to start a TLS connection.

[cyber-noob]

Hello,
I think you should first check that your mail server has a TLS/SSL protocol stack installed or not. If you have not installed this then please install it and then try to send a mail. If you have a latest version of the operating system, then if I am not wrong it is installed by default, but only on the latest version of the operating system, if you are using an old operating system, then you will have to install it manually. Just install it and if you have problems regarding this post back.