SendMail - Port Problem

I'm getting error msg:

"Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in ..."

Is it the prot number that is wrong? Where/How do I find the correct port number?

Thanks
Michael

 

create a php file called info.php with the following code:

<?php
phpinfo();
?>

Code (markup):

upload the file to your server and execute it as: http://www.yourwebsite.com/info.php

Look for SMTP Port info...

 

Thanks for your help. However, the result shows:

SMTP localhost
smtp_port 25

It looks to me as if this is info obtained from the php.ini file.
Is this just a logical port? Does it exist on my computer?

By the way, I'm developing my site on my local computer under XAMPP Appache & MySQL.

So what do I do now? I'm lost! Have no idea where to go / what to do.

Would appreciate mor help.
Thanks