The below script may be useful to test the mail delivery using email authentication with and without SSL

Note:
The script uses pear Mail function, so make sure that PEAR Mail function is installed on your server.

Don’t forget to change the fields as needed …

With SSL:

<?php
require_once "Mail.php";
$from = "Sender <[email protected]>";
$to = "Recipient <[email protected]>";
$subject = "Hi!";
$body = "Hi,\n\nHow are you?";
$host = "ssl://mail.remotehost.com";
$port = "465";
$username = "[email protected]";
$password = "PASSWORD";
$headers = array ('From' => $from, 'To' => $to, 'Subject' => $subject);
$smtp = Mail::factory('smtp', array ('host' => $host, 'port' => $port, 'auth' => true, 'username' => $username, 'password' => $password));
$mail = $smtp->send($to, $headers, $body);
if (PEAR::isError($mail))
{
echo("<p>" . $mail->getMessage() . "</p>");
}
else
{
echo("<p>Message successfully sent!</p>");
}
?>

Without SSL:

<?php
require_once "Mail.php";
$from = "Sender <[email protected]>";
$to = "Recipient <[email protected]>";
$subject = "Hi!";
$body = "Hi,\n\nHow are you?";
$host = "mail.remotehost.com";
$port = "25";
$username = "[email protected]";
$password = "PASSWORD";
$headers = array ('From' => $from, 'To' => $to, 'Subject' => $subject);
$smtp = Mail::factory('smtp', array ('host' => $host, 'port' => $port, 'auth' => true, 'username' => $username, 'password' => $password));
$mail = $smtp->send($to, $headers, $body);
if (PEAR::isError($mail))
{
echo("<p>" . $mail->getMessage() . "</p>");
}
else
{
echo("<p>Message successfully sent!</p>");
}
?>