Large Resource

Best way to read and send mails is log into an SMTP server.

Download the latest phpmailer source code and copy it into your server.
And use the below script to send mails using SMTP server.

require_once("phpmailer/class.phpmailer.php");
require_once("phpmailer/class.smtp.php");

function smtp_auth_mail($to, $subject, $message, $headers, $auth = true)
{
	$mail             = new PHPMailer();

	$body             = $message;

	$mail->IsSMTP(); // telling the class to use SMTP
	$mail->Host       = "localhost"; // SMTP server
	$mail->Port       = "465"; // SMTP port
	$mail->SMTPSecure = "ssl"; // SMTP secure

	$mail->From       = "admin@xyz.com";
	$mail->FromName   = "XYZ Admin";

	if ($auth)
	{
		$mail->SMTPAuth	  = true;

		$mail->Username	  = "admin@xyz.com"; // in some servers @ will be replaced with +
		$mail->Password	  = "xyz123";
	}

	$mail->Subject    = $subject;

	$body = str_ireplace("\n", "<br>", $body);

	$mail->MsgHTML($body);

	$mail->AddAddress($to);

	if(!$mail->Send()) {
		if (stripos($mail->ErrorInfo, 'Data not accepted') === false)
			echo "Mailer Error: " . $mail->ErrorInfo;
			return false;
	} else {
	  return true;
	}
}

smtp_auth_mail('xyz@gmail.com', 'Test mail', 'Test mail from XYZ', '');

Finally smtp_auth_mail function will return true after sending the mail successfully otherwise it will return false.