php 使用身份验证的SMTP发送电子邮件
这个例子说明如何发送电子邮件使用SMTP身份验证。此特定示例使用Gmail发送。为通过SMTP发送如需Gmail要求的SMTP TLS身份验证。幸运的是，当我们使用梨邮件认证，连接自动TLS的。
这个例子之间的区别，只是在前面的示例使用SMTP是增加以下SMTP参数。
$smtp_params["auth"] = true; $smtp_params["username"] = "user@gmail.com"; $smtp_params["password"] = "pass";
<?
include('Mail.php');
include('Mail/mime.php');
// Constructing the email
$sender = "user@gmail.com"; // Your email address
$recipient = "Leigh <leigh@no_spam.net>"; // The Recipients name and email address
$subject = "Test Email"; // Subject for the email
$text = 'This is a text message.'; // Text version of the email
$html = '<html><body><p>This is a html message</p></body></html>'; // HTML version of the email
$crlf = "n";
$headers = array(
'From' => $sender,
'Return-Path' => $sender,
'Subject' => $subject
);
// Creating the Mime message
$mime = new Mail_mime($crlf);
// Setting the body of the email
$mime->setTXTBody($text);
$mime->setHTMLBody($html);
// Add an attachment
$file = "Hello World!";
$file_name = "Hello text.txt";
$content_type = "text/plain";
$mime->addAttachment ($file, $content_type, $file_name, 0);
// Set body and headers ready for base mail class
$body = $mime->get();
$headers = $mime->headers($headers);
// SMTP authentication params
$smtp_params["host"] = "smtp.gmail.com";
$smtp_params["port"] = "25";
$smtp_params["auth"] = true;
$smtp_params["username"] = "user@gmail.com";
$smtp_params["password"] = "pass";
// Sending the email using smtp
$mail =& Mail::factory("smtp", $smtp_params);
$result = $mail->send($recipient, $headers, $body);
if($result === 1)
{
echo("Your message has been sent!");
}
else
{
echo("Your message was not sent: " . $result);
}
?>
补充：Php教程,邮件处理 
