require 'MaiSmtp.class.php';
$smtp_server = 'smtp.163.com';
$smtp_port = 25;
$email = '你的邮件地址';
$password = '密码';
$name = '陶雨';
$to = '接收人邮箱';
$Mail = new MaiSmtp("{$smtp_server}:{$smtp_port}", "{$name}:{$email}", $password);
if($Mail->send('测试:标题', 'MaiSmtp发送测试:内容
', $to)){
echo "发送成功";
}else{
echo "发送失败";
}