$mail->From = "
[email protected]
"; //必填,发件人Email
$mail->FromName = "Webmaster"; //必填,发件人昵称或姓名
$mail->Subject = "This is the subject"; //必填,邮件标题(主题)
$mail->AltBody = "This is the body when user views in plain text format"; //可选,纯文本形势下用户看到的内容
$mail->WordWrap = 50; // 自动换行的字数