php – 如何格式化Hotmail / Outlook满意的电子邮件？

$body = 'This is a test';
    $subject = 'Confirmation';
$headers = 'From: Testing Site' . "\r\n";
$headers .= 'Reply-To: [e-mail]' . "\r\n";
$headers .= 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html;charset=iso-8859-1' . "\r\n";
$headers .= 'X-Mailer: PHP/' . PHPversion(). "\r\n";
$headers .= 'Delivery-Date: ' . date("r") . "\r\n";
//$headers .= 'Message-Id: <[e-mail]>' . "\r\n";

mail("[e-mail]",$subject,$body,$headers,"-f [e-mail]");
mail("[e-mail]","-f [e-mail]");

电子邮件向Gmail发送正常邮件但Hotmail始终拒绝此错误：

host mx1.hotmail.com[65.55.33.119] said: 550 5.7.0 (COL0-MC5-F28)
Message Could not be delivered. Please ensure the message is RFC 5322
compliant. (in reply to end of DATA command).

邮件ID标头由服务器自动生成,但也无法手动提供.

为什么Hotmail不开心？

邮件服务器具有SPF记录,反向DNS,未列入黑名单并通过mxtoolBox.com上的所有检查.

From标头无效.它必须具有以下语法：

From: "name" <email-address>

在你的情况下：

From: "Testing Site" <[e-mail]>

您的回复标题也是如此：

Reply-To: "Testing Site" <[e-mail]>

如果它与From标题相同(如你的情况),你可以省略它.

PS：RFC 2822未声明应引用地址中的显示名称.换句话说：以下3个标题应该全部有效：

From: "Testing Site" <[e-mail]>
From: 'Testing Site' <[e-mail]>
From: Testing Site <[e-mail]>