gmail不支持html格式,通过php到gmail的html电子邮件与邮件中的文本不兼容

我有一个PHP脚本从我的网络发送电子邮件到Gmail。

PHP代码

$str = $_POST['to'];

$contacts=explode(",",$str);

foreach($contacts as $contact) {

$to = $contact;

$subject = $_POST['subject'];

$message = $_POST['message'];

$headers = "From: ".$_POST['from']. "

" .

"Reply-To: ".$_POST['reply']."

" .

"X-Mailer: PHP/" . phpversion();

if(mail($to, $subject, $message, $headers)){

echo "

window.alert('Email Sent Successfully')

window.location.href='dashboard.php';

";

}else{

echo "

window.alert('Email Not Sent')

window.location.href='dashboard.php';

";

}

}

}else{

}

}

HTML代码

Your Email
Receipant(s)
Email for Reply
Subject
Message
	Cancel Submit

邮件正在发送但gmail文本未正确显示。我参考下面的图片，并在此处看到消息标签显示在“”中，这就是为什么它们不起作用。怎么可能让它变得可行。 enter image description here