您可以为此指定第四个header参数：
原文链接：https://www.f2er.com/php/132735.html$xheaders = "";
$xheaders .= "From: <$from>\n";
$xheaders .= "X-Sender: <$from>\n";
$xheaders .= "X-Mailer: PHP\n"; // mailer
$xheaders .= "X-Priority: 1\n"; //1 Urgent Message,3 Normal
$xheaders .= "Content-Type:text/html; charset=\"iso-8859-1\"\n";
$xheaders .= "Bcc:email@example.com"\n";
$xheaders .= "Cc:email2@example.com\n";
//.......
mail($to,$subject,$msg,$xheaders);
在$to字段中,您可以指定您的电子邮件或任何您喜欢的.
