电子邮件包含图像并进入垃圾邮件

Question

I am creating a mail application which sends Email contains 1 Image(size-500KB). The mail is always going in spam folder and it always ask to 'Display Image Below'. I am also inserting all the necessary Headers which is:

$headers = "MIME-Version: 1.0" . "
";
$headers .= "Content-type:text/html;charset=iso-8859-1" . "
";
$headers .= "Reply-To: [e-mail]" . "
" .
$headers .= "X-Mailer: PHP/" . phpversion();
mail($to,$subject,$message,$headers);

How do i prevent mail going in Spam and Image should display without clicking 'Display Image Below'? Thanx

Answer 1

Try to use return-path in your headers like,

$headers .= "Return-Path: [e-mail]
";

Read Spamassassian