在邮件正文php脚本中发送图像

I want to show images in the body of the mail in php mail script

$formcontent=" Name: $name 
 Picture: (I want to show the pic here)";
$recipient = "myemail@domain.com";
$subject = "Contact us";
$mailheader = "From: $email 
";
mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");
?>

I tried the following codes but it doesn't work, it shows the words as it is

$formcontent="<img src='http://anydomain.com/pic.jpg'>";  
$formcontent="<html><body><img src='http://images2.alphacoders.com/444/444259.jpg'></body></html>";

tried the following codes .

$formcontent= "<img src=//anydomain.com/pic.jpg'>";

$formcontent= "<html><body><img src='//images2.alphacoders.com/444/444259.jpg'>

</body></html>";