There is something wrong the the header that is being contructed when email is being sent. I had to modify wpgift-loader.php file.
find the line:
$sendit = wp_mail($to, $subject, $message, $headers);
1. above this line, add:
// this will send email in html format instead of text
add_filter(‘wp_mail_content_type’,create_function(”, ‘return “text/html”;’));
2. change this like by remove $header variable so the line looks like
$sendit = wp_mail($to, $subject, $message);
I am not sure how the $header was intended to work, but all I figured out is the fact that by not specifying this custom header, it works.
