编码邮件功能php的麻烦

I am trying so send email with html body, I form it with entries from DB and everything okay, when i check composed message using

echo $message;

I see great composed text without any errors, but after sending it using mail() function, I have trouble with only 1 symbol.

All page and all data in utf-8, header set to utf as well:

$headers .= "Content-type: text/html; charset=utf-8
";

echo result:

gmail result:

How can I solve this problem?

I found the solution Added to headers and remove any charset

$headers .= "Content-type: text/html
";
$headers .= "Content-Transfer-Encoding: base64" . "
";

And do that with all my message:

$message = rtrim(chunk_split(base64_encode($message)));

Now everything works!