Wrong email headers?

Question

PHP

$header = 'MIME-Version: 1.0'.PHP_EOL;
$header .= 'From: =?UTF-8?B?0KPQutGA0YHQtdGA0LLQuNGB?=<[email protected]>'.PHP_EOL;
$header .= 'Reply-To: =?UTF-8?B?0KPQutGA0YHQtdGA0LLQuNGB?=<[email protected]>'.PHP_EOL;
$header .= 'Return-Path: [email protected]'.PHP_EOL;
$header .= 'X-Mailer: PHP/5.4.45'.PHP_EOL;
$header .= 'Content-Type: multipart/mixed; boundary="7d6fb4c7db5d29bd0be3fea7426822e8"'.PHP_EOL.PHP_EOL;

Warning: mb_send_mail(): Multiple or malformed newlines found in additional_header in /home/ukrser2/e-ukrservice.com/www/test.php on line 24
error

What is the problem?

Answer 1

There was a problem with the mbstring.func_overload value.

Answer 2

Multiple ... newlines found in additional_header

$header .= 'Content-Type: multipart/mixed; boundary="7d6fb4c7db5d29bd0be3fea7426822e8"'. PHP_EOL.PHP_EOL;