Headers encoding problem in Zend\Mail\Message

[thestanislav]

My mail client do not recognize mail format when I set mail Message charset to UTF-8.
Here what I got in mail headers

To: =?UTF-8?Q?=D0=A1=D1=82=D0=blahblah
Subject: =?UTF-8?Q?=D0=95=D1=81=D1=blahblah
From: =?UTF-8?Q?=D0=A0=D0=B0=D0=B4=blahblah
MIME-Version: 1.0
Content-Type: =?UTF-8?Q?text/html?=
Content-Transfer-Encoding: =?UTF-8?Q?8bit?=
Content-Disposition: =?UTF-8?Q?inline?=

According to RFC http://www.ietf.org/rfc/rfc2047.txt only specific mail headers can be encoded when charset is set to other than ASCII.

http://www.ietf.org/rfc/rfc2047.txt
....
These are the ONLY locations where an 'encoded-word' may appear. In particular:

• An 'encoded-word' MUST NOT appear in any portion of an 'addr-spec'.
• An 'encoded-word' MUST NOT appear within a 'quoted-string'.
• An 'encoded-word' MUST NOT be used in a Received header field.
• An 'encoded-word' MUST NOT be used in parameter of a MIME
  Content-Type or Content-Disposition field, or in any structured
  field body except within a 'comment' or 'phrase'.
  ....

Temporary solution can be

foreach(array('Subject', 'From', 'To') as $_h){
    $mail->getHeaders()->get($_h)->setEncoding('UTF-8');
}

$transport->send($mail);

[thestanislav]

Another problem is that attached binary files with non ascii names have broken encodings.

[bhelm]

i can confirm this problem, please fix!
The temporary solution posted above works, but you have to avoid using the $mail->setEnconfig() function.

[GeeH]

This issue has been closed as part of the bug migration program as outlined here - http://framework.zend.com/blog/2016-04-11-issue-closures.html