Cakephp email Encoding subject gives wrong characters - php

Question

I'm sending emails with cakephp and I have been testing it with the followign website:
http://spamcheck.postmarkapp.com/
I have had several problems, which one of them was the encoding of the subject.
Right now, that one is solved, following some solutions I've found in the internet. First line of the code is what i'm doing with the subject
Here's my code:
$newsubject='=?UTF-8?B?'.base64_encode($subject).'?=';
$email = new Email('aws');
$email->from(['xxxx#zzzz.zz' => 'test'])
->template('default','confirmation')
->viewVars([
'user_email' => $emailTo,
])
->emailFormat('both')
->to($emailTo)
->subject($newsubject)
->replyTo('support#uphill.pt')
->helpers(['Html', 'Text'])
//->attachments($attachment->path)
->send($message);
After I recieve the email, the subject shows: "=?UTF-8?B?SW5zY3Jpw6fDo28gbm8gZXZlbnRvOiBOYXRpb25hbCBDb25mZXJlbmNlIG9uIEh1bWFuIFBhcGlsbG9tYSBWaXJ1cw==?="
What am I missing?
EDIT:
I'm using Cakephp 3.3 and here's my aws email transporter config
'aws' => [
'transport' => 'aws',
'from' => 'xxxx#zzzzz.z',
'charset' => 'utf-8',
'headerCharset' => 'utf-8',
]
Here's my email:
http://pastie.org/private/hzcicqrlzx425ucanxyl5a
Thanks

Answer 1

About the result :
You encoded the email Subject text with base64.
So, you get the encoded text from your Subject plain text.
You should use email Subject as string/plain text. Mail services doesn't decode your custom encode type automatically.
Change your Subject string :
$newsubject='=?UTF-8?B?'.base64_encode($subject).'?=';
#TO
$newsubject=$subject;
Search by typing EmailTransport or Email from config/app.php and check your email configuration is correctly configured.
Her is the details about CakePHP 3.x Email