Hello everyone,

I've just upgraded my Symfony projet from 5.0 to 5.2 because I needed to DKIM sign my emails (thanks to @fabpot).

I basically followed documentation by implementing my signature on my mail like that :

$email = (new TemplatedEmail())
         ->from(new Address('noreply@domain.com', 'Noreply'))
         ->to($userEmail)
         ->subject('Subject')
         ->text('My email text format')
         ->htmlTemplate('email.html.twig')
         ->context([
            ...
         ]);

$signer = new DkimSigner(
    'file://'.dirname(__DIR__).'/../'.$this->getParameter('private_key_filename'),
    $this->getParameter('domain_name'),
    $this->getParameter('selector')
);
$signedEmail = $signer->sign($email);

$mailer->send($signedEmail);

I also tried by getting content :

$signer = new DkimSigner(
    file_get_contents(dirname(__DIR__).'/../'.$this->getParameter('private_key_filename')),
    $this->getParameter('domain_name'),
    $this->getParameter('selector')
);

I still have "body has been altered" when using multiple DKIM lookup and the test fail.

I don't think there is a problem in charging the private key file because I first had those kind of errors that I fixed by adding the "/../" on the path.

I've set the public key on my DNS with TXT record and domain selector._domainkey.domain.com like that :

v=DKIM1;k=rsa;p=mypublickey

I don't think this is a problem of key integrity because I used openssl to generate the private and public keys :

openssl genrsa -out private.key 1024
openssl rsa -in private.key -pubout -out public.key

And I can't sign my email by using my SMTP server because I'm having a mutualized offer and I can't change server configurations.

Did I miss something ?

Thank you for your time and I hope someone had the same problem !