Hello,
I have the same issue. For me my, configuration is ok, the confirmation mail (the mail with the link to confirm the subscription, with the option "Demander une confirmation") and the test mail is ok.
But the welcome mail is fail, and all other campaign mail is fail.
You can use https://dkimvalidator.com to test.
After, configure a confirmation mail, in the settings, and subscribe the dkimvalidator mail.
Check the result,
For me :
In : "DKIM Information:
DKIM Signature
Validating Signature
result = pass"
You can make an other check, replace TEMPORARY your super user mail by the dkimvalidator mail and send a test mail (with the "Send a test" / "Envoyer un test" in configuration tab).
For me it's result = pass to.
But the problem, if the configuration is good, like me, seem to come from acymailing.
If I uncheck use parts / "Plusieurs parties", it will be ok.
But I don't have the alternative text part (just HTML), but it work with integrated picture.
With this configuration, the test is ok for me.
You have an other choice uncheck "embed pictures"/"Inclure les images", and you can check use parts / "Plusieurs parties", it is working for me to.
You can see : https://www.acyba.com/acymailing/156-acymailing-dkim.html#dkimnotvalid
And try : "You should change your encoding format in AcyMailing to quoted-printable instead of 8bit to prevent this kind of modification by your server."
In my case, it don't work I have :
"X-Mailer: PHPMailer 6.0.7 (https://github.com/PHPMailer/PHPMailer)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted"
And test mail, don't have any message, it is a empty mail
Is the problem link to "quoted" and not "quoted-printable" ?
I have try with Php fonction, SenMail, and external SMTP, on OVH and the problem is the same.
Is it the same for you ?
For Acymailing team, I would like to send an html and text mail, how is it possible ? Can you check on your way ?
Thanks in advance
Have a good day