Thank you for your reply.
Am 07.06.23 um 23:03 schrieb Odhiambo Washington:
The addresses are defined in Django settings if I'm not mistaken.
The more important question would be, where :-) since I already checked if I can set it to something alse, I might need a hint where exactly I can find it. In the SERVE_FROM_DOMAIN/admin I did not stumble upon it. If you don't know it, no problem, let's just wait for somebody who does, thanks.
And callout isn't evil.
Well, I wasn't talking about evil but bad practise - especially if they bounce the mail only because of this. Why would almost all other mail providers accept those mails!? Good questions with probably a complex answer :-D so let's just stick to the problem and a possible solution. Thanks again.
Kind regards, Jens.