It may be more of a problem of my Mailserversettings. But Apple wants to have an unsubscription Link in bulk mails, which of course I don't have in my event registrations Mail.
I get the following:
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
host mx2.mail.icloud.com [184.108.40.206]
SMTP error from remote mail server after end of data:
550 5.7.1 [CS01] Message rejected due to local policy. Please visit
Thanks for your reply. I guessed. But I think acymail uses the same API but seems to be accepted. Maybe because of the unsubscribe possibility (I understand that unsubscribe makes no sense for a registration mail). But that's what apple is writing here
Was just wondering if other users have the same problem and how they handle it.