Dear support,
Here I am back.
We still cannot receive mail.I asked the provider en they did not see any trouble on the hosting settings.
The wordpress is able to send email using a contactform-plugin.
Do you have any advise for solving this problem?
Kind regards,
Ozzie
Thank you!,
It has not been solved yet, but I am working on it. (when I use my own testing-domain I receive mails, but my client’s not.)
I will contact the hosting provider.