Thank you for your reply!
I tryed setting the following in my ISP-provider's DNS panel:
Subdomain Type TTL Data
ns1 A 3600 123.456.789.12
ns2 A 3600 123.456.789.12
The DNS settings in ISPConfig 3 (123.456.789.12) are the same as behore:
A domain.com. 123.456.789.12 0 3600
A mail 123.456.789.12 0 3600
A www 123.456.789.12 0 3600
MX domain.com. mail.domain.com. 10 3600
NS domain.com. ns1.domain.com. 0 3600
NS domain.com. ns2.domain.com. 0 3600
Now I can ping ns1.domain.com
and receive a response back.
But I have lost the response from www.domain.com
instead. The mail.domain.com
isn't reponding either, just like before.
To me it seems like the ISPConfig DNS settings doesn't have any effect, even though everything is there.