Originally Posted by lexcomputer
I server is at co-location place. There has DNS server for me already. Do I have to setup SPF record on my server?
In ISPConfig Management-> Server setting -> DNS, I just edit default Ns1 and Ns2 as the ISP DNS server instead my co-location server. I don't know whether it helps or not.
You must create the SPF record on the DNS server that is authoritative for your domain. You can run
to find out what servers are authoritative for your domain.