I am trying to setup the DNS MX records needed so that all of our incoming mail is received through a spam filtering service. They have given me the MX records that I have to enter into ISPConfig.
The first two are priority 10, the second two priority 20, etc.
The problem is that ISPConfig will only allow me to enter one of the MX records. When I try to enter another MX record it gives me an error saying that "This or a similar MX Record does already exist in this zone."
What do I need to do to enter these 6 MX records?