Hi there, It appears that ispconfig will not allow you to add email servers with the same priority. Some of our clients make use of third party spam solutions and emails are sent to these servers and then forwarded to our server. For load-balancing these guys require that we have two mail servers with the same priority. Is there a way of doing this in ispconfig?
As far as I remember, ISPConfig does not check the MX priority for duplicates. Which error message do you get when you add another MX record? As temporary workaround, you can add the additional MX record at the end of the pri.... config file of the domain manually.