DNS configuration own server... where to point mx records?
Solution 1:
If you set up a name for this server, like
mail.example.com. IN A 1.1.1.1
then you set up a MX server like
example.com. IN MX 10 mail.example.com.
If you set up a name for this server, like
mail.example.com. IN A 1.1.1.1
then you set up a MX server like
example.com. IN MX 10 mail.example.com.