Hi, First all apologies for the dumb question- i know not a lot about mail servers and DNS. I have just one computer to assign a dns to. I read all about how I should have a backup name server in case the primary server goes down. So, what do I write in my zones file if I only have one server ? And, is it okay fro me to host my mail server using an mx record at the same ip address. my zones file currently looks like this. I think that the second NS entry is redundant but i don't know:- @ IN SOA server1.mydomain.com. root.localhost. ( 2007010205 ; serial, todays date + todays serial # 28800 ; refresh, seconds 7200 ; retry, seconds 604800 ; expire, seconds 86400 ) ; minimum, seconds ; NS server1.mydomain.com. ; Inet Address of name server 1 NS ns0.mydomain.com. ; Inet Address of name server 2 ; MX 10 server1.mydomain.com.; MX 20 mail.anotherdomain.com.; ; mydomain.com. A 88.456.123.46 www A 88.456.123.46 server1 A 88.456.123.46 ns0 A 88.456.123.46 ftp CNAME www.