$TTL 7200
@   IN SOA ns1.your-server.de. postmaster.your-server.de. (
    2019061800   ; serial
    86400        ; refresh
    10800        ; retry
    3600000      ; expire
    86400 )      ; minimum

@                        IN NS      ns3.second-ns.de.
@                        IN NS      ns.second-ns.com.
@                        IN NS      ns1.your-server.de.

@                        IN A       52.9.184.xxx
mail                     IN A       52.9.184.xxx
ns1.first-ns.de          IN A       213.239.242.238
www                      IN A       52.9.184.xxx
autoconfig               IN CNAME   mail.your-server.de.
ftp                      IN CNAME   www
imap                     IN CNAME   mail
pop                      IN CNAME   mail
relay                    IN CNAME   mail
smtp                     IN CNAME   mail
@                        IN MX 10   mail
_autodiscover._tcp       IN SRV     0 100 443 mail.your-server.de.
@                        IN TXT     "v=spf1 +a +mx ?all"