gmx.net. 300 IN TXT "v=spf1 redirect=_spf.gmx.net"
_spf.gmx.net. 300 IN TXT "v=spf1 ip4:213.165.64.0/23 ip4:74.208.5.64/26 ip4:212.227.126.128/25 ip4:212.227.15.0/25 ip4:212.227.17.0/27 ip4:74.208.4.192/26 ip4:82.165.159.0/24 ip4:217.72.207.0/27 ip4:82.165.229.31 ip4:82.165.230.21 ~all"
1. whois