SPF records
Information about the permissible posts of mail for the domainv=spf1 ip4:176.57.223.0/24 ip4:92.53.116.0/22 ip4:92.53.96.0/22 ip4:92.53.112.0/22 ip4:92.53.104.0/22 ip4:78.110.50.177 ip6:2a03:6f00::/32 ip4:78.110.48.0/20 include:_spf.hts.ru mx ~all