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 ip6:2a03:6f00::/32 include:spf.unisender.com include:_spf.mail.ru redirect=_spf.mail.ru ~all