SPF records
Information about the permissible posts of mail for the domainv=spf1 mx ip4:109.248.133.137 ip4:185.211.244.163 ip4:82.202.231.16 include:mxsspf.sendpulse.com include:_spf.yandex.net ip4:46.8.141.57 include:_spf.lite-host.in ip4:109.248.133.9 ~all