SPF records
Information about the permissible posts of mail for the domainv=spf1 ip4:31.77.134.136 ip4:110.66.112.18 ip4:32.47.110.19 ip4:170.220.57.243 ip4:169.196.7.34 ip4:171.49.46.242 ip6:2001:499f:a20d:7003::/64 include:spf.mtasv.net include:amazonses.com include:_spf.intercom.io include:_spf.protonmail.ch include:spf.unis