Безопасность и доставляемость почты · grade A
v=spf1 a mx ip4:208.43.166.0/28 ip4:208.97.132.0/24 ip4:208.43.167.208/29 include:helpscoutemail.com include:sendgrid.net include:_spf.google.com include:mail.zendesk.com -all