Безопасность и доставляемость почты · grade A
v=spf1 ip4:72.1.46.0/23 include:_spf.google.com include:spf.mandrillapp.com include:stspg-customer.com include:spf.smtp2go.com include:_spf.salesforce.com include:amazonses.com include:spf.protection.outlook.com ~all