Безопасность и доставляемость почты · grade A
v=spf1 include:spf.recurly.com include:spf.mandrillapp.com include:mail.zendesk.com include:_spf.google.com include:us._netblocks.mimecast.com include:spf.protection.outlook.com ip4:192.54.252.0/24 ip4:168.215.168.0/24 -all