Безопасность и доставляемость почты · grade A
v=spf1 ip4:142.154.218.176/28 ip4:163.182.128.80/28 ip4:216.213.6.240 ip4:52.91.101.64 ip4:104.211.33.66 include:spf.protection.outlook.com include:mailgun.org include:mail.zendesk.com include:spf.mandrillapp.com include:spf.mtasv.net include:amazonses.com include:servers.mcsv.net include:_spf.salesforce.com include:spf.emailsignatures365.com -all