Безопасность и доставляемость почты · grade A
v=spf1 include:_spf.google.com include:spf1.hackerrank.com include:spf2.hackerrank.com include:_spf.salesforce.com include:amazonses.com ip4:202.234.163.1/24 include:_spf1.mailgun.org include:_spf.eu.mailgun.org include:_spf2.mailgun.org ~all