Sender Policy Framework specifies which mail servers are authorized to send email for your domain.
Learn more about SPF →DomainKeys Identified Mail provides a digital signature that verifies emails weren't altered in transit.
Learn more about DKIM →Domain-based Message Authentication tells receivers how to handle messages that fail SPF or DKIM.
Learn more about DMARC →Send an email from your domain to:
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We'll verify your actual SPF, DKIM, and DMARC authentication in real-time.
Check DNS records without sending an email.
(Less accurate - doesn't verify actual email signing)