How do SPF, DKIM, and DMARC work together?

DMARC is an anti-spoofing Framework that relies on two other email authentication mechanisms, SPF and DKIM. DMARC compliance requires at least one of these mechanisms to pass.

Sender Policy Framework (SPF) is a mechanism that allows the owner of a domain to specify which mail servers are authorized to send email on their behalf. Once a mail server has received an email from a sender, the mail server checks the SPF record for the sender’s domain, using the return-path email address as the domain name. If the IP address of the server that attempted to send the email isn’t listed in the SPF record for that domain, it’s likely that message is spam.

DomainKeys Identified Mail (DKIM) adds another layer of security to an email by adding a digital signature that can be used to verify that an email message was not altered during transit. The signature is created by encrypting a combination of header and body elements with a private key, which is stored on the sender’s mail server. Recipient servers then attempt to decrypt this signature with a public key listed in your domain’s DNS records. If successful, they know your message hasn’t been tampered with and can be trusted.

Deployment of DMARC, SPF & DKIM requirements:

·      Access to your public DNS

·      Email gateway outbound DKIM signing option

·      Email gateway admin panel access.

Read More : https://www.linkedin.com/pulse/how-do-spf-dkim-dmarc-work-together-aariya-rathi/

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