Funcţie: DMARC acts as a manager, overseeing the entire email authentication process

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DKIM (DomainKeys Identified Mail):

Funcţie: DKIM acts as a digital signature for your emails. It adds a cryptographic seal to the message header, which contains information about your domain name and a public key.
Role in authentication: Email servers that receive your exit mobile database message can use the DKIM signature to verify its authenticity. They use a public key record published in your domain name system (DNS) to decrypt the signature and confirm that it matches the private key used to sign the email. This ensures that the message originated from your domain and has not been altered in transit.
SPF (Policy Framework for Shippers):

Funcţie: SPF acts as a security agent, verifying the identity of anyone trying to send email from your domain.
Importance of Verification: Publish an SPF record in your DNS that specifies the authoritative mail servers authorized to send emails on your behalf. These could be your own mail servers or third-party services that you use for marketing emails.
Preventing spoofing: When an email arrives claiming to be from your domain, the receiving server checks the SPF record. If the email server sending the message is not listed as authoritative, it is marked as suspicious, preventing email spoofing attempts.
DMARC (Domain-based Message Authentication, Reporting, and Compliance):

Authentication Purpose: DMARC uses SPF and DKIM checks, but adds an additional layer of control. It allows you to define a policy in your DNS record that instructs email providers on how to handle emails that don't have SPF or DKIM authentication (for example, quarantine, reject, or deliver). DMARC also provides reports on email activity associated with your domain, helping you identify potential spoofing attempts.
Essentially, DKIM verifies the message itself, SPF verifies the sender's IP address, and DMARC relies on these checks to provide a framework for handling unauthenticated emails.