To ensure that emails are sent and authorized by the owner of the domain, the following steps must be performed on Cisco ESA:
Generate keys: Generate DomainKeys Identified Mail (DKIM) keys. DKIM is an email authentication method that allows the recipient to verify that an email was indeed sent by the domain it claims to be from.
Create DMARC profile: DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a policy framework that builds upon SPF and DKIM to provide additional email authentication and reporting capabilities. By creating a DMARC profile, the administrator can define the desired policy for handling emails that fail SPF or DKIM checks and specify how receiving mail servers should handle such emails.
These steps, generating keys and creating a DMARC profile, contribute to ensuring that emails are sent and authorized by the domain owner, providing improved email authentication and verification mechanisms.