Enabling DKIM verification

The DKIM validation method uses the message header digital signature to associate a domain name with the email. The DKIM signature verification function retrieves signer information, including the public key, from the DNS. This signer information is analyzed and verified to determine message legitimacy.

Enable DKIM verification on the page Settings > Inbound/Outbound > DKIM Settings, in the section DomainKeys Identified Mail (DKIM) Verification. Mark any or all of the following check boxes to activate DKIM verification:

• Enable DomainKeys Identified Mail (DKIM) verification for inbound messages
• Enable DomainKeys Identified Mail (DKIM) verification for outbound messages
• Enable DomainKeys Identified Mail (DKIM) verification for internal messages

By default, these check boxes are not marked.

Configure a custom content policy filter to scan for a DKIM signature in the message header, along with a filter action to take when a message header triggers the filter. See Custom content.