DKIM is an email authentication system that uses two cryptographic keys: a public key published in a Domain Name System TXT record and a private key encrypted in an outgoing message signature. The domain owner is the one who generates both keys. This way, it can be checked if the mail is authentic or forged.
Enabling DKIM authentication on Help Scout
Go to your DNS and make the following changes in your DNS records
Create two CNAMEs (example.com and strong1 and strong2 has been used as examples, replace your domain and desired selector names with it)
And point them (1) and (2) to the following
If the CNAME cannot be created, please contact Help Scout support for additional details
It takes 24-48 hours for changes to take effect.
Once DNS settings are completed, head over to the Help Scout mailbox and navigate to Settings > Outgoing Email and click on the Test Settings button.
If all the settings are properly configured in DNS, the DKIM status indicator will change to active.
Additionally, lookup and validate your DKIM record using a free DKIM record lookup tool to ensure that your DKIM CNAME records are devoid of errors and fully functional.
Enable DMARC for your domains by taking a free DMARC trial to stay abreast of domain spoofing and phishing attacks.