In some cases, we are using the Wix email compatibilities, which are handled by Sendmail. We also sent up our own Sendgrid account and our connecting directing via Sendmail's API to allow us to customize our emails for other scenarios.
For the most part, everything is working fine, except for Microsoft Outlook, which are not being received by the recipients using Outlook. We researched the issue and found we should modify our CNAME records to resolve the issue: https://sendgrid.com/docs/ui/account-and-settings/how-to-set-up-domain-authentication/
However, our Wix CNAME records already have records associated to sendmail, I'm guessing for domain authentication.
For example: s1._domainkey.somedomain.com
To use the Sendmail API, we are being told to have a different entry for s1._domainkey.somedomain.com.
How do we resolve?