This message does not contain a DKIM Signature

Hi there,

For some reason my emails are being sent without DKIM headers.

I set up DKIM via Email Settings > DomainKeys... and then I created a TXT record with the info in my Cloudflare DNS settings page.

I have both email and DNS enabled for the virtual server in Virtualmin, like it says in the docs.

SPF and DMARC are both good.

Any ideas?