Trying to set up DKIM CNAME records for Fastmail

I am using Fastmail for my email for garyrobinson.net. Fastmail gives a Selector value for CNAME records; Netlify DNS has no way to input it. What do I do?

The Selector for the first CNAME record Fastmail tells me to use is fm1._domainkey. But it looks like Netlify gives me no way to enter that information.

Similarly, Fastmail tells me to create a TXT record with Selectot value “_dmarc.{mydomain.com}” and value “v=DMARC1; p=none;”.

These values are given at: https://www.fastmail.help/hc/en-us/articles/1500000280261-Setting-up-your-domain-MX-only.

Fastmail is telling me my DKIM records aren’t set up. I assume that’s because I have no Selector values in the relevant CNAME records. What do I do??

This should be resolved.

Thank you. The thing that was causing me trouble is that I was using the instructions at Setting up your domain: MX only – Fastmail, which talk about “Selectors”, rather than the ones at Manual DNS configuration – Fastmail which correspond to what you did!

Thanks again…