gov.uk · Email
No DKIM key under the usual names
snag.page looked under the names most providers use; without DKIM, receivers can't check your email was signed by you.
- Turn on DKIM signing at your email provider.
- Publish the TXT record it gives you.
What it checks
DKIM keys under the selectors most providers use: google, selector1, selector2, k1 and others.
Why it matters
DKIM lets receivers check email from the domain was signed by its sender, which DMARC relies on.