In the Zoho Mail Admin Console, go to Email Authentication → DKIM, add a selector (e.g. zoho), and Zoho generates a TXT record to publish at {selector}._domainkey.yourdomain.com. Publish it and click Verify.
Zoho creates a public key tied to your chosen selector. Add it as a TXT record at {selector}._domainkey. If the key is long, use your DNS provider’s chunked TXT format.
Click Verify in Zoho. Until verified and enabled, Zoho won’t sign with your key and DMARC won’t align on DKIM.
Substitute your selector:
$ dig TXT zoho._domainkey.yourdomain.com +shortCheck your DKIM record now
Open the free DKIM checker →You choose it when enabling DKIM; zoho is common. The record then lives at {selector}._domainkey.yourdomain.com.
