After adding a custom sender, open Event Settings > Email & SMS > Email Senders, select its Actions > Set up sender, then continue to 3. Authenticate domain. Your event plan must include custom email senders; the form shows an upgrade message if unavailable. HeySummit uses the custom From address only after email verification and all required domain checks pass.
Required domain records
Domain authentication requires three DKIM CNAME records, an SPF-aligned MAIL FROM return path with MX and TXT records, and one valid DMARC policy. These let receiving mail servers verify messages sent from your domain.
Set up the records
Copy the three DKIM CNAME names and values from sender setup into your DNS provider.
Add the MX and TXT records shown under SPF-aligned return path for the dedicated MAIL FROM subdomain.
Add one valid DMARC TXT record at _dmarc.your-domain. Ask the person who manages your domain about the policy because it affects every email service on that domain.
Select Check DNS records now. HeySummit automatically rechecks incomplete authentication. Verification can take time after DNS changes are published.
While authentication is pending
Pending authentication alone does not stop event emails. HeySummit uses the managed @events.heysummit.com address and shows a warning until the custom sender is ready. Once the saved domain checks pass, apply the custom sender to event emails.
If a check fails
If DNS temporarily cannot be checked, HeySummit preserves the last verified state and retries. If the records are correct but provider verification has failed, the setup retries automatically. Other sending restrictions still apply; authentication does not guarantee delivery.
For the complete sender workflow, see Creating a Custom Email Address.