Customer-facing surfaces

Custom send domain.

Send dunning emails from your own subdomain (e.g., mail.yourcompany.com) instead of our shared sender. Better deliverability, real brand alignment, ~5 minutes plus DNS propagation. Amazon SES handles DKIM signing with AWS-managed key rotation under the hood — you just publish the CNAME records we generate.

Add a domain

  1. Go to Settings → Send domain in the workspace dashboard.
  2. Enter the subdomain you want to send from. We recommend a dedicated subdomain (like mail. or billing.) rather than your apex — keeps the email-reputation track separate from your marketing site.
  3. Click Add domain. We register the domain as an SES sending identity with EasyDKIM and generate the three CNAME records you need to publish.

Add the DNS records

Once you add the domain, the settings page shows three CNAME records— SES's EasyDKIM tokens. Copy the exact names and values from that page into your DNS provider (don't hand-type from this doc — the tokens are unique to your domain). Each record looks like:

  • CNAME at <token>._domainkey.yourcompany.com → <token>.dkim.amazonses.com (TTL 1800). All three follow this pattern with different tokens.

These three CNAMEs are the entire record set — there is no MX record and no SPF/DKIM TXT recordto add. Bounces and complaints are handled automatically on our side via an SES configuration set + SNS, so there's nothing for you to publish for return-path or feedback.

Verify

Click Verify DNS. This reads the current SES identity status — AWS polls your DNS on its own cadence, so the button refreshes what AWS has seen rather than triggering a new check. Once SES confirms the domain is verified for sending, it flips to “verified” and dunning emails start sending from your subdomain. CNAME propagation is usually a few minutes but can take a few hours; if it's not green yet, give DNS time and click Verify again.

What you can customize

The sending domain is separate from how the emails look. Brand the emails on these settings pages:

  • From name, brand color, and logo — under Settings → Email branding (From name defaults to your workspace name).
  • Subject A/B variants per dunning kind, with a z-test winner detector — under Settings → Email A/B testing.
  • Body overrides per dunning kind — replace the default copy entirely while keeping our layout chrome — also under Settings → Email A/B testing.

Removing

From the same settings page, click Remove domain. We delete the SES sending identity and revert to the default sender. The CNAME records are yours to clean up at your provider.