Domains

Retransmit only sends email from domains that are registered on your account and verified. This protects deliverability and proves you own the domain you send from.

Adding a domain

Open the dashboard and go to Domains.
Add your domain (e.g. yourdomain.com).
Publish the DNS records shown (SPF / DKIM) at your DNS provider.
Wait for verification to complete.

Domain statuses

Status	Meaning
`pending`	DNS records not yet detected. Propagation can take up to a few hours.
`verified`	Ready to send.
`failed`	Verification failed — re-check the DNS records.
`temporary_failure`	Verification hit a transient issue and will be retried.

What happens if the domain isn’t ready

Requests to POST /v1/emails are rejected before anything is sent:

The from domain is not on your account → 403 with error code domain_not_found.
The domain exists but isn’t verified → 403 with error code domain_not_verified (the message includes the current status).


{
  "error": {
    "code": "domain_not_verified",
    "message": "The domain `yourdomain.com` is not verified yet (status: pending)."
  }
}

Tip

The from field accepts either a bare address (hello@yourdomain.com) or a display name form (Acme <hello@yourdomain.com>). The domain is extracted from the address part.