What a sending domain does
A sending domain lets you send from you@yourdomain.com instead of a shared address. It also authenticates your mail with SPF and DKIM, which is what mailbox providers check to decide whether you land in the inbox.
Add and verify a domain
- Open Sending Domains and choose Add Domain.
- Enter your domain (for example
yourbrand.com). - The platform requests the domain from your active provider and returns a set of DNS records.
- Add those records at your DNS host (usually a few CNAME or TXT entries).
- Come back and let the platform re-check. Once the provider confirms, the domain is verified and ready.
Verification can take from a few minutes to a few hours depending on DNS propagation.
Provider support
Managed sending domains require a provider with a domain-verification API — Postmark, Amazon SES, Brevo, Resend, SendGrid, Mailgun, and EmailIt all qualify.
Using SMTP? SMTP has no domain-provisioning API, so managed sending domains are not available. Instead, configure SPF, DKIM, and DMARC directly with your SMTP host, then send from that authenticated domain. The Deliverability guide covers those records.
DNS records explained
- SPF tells receivers which servers may send for your domain.
- DKIM cryptographically signs your mail so it cannot be forged in transit.
- DMARC (recommended) tells receivers what to do when SPF or DKIM fail, and gives you reporting.
Troubleshooting
- Stuck as pending? Double-check the record host and value exactly match — trailing dots and subdomains matter.
- Verified then failed? A DNS change may have removed a record. Re-add it and re-check.
- Wrong provider active? Domains are provisioned on the active provider. Switch the active provider before adding a domain if needed.
Next steps
- Improve inbox placement: Deliverability.
- Start sending: Build a funnel.
