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Add your domain in the dashboard, then add the DNS records we generate (MX, SPF, DKIM, and a verification TXT). Verification usually completes within a few minutes once DNS propagates. You can create unlimited mailboxes (plus subdomains) under a verified paid domain at no extra cost.

API keys live under Settings → API Keys in the dashboard. Create a key, copy it once (we only show the full value at creation), and send it as a Bearer token in the Authorization header. Rotate or revoke keys at any time without downtime for your other keys.

Yes. Mailpipe is provider-agnostic — you can switch the underlying sending service (Resend, SES, Mailgun, Postmark, or SendGrid) from the dashboard without changing your code or routing rules.

Limits scale with your plan and are enforced per API key. When you exceed a limit the API returns HTTP 429 with a Retry-After header so you can back off cleanly. Reach out if you need a higher ceiling for a launch or migration.

Plans are billed monthly or annually (annual saves 20%). Usage above your plan’s included volume is billed as metered overage at the end of the cycle. You can review usage and manage your plan from the billing portal at any time.

Yes. All connections use TLS 1.3 and data is encrypted at rest, with Postgres row-level security isolating every organization. On Mailpipe Cloud your email is stored in our managed database; connect your own Supabase and it lives in a database you control. To report a vulnerability, email security@mailpipe.dev or use the form below with the Security topic.

Confirm the endpoint returns a 2xx within the timeout, verify the signature using your signing secret, and check the Deliveries log in the dashboard for the response code and body we received. Failed deliveries are retried with exponential backoff.

For most questions, search this help center first — the answer is often one click away. If you still need a human, use the contact form below or email support@mailpipe.dev. Include any error messages, domains, and request IDs so we can resolve it on the first reply.