Relay APIPublic purchase is coming soon while the sending IP warms.Read the developer docs
UK email hosting for domains you control

Email you can inspect,
from domain to delivery.

Relaytera is UK email hosting, isolated cPanel website hosting, and a separate outbound email API — with clear controls for the things that can make email fail.

View plans Read the docs

Keep your domain where it is. Add only the DNS records your chosen product requires.

Emails/msg_2f8a41c9e07b
Delivered

Your receipt from Acme

From noreply@acme.comTo dana@northwind.devSent 22 Aug 2026, 13:41 UTC
SPF pass DKIM pass DMARC pass
Delivery trace1.33s to delivery
  1. 13:41:07.002AcceptedPOST /v1/messages · 202
  2. 13:41:07.061Preflight passedSPF · DKIM · DMARC aligned
  3. 13:41:07.204Signedd=acme.com · s=relay1
  4. 13:41:07.418Relayedmx1.northwind.dev · TLS 1.3
  5. 13:41:08.332Delivered250 2.0.0 OK
  6. 13:41:08.350Webhook emittedemail.delivered · signed payload
  7. 13:41:08.402Trace storedrecipient outcome · workspace audit

One message, one trace. The example above is a product preview — not a dashboard replacement.

Customer-owned domainsKeep your domain, DNS, and delivery history under your control.
REST + SMTP submissionUse the API for new work and SMTP for existing mail libraries.
Clear product boundariesMailbox hosting, website hosting, and outbound application email stay separate.
Choose your lane

One domain. Clear products.

Buy Relay Mail or Relay Hosting from Pricing. The outbound Relay API is documented while public purchase stays closed.

Month-to-month plans
Mailbox-only hosting

Relay Mail

Branded webmail, IMAP, and authenticated SMTP on a domain you already own. No website hosting required.

View Relay Mail plans
Month-to-month plans
Website + mailboxes

Relay Hosting

An isolated cPanel account for website files, databases, and mailboxes on your customer-owned domain.

View Relay Hosting plans
Free plan available
Audience capture

Gather Sprout

Signup forms that keep the provenance and consent evidence behind every contact, from a separate Relaytera site.

Visit gathersprout.com
Coming soon
Outbound application email

Relay API

Transactional and marketing email over REST or SMTP, with sender controls and a trace for every message.

Read the API docs
Platform

The operational details stay visible.

Sending is only one part of email. Relaytera gives the surrounding systems a clear place to live and a clear reason to exist.

Delivery traces

Follow one message from the API call to the receiver response, with the status and evidence at every hop.

Domain authentication

Generate per-domain DKIM keys and check SPF, DKIM, and DMARC without overwriting your existing DNS policy.

Suppression management

Hard failures and complaints protect recipients automatically. Temporary deferrals stay queued for another attempt.

Mailbox and website hosting

Relay Mail and Relay Hosting are separate from the outbound API: branded inboxes or an isolated cPanel account on a domain you already own.

Templates and broadcasts

Build reusable content, manage consent-aware audiences, and schedule broadcasts with recipient-level outcomes.

Signed webhooks

Keep your systems in sync with signed lifecycle events, HTTPS enforcement, and secret rotation from the dashboard.

Developer experience

One call, and a useful answer back.

The response includes the email and trace identity. Use the trace later to understand whether a message was accepted, deferred, delivered, or blocked before the SMTP conversation opened.

  • Idempotency keys on message submission
  • Scoped API keys, including SMTP-only access
  • Stable versioned /v1 request contract
  • Signed webhooks for lifecycle events
Read the API reference 
curl -X POST https://relaytera.com/v1/messages \
  -H "Authorization: Bearer $RELAY_API_KEY" \
  -H "Idempotency-Key: receipt-4821" \
  -d '{
    "from": "Support <support@your-domain.com>",
    "to": ["customer@example.net"],
    "subject": "Your receipt is ready",
    "traffic_class": "transactional"
  }'
202 accepted{ "id": "email_…", "trace_id": "trace_…", "status": "queued" }
Deployment

Your infrastructure, your choice.

Relaytera is designed around customer-owned domains and explicit product boundaries. Use managed hosting for convenience or deploy the email platform on systems you operate.

Self-host the Relay platform

Run the API, worker, durable queue, SMTP submission, and dashboard from the deployment boundary you control.

  • Durable queue state and delivery traces
  • Operational logs for the route
  • Self-hostable deployment boundary
Read the API docs

Managed mailbox and website hosting

Relay Mail and Relay Hosting provision the customer-owned domain products through Stripe and the client workspace.

  • Branded webmail and IMAP
  • Isolated cPanel per domain
  • DNS instructions after provisioning
Compare hosting plans
Support

Questions deserve a route to a person.

Ask about Relay Mail, Relay Hosting, the Relay API, an existing workspace, or a security concern. We’ll reply to the address you provide. Billing and account mail is sent from noreply@relaytera.com; write to support@relaytera.com or use the form. See also support policy.

Product boundaries are documented Delivery paths are explainable

Start with the product that fits your domain.

Explore the plans, read the API contract, and keep the route visible.

View plans Read the docs