Quick start

Start with the free domain checker to review public DNS. Your mailboxes stay with your provider; setup time depends on DNS propagation and the receiving server.

1. Choose how to start and confirm your account

Eligible accounts can start a card-free Basic pilot once, with 1 domain and 1,000 messages per account per day. You have 7 days for setup. Confirm the test email using its receipt code to start the 14-day active period; the pilot ends no later than 21 days after your request. It does not create an automatically renewing subscription.

You can also choose a paid plan at Pricing. A card-based 14-day Stripe trial is limited to eligible first subscriptions and is unavailable after a consumed card-free pilot. Plans and trial terms explain the choices.

Open your account confirmation email and set your login password. If a signup or checkout was interrupted, request a secure continuation link from Signup.

2. Save a rollback plan and identify your origin server

Open Guided setup and choose cPanel or Plesk. Copy your current MX and any TXT records you plan to edit, including priorities and TTLs. Keep an independent copy so you can restore them.

Enter the actual server that hosts your mailboxes and its SMTP port, usually 25. Confirm the hostname with your hosting provider; the domain's current MX is not always the receiving server. Keep this server running.

Follow the manual cPanel setup or Plesk setup recipe. Both need checks in your own hosting account. For a hosting business, see hosting email security.

3. Verify ownership and check TLS before switching MX

Publish the exact ownership TXT shown for your domain at _spamless-verification.<domain>, then run the ownership check. Run the receiving server's TLS preflight and review the provider's local-mail delivery settings.

Once ready, publish the displayed MX values. Keep existing SPF and DKIM settings unless a documented provider step requires a change. If SPF needs editing, update its existing record rather than creating a second one. DNS propagation can take up to 48 hours.

4. Confirm the routing checks

Click Verify TXT and MX. A new domain starts filtering once its current ownership challenge and MX checks pass and the account has valid mail access. The receiving-server TLS check is a separate setup step.

5. Request and confirm a test email

Use a mailbox you control on the domain and press Send one test email. Find the message in your inbox or spam folder and enter its receipt code in Guided setup. This records your confirmation of that test's receipt; DNS checks and a filtering decision alone do not establish mailbox delivery.

Review Quarantine, Domain health and the Value report. The report separates filtering decisions from your test-receipt confirmation. Custom sensitivity and team seats depend on your plan.

6. Continue or restore the previous routing

The dashboard shows your pilot deadline. Choose a paid subscription to continue afterward, or restore your saved MX settings before leaving. After the pilot expires, your login and retained information stay available, but new mail requires valid paid access. Existing stored messages remain subject to their retention period.