RelayMailPricing

Forward email to Slack / Namecheap Email Forwarding

Forward a Namecheap email forwarder (support@) to Slack

Namecheap's email forwarding has no mailbox behind it, so nothing can sign in to it. Add a forwarder from support@ to your RelayMail address, and each email starts a Slack thread. Replies from the thread go back to the customer as email.

Steps

  1. 1

    Turn on Email Forwarding

    The domain needs Namecheap BasicDNS, PremiumDNS or FreeDNS. In Domain List, click Manage next to the domain, open Advanced DNS, set Mail Settings to Email Forwarding and save. Namecheap sets the MX records and adds the SPF record forwarding needs.

  2. 2

    Add the forwarder

    On the Domain tab, find Redirect Email and click Add Forwarder. Enter support as the Alias and the forwarding address from your RelayMail setup page (inbox-...@relay.relaymail.app) as Forward to, then click the checkmark.

  3. 3

    Wait, then test

    Namecheap says a new forwarder takes about an hour. Then email support@ from an address other than the Forward to address.

  4. 4

    Send a test email

    Email support@ from another account. When it arrives, RelayMail confirms forwarding by itself. New emails appear in the channel as threads; reply there and the sender gets your reply by email.

Confirming the forward

Namecheap describes no confirmation email for a forwarder: fill in Alias and Forward to and save. If one does arrive, RelayMail passes it on to the email on your Slack account until forwarding is confirmed. Replies you write in the Slack thread go out from noreply@relay.relaymail.app with Reply-To set to your support address, so the customer's answer comes back through the same forward into the same thread. To send replies as support@ itself, verify your domain in RelayMail (see the custom domain guide); that adds sending records for RelayMail and does not change where your inbound mail goes.

What to watch for

  • Email Forwarding takes over the domain's MX records, so it can't run alongside Namecheap Private Email or another mail service on the same domain.
  • Up to 100 forwarders per domain. A catch-all (Redirect Email > Add catch all) sends every other address to one destination.
  • Messages over 20 MiB, attachments included, bounce.
  • If the domain uses other nameservers, the Redirect Email options aren't available in Namecheap.

Questions

Can a Namecheap forwarder send replies as support@?

Namecheap forwarding only receives. RelayMail sends the replies you write in Slack; verify your domain in RelayMail to send them as support@.

Why didn't my Namecheap test email arrive?

New forwarders take about an hour, and Namecheap says tests sent from the same address that is set as Forward to will most likely fail.

Answer Namecheap Email Forwarding email from the Slack thread

14-day trial, $0 today, then from $15/month per inbox. Cancel in Billing before day 14 and you pay nothing.

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Updated 2026-11-07. How we check these pages. Sources: Namecheap: How to set up Free Email Forwarding, Namecheap: Attachment size limit on email forwarding, Namecheap: Sending from your forwarding address, Namecheap: Why can't I modify Email records.

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