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Mammoth Mail

Receive email on your domain without port forwarding.

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Run Mammoth Mail at home or behind a firewall without opening inbound SMTP port 25.

How Tusk MX works

Tusk MX is an optional receiving relay for Mammoth Mail. You point your domain’s MX records at Tusk MX, and your Mammoth Mail server makes an outbound connection to receive mail. No inbound SMTP port forwarding is required on your network.

Tusk MX does not host your inbox. Your self-hosted Mammoth Mail instance stores the delivered messages.

Public senders deliver mail to Tusk MX, which passes it over a connection started by your self-hosted Mammoth Mail. No inbound port forwarding.

Set up your domain

Select Tusk MX in Mammoth Mail and publish the MX and TXT records it provides. The setup screen checks the records and shows when receiving is ready. You need control over the domain’s DNS and a running Mammoth Mail instance.

Supported receiving providers

  • Tusk MX: Free hosted receiving relay. No inbound ports or public Mammoth Mail endpoint required.
  • Direct MX: Receive SMTP directly on your own server using port 25.
  • Mailgun: Receive messages through Mailgun’s inbound routing.
  • Cloudflare Email Routing: Send incoming mail to Mammoth Mail through a Cloudflare Worker.
  • Resend: Receive through Resend’s inbound email integration.
  • Postmark: Receive through Postmark’s inbound webhook.