Guide

Self-hosted HIPAA email gateway: what to look for before you buy

If your practice or clinic sends patient information by email, you have probably been through the same loop: a hosted encryption service, a per-user bill, and a nagging question about where the messages and keys actually live. With Microsoft folding Office 365 Message Encryption into Purview Message Encryption, many small IT teams are taking another look.

This guide is for the people making that choice. It covers what a self-hosted email gateway is, when it makes sense, and what to check on any shortlist — including ours.

What "self-hosted gateway" actually means

A gateway sits in front of the mail you already run. You point your MX record at it for inbound mail and relay outbound mail through it as a smart host. Your mailboxes stay where they are. Nobody moves to a new email system.

The difference with a self-hosted gateway is ownership. The gateway runs on a host you control, and the keys stay on that host. The message path doesn't route through someone else's cloud on the way out.

Why teams look at this now

Three reasons come up again and again:

  1. Keys and data location. A new product name on a hosted service doesn't move the keys or the message path onto your hardware. If that matters to your risk review, hosting it yourself is the direct answer. (We lay out the details on the OME replacement page.)
  2. Recipients hate extra accounts. Patients and partners don't want to install a client or create a login just to read one message.
  3. Predictable cost. Per-user hosted pricing grows with headcount. A gateway you host is licensed differently.

What the recipient experience should look like

Ask every vendor to show you the recipient's side. With Secure Message, a recipient doesn't install anything, join a chat, or create an account. They open a link and enter a one-time code sent to the mailbox they already have. That one-time-code portal is part of the Professional plan.

If a product can't make that step simple, your front desk will hear about it.

HIPAA: be wary of anyone selling a certificate

There is no official HIPAA certification for an email product. What you can look for is a product built to support the safeguards you are responsible for: encryption at rest under your keys, audit logs, and a message path on infrastructure you own. That's how we describe Secure Message — built to HIPAA safeguards, not certified. Your compliance obligations stay yours, and any vendor who says otherwise is overselling.

Questions to ask on your shortlist

  • Where do the encryption keys live, and who can reach them?
  • Does mail route through the vendor's cloud?
  • What does a recipient have to do to read a message?
  • Is message content ever sent to an outside AI model? (In Secure Message, not unless you opt into a hosted provider. The inbound classifier is an Enterprise signal and stays off until you turn it on.)
  • What happens to pricing at 10, 50 and 100 users?

How Secure Message compares with hosted options

Hosted services like Paubox, Proofpoint and Virtru are mature and easy to switch on. They make sense when you would rather not run a server. Secure Message is for teams who want the gateway on their own host. If you are weighing a specific vendor, our side-by-side pages are straightforward: vs Paubox, vs Proofpoint, vs Virtru, vs Mimecast, vs Purview.

What it costs

Prices from the Rubix Hub (checked 2026-10-22):

PlanPriceFits
CommunityFreeOne administrator, 1 domain, licensed for up to 10 users, inbound filtering on your host
Professional$690/yearLicensed for up to 100 users, 10 domains, adds the one-time-code recipient portal
Enterprise$1,490/yearUnlimited users and domains; adds Autopilot, eDiscovery and DLP

Full details are on pricing.

Getting started

You don't need a migration project to try it. Install Community on a host you control, point a test domain at it, and see how it fits. Setup steps live in the install docs, with DNS and TLS and architecture covered there too. Before you change MX, our free email authentication checker shows where your SPF, DKIM and DMARC stand.

Need to sign forms before you send them? Rubix PDF Sign is a free desktop app that fills, signs and flattens PDFs on your own workstation, with no cloud account.

FAQ

Is Secure Message HIPAA certified?

No product can be HIPAA certified. Secure Message is built to HIPAA safeguards: encryption at rest under your keys, audit logs, and a message path on infrastructure you own.

Do recipients need an account?

No. They open a link and enter a one-time code sent to their existing mailbox. The recipient portal is on Professional.

Do I have to move our mailboxes?

No. The gateway sits in front of the mail you already run. You point MX at it and relay outbound through it.

Is there a free version?

Yes. Community is free for one administrator, 1 domain, licensed for up to 10 users.

Is Secure Message a replacement for Office 365 Message Encryption?

It's an option for teams who want the keys and message path on their own host. See the OME replacement page.

Get started free

Get a free Community license → Then follow the install guide. Want the recipient portal? See Professional.