Relais
Relais connects custom-domain email with Gmail for incoming and outgoing messages.
What Relais is
Relais connects custom-domain email with Gmail for incoming and outgoing messages. Inbound mail reaches Gmail through the Gmail API without forwarding or intermediary mailboxes, while outbound mail uses Gmail’s Send As feature with per-domain SMTP credentials. Setup involves adding a domain and updating DNS records; the homepage says this takes five minutes. The managed plan includes automatic DNS verification, delivery logs, and monitoring. A 14-day free trial provides all features without requiring a credit card. If you do not subscribe afterward, delivery pauses while your configuration remains preserved. Managed pricing is $5 a year, billed at $5/year per Gmail account, with unlimited domains, unlimited email addresses, and as many connected Gmail accounts as needed. Self-hosted costs nothing on your own infrastructure and has the same features as the managed platform. Relais says its source code is GPL-licensed and presents the service for users avoiding migration or additional Google accounts.
Good
- Direct Gmail API inbound delivery
- Gmail Send As outbound mail
- Unlimited domains and email addresses
- 14-day trial without credit card
- Free self-hosted option
Watch out
- Managed plan charges per Gmail account
- Self-hosted requires your infrastructure
- Delivery pauses after an unsubscribed trial
Who it suits
Relais suits people who want custom-domain email inside existing Gmail accounts. It also fits users willing to self-host or pay per connected Gmail account.
Verdict
Relais combines custom-domain mail with existing Gmail accounts, covering inbound delivery, replies, DNS verification, and logs. The choice is between a $5/year-per-account managed plan and self-hosting at no plan cost.
Plans and prices
From Relais's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Self-hosted | Free | Bring your own infrastructure; same features as managed platform · Run it on your own infrastructure at no cost |
| Managed | $5 a year | Unlimited domains · Unlimited email addresses · Each connected Gmail account costs $5/year · $5/year per Gmail account |
The facts
Each one read from Relais's own pages, with the date it was checked.
Money
- After trial
- If you do not subscribe after the trial, email delivery pauses while your configuration is preserved.checked 8 Oct 2026
- Trial
- The 14-day free trial includes full access to all features and requires no credit card to start.checked 8 Oct 2026
What it does
- Delivery reliability
- The maker says Vercel Workflow handles delivery for durability and automatic retries.checked 8 Oct 2026
- Inbound email
- Inbound email is delivered directly to Gmail via the Gmail API, without forwarding or intermediary mailboxes.checked 8 Oct 2026
- Included features
- The managed plan includes automatic DNS verification, delivery logs, and monitoring.checked 8 Oct 2026
- Intended use
- Relais is presented for people who want custom domain email in their existing Gmail without adding a Google account or migrating.checked 8 Oct 2026
- Limits
- The pricing page says domains and email addresses are unlimited, and customers can connect as many Gmail accounts as needed.checked 8 Oct 2026
- Open source
- Relais says its full source code is available under the GPL license.checked 8 Oct 2026
- Outbound email
- Outbound mail uses Gmail’s Send As feature with per-domain SMTP credentials.checked 8 Oct 2026
- Purpose
- Relais connects custom domain email to Gmail for sending and receiving.checked 8 Oct 2026
- Self-hosting
- The maker says the self-hosted version has the same features as the managed platform and requires your own infrastructure.checked 8 Oct 2026
- Setup
- The homepage says setup takes 5 minutes and requires adding a domain and updating DNS records.checked 8 Oct 2026
- Technology
- Relais describes its application as a TypeScript Next.js app deployed on Vercel, with a self-hosted Stalwart mail server for SMTP.checked 8 Oct 2026
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