Custom webmail domain
Your mailbox, at your own address.
Your team signs in at mailbox.yourcompany.com and sees your brand, while we run everything behind it. It takes one or two DNS records.
In short
What is a custom webmail domain?
It is the web address people type to open their email. With one, that address is on your domain instead of ours.
How it works
One record to point it
The Branded app tab suggests mailbox.yourcompany.com and shows one CNAME record to add. Any other domain works too, with a TXT record that proves it is yours. We issue the certificate and keep it renewed.
Your brand at the door
Upload your logo and it replaces ours on the sign-in page, in the app and in the emails your people get. The browser tab and the installed app then carry your name and mark.
The mail stays where it is
Addresses, domains and their DNS records do not change. Only the address people open changes.
Manage it from code
Set, check and remove the address from the API, the SDK, the CLI or the MCP server.
import { nextmail } from '@nextmail/sdk' const appHost = await nextmail.appHost.set({ host: 'mailbox.acme.com' }) console.log(appHost.status, appHost.record)What you get
In the product today
Every paid plan
One address per workspace, on a subdomain you pick.
HTTPS from the start
No certificate to buy, upload or renew.
No hop to ours
People stay on your host from sign-in to sign-out.
Members only
Only people in your workspace, or invited to it, sign in.
Good practice
Getting the most out of it
- 01
Pick a short host
mail. or inbox. on the domain your team already knows.
- 02
Set your branding first
Upload your mark and logo so the door looks right on day one.
- 03
Put it where people look
Add the new address to your onboarding notes and your intranet.
Questions
Asked often
Keep going
Works well with
Start
Your domain,
your mail.
Point a domain at Nextmail and read it in a mailbox built around it. The free plan covers one domain.
Google Workspace
Fastmail