What is SingleSign Mail?
SingleSign Mail is a free mailbox for your SingleSign account. Claim an address like you@singlesign.com and you get a private inbox designed around one idea: your inbox belongs to you, not to anyone who happens to know your address.
SingleSign Mail is entirely optional. If you never claim an address, nothing about your account changes.
There are two kinds of mailbox, and you can have both: a personal one at @singlesign.com that is yours for good, and a company one — such as you@acme.singlesign.com, or you@acme.com on the organization's own domain — that an organization gives you. Every mailbox gets the same protection.
The basics
- It's part of your SingleSign account. There's no separate account to create. Once you claim an address, it's added to your existing SingleSign account — and it works as a sign-in alias, so you can even sign in with it.
- One sign-in, several mailboxes. Belong to an organization and you also get a company mailbox beside your personal one — its own inbox, Screener, and storage. Switch between them in the account menu, or read them together under All inboxes. See Your Accounts & Organizations.
- You use it on the web — and on your phone. The web app lives at email.singlesign.com. On your phone, you can install it as a home-screen app or connect your phone's built-in mail app over IMAP — see SingleSign Mail on Your Phone.
- Your existing sign-in email keeps working. Claiming a SingleSign Mail address doesn't replace the email you already use. You can keep signing in exactly as you do today, or optionally make your new address your primary email.
What makes it different
The Screener
The Screener is the heart of SingleSign Mail. Mail from anyone who has never written to you before waits in the Screener — a separate approval area — instead of landing in your inbox. You decide, once per sender, whether they get in. Nobody you haven't approved ever reaches your inbox.
Read more in The Screener.
First-contact quarantine
Because every first-time sender starts in the Screener, there's no such thing as a stranger appearing in your inbox. Cold email, list blasts, and "just bumping this to the top of your inbox" simply never get there.
Layered protections
Beyond the Screener, every message gets active protection:
- Link Guard checks every link before it opens and shows you where it really goes.
- Tracking pixels are flagged so you know when a message is watching you.
- Remote images ask before loading, so senders can't quietly learn when you read their mail.
- Sender authenticity is verified on every incoming message (SPF, DKIM, and DMARC).
See Privacy & Protections for the full picture.
A calm, capable inbox
Day to day, you get the tools you'd expect — done the SingleSign way:
- Tags with automatic rules and unread counts, for organizing mail your way.
- Sent-mail insight — see opens, link clicks, and delivery problems on the mail you send.
- Away auto-replies, custom backgrounds, and an All mail view across your whole mailbox.
See Sending & Receiving for details.
Writer and Spreadsheets
Your mailbox comes with more than mail. Alongside Calendar, Documents and Meetings, Writer is a document editor and Spreadsheets is a spreadsheet app — both open from the app launcher, save to Documents, and let you share with others as a viewer, commenter or editor and work together at the same time — with drawings, signatures, data from the web and AI help when your organization turns it on. See Writer: documents, Spreadsheets and Sharing, comments and version history.
Chat
With a company mailbox you also get Chat, your organization's team chat: channels, direct messages, threads, mentions and reactions, the way Slack works. Your most recent conversations sit in the Mail sidebar under Tags, and admins can bring their Slack history across. See Chat: getting started.
Built for companies too
An organization brings SingleSign Mail to your company. It gets a free address the moment it's created — acme.singlesign.com — and every teammate can have a company mailbox — name@acme.singlesign.com — that the organization owns and its admins manage, Screener and all. Add your own domain whenever you like for addresses such as name@acme.com. Colleagues appear in people search automatically, and everyone keeps their personal @singlesign.com mailbox as their own. There's no limit on the number of domains. See SingleSign Business — and Plans and pricing for what it costs.
Ready to try it?
Claim your address — good names go fast.
Last updated: 2026-09-28
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