Claiming Your Address

Your personal SingleSign Mail address is something you claim once — for example, you@singlesign.com. Here's how claiming works and what it means for your account.

A company address like you@acme.singlesign.com or you@yourcompany.com works differently: it isn't claimed. An organization's admin gives it to you, and it comes as its own mailbox beside your personal one — see Joining an organization.

Choosing a name

When you claim an address, you pick the part before the @. A name must be:

• 3 to 30 characters long.
• Made up of letters, digits, dots (.), dashes (-), and underscores (_) only.
• Starting with a letter or digit (not a dot, dash, or underscore).

If a name is available, it's yours the moment you claim it.

Reserved names

Some names are reserved and can't be claimed — for example, names used by SingleSign itself, common role names like admin or support, and names reserved to protect against impersonation. If the name you want is reserved, you'll see a message during claiming and can pick another.

What claiming does

Once you claim an address:

1. It's added to your SingleSign account. The address belongs to your existing account — there's no separate mail account or password.
2. You can sign in with it. Your new address works as a sign-in email anywhere you use SingleSign, right away.
3. Your existing email keeps working. Claiming an address doesn't remove or replace the email you already sign in with. Both work.

Making it your primary email (optional)

If you'd like your SingleSign Mail address to be your primary email — the one shown on your account and shared with apps you consent to — you can switch it after claiming:

1. Go to Account → Email addresses.
2. Choose "Make primary" next to your SingleSign Mail address.
3. We'll send a one-time code (OTP) to confirm the change. Enter the code to finish.

You can change your primary email back at any time using the same flow.

Joining an organization?

If a teammate invited you to their organization, accept the invite first. Your company address is then given to you by the organization's admin — there's nothing to claim. A personal @singlesign.com address is separate and optional: claim one if you'd like a mailbox that stays yours wherever you work. You can have both. See Joining an organization.

Claiming is permanent

A personal address cannot be transferred once claimed — not to another SingleSign account, and not to another person. Choose a name you're happy to keep, because it's tied to your account from that moment on. (Company addresses are the other way round: they belong to the organization, which can reassign one after its holder leaves.)

Next steps

Once you've claimed your address, meet your new inbox's bouncer: The Screener.