License & domain binding

Your license is a signed token, generated on your subsimail.com account, that your self-hosted install activates against.

Set your domain, get a token

1. Go to your Account → License section
2. Enter the domain your SubsiMail install runs on (or will run on)
3. Set your connected-account count
4. Save — a signed token appears, ready to copy

Activating on your instance

On your self-hosted instance's license screen (first-run setup, or later at Settings → License), you have two ways to activate:

1. Connect your SubsiMail account (recommended, shown as the primary button) — redirects you to log in and approve on subsimail.com, then sends you straight back with the license activated. No copying or pasting anything.
2. Paste a token (the "or" option below it) — copy the token from this account page and paste it in manually. Useful if the instance can't reach subsimail.com directly during setup, or you just prefer it.

Either way lands on the same confirmation screen before anything activates, showing exactly what domain and account count you're about to accept.

Why the token is bound to a domain

The signed token carries your domain as one of its claims, and your self-hosted instance only ever trusts the domain inside that token — never a value you type into the instance itself. This is deliberate: it's what stops a leaked or shared token from being pointed at a domain its owner doesn't control. If you need to change domains, update it here (not on the instance) and re-activate with the freshly signed token.

Connected-account count

Your first 2 connected email accounts are free forever. Beyond that:

Flat per-inbox pricing — not per-seat. Team members are unlimited regardless of plan; see Pricing & billing.

The heartbeat check

Once activated, your instance periodically re-checks in with a lightweight heartbeat call — just the license key and a random install ID, nothing about your emails, contacts, or campaigns. If your instance can't reach subsimail.com for an extended period, sending pauses until it can reconnect; a brief outage on either side doesn't interrupt anything.