SMTPBox plans, limits and email retention
Compare Free and Unlimited allowances, team access, API rate limits and test-message retention.
02 / YOUR WORKSPACE
Free and Unlimited
Every account starts on Free with no card required. Limits belong to the workspace and are shared by its projects, inboxes and members.
| Feature | Free | Unlimited |
|---|---|---|
| Captured messages | 2,500 / month | Unlimited* |
| Retention | 7 days | 30 days |
| Maximum message size | 10 MB | 25 MB |
| Team members | 5 | Unlimited |
| API requests | 600 / hour | 3,000 / hour |
| Projects and inboxes | Unlimited | Unlimited |
*Unlimited is for normal development and testing under fair use. It does not include bulk or production delivery. Workspace owners can upgrade and manage payment in the Billing section; changes are handled through secure Stripe pages. Cancelling returns the workspace to Free limits when the paid period ends.
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