Account sandbox

To protect everyone’s reputation, every new team starts in a sandbox:

	Sandbox	After the sandbox
Period	The first 7 days after your team is created	Afterwards
Daily limit	100 emails per day (each recipient counts)	Your trust level and plan
Sender domains	Verified domains, or the test sender	Same
Applies to	All plans, including paid	n/a

The day is a UTC calendar day. When you reach the limit, the API returns:

{
  "statusCode": 429,
  "name": "daily_quota_exceeded",
  "message": "New accounts can send 100 emails per day during their first 7 days. Contact support to lift this early."
}

The same limit applies over SMTP (reply 452) and to broadcasts, where the broadcast ends failed once the limit is hit.

Making the most of it

• Use the test addresses to exercise your integration; they count toward the limit like any email.
• Use the first week to verify your domain, set up webhooks and send real traffic to your engaged users.
• Ramp volume gradually anyway. See Warming up.

Lifting the sandbox early

Upgrade to a paid plan, or email support@spacepost.dev with your use case. See Account verification and sending limits for the full picture including trust levels.

The Free plan monthly allowance (3,000 emails) is separate and still applies in the sandbox.