Sandbox for email and SMS testing
Test sandbox for your app's emails and SMS messages
Avoid the risk of your test environments sending communications to real users by mistake. Every message lands in a test sandbox. Nothing reaches a real customer.
7-day free trial. No card required.
One sandbox for every channel
SMS inbox (SMPP)
Connect any SMPP client and watch messages arrive in real time, with delivery receipts and multipart handling.
Email trap (SMTP)
Catch every email your app sends. Preview HTML on desktop and mobile widths, check headers, read the raw source and download attachments.
WhatsApp Coming soon
Test your WhatsApp flows without a business account or real phone numbers.
Team inboxes
Invite developers and testers to a shared account so everyone sees the same messages.
Live updates
New messages appear as they arrive. No refreshing while you click through a flow.
Safe by design
Nothing is ever delivered outside your sandbox, so staging and test data can't leak to real people.
Switch over in a minute
Create an account, copy the credentials from your inbox page, and change your mail settings.
SMTP_HOST=smtp.tosandbox.com
SMTP_PORT=2525
SMTP_USER=your-inbox-username
SMTP_PASSWORD=your-inbox-passwordSimple pricing
Try everything free for 7 days with no card. Choose a plan when you're ready to keep your history and your team.