MailSandbox (mailsandbox.com) – Collaborative email testing with a fake SMTP sandbox

Summary: MailSandbox captures and inspects emails sent from websites or applications using a fake SMTP sandbox, preventing real users from receiving test emails. It provides SMTP credentials to integrate with app environments and instantly captures email traffic for review.

What it does

MailSandbox offers a fake SMTP server that intercepts emails from local, staging, or development environments. Users paste provided SMTP credentials into their app config to capture and inspect email content without sending to real inboxes.

Who it's for

It is designed for developers and teams needing to test, review, and share emails safely during development and staging phases.

Why it matters

It prevents test emails from reaching real users while enabling easy inspection, sharing, and spam analysis, improving email testing workflows.