Test OTP codes without hunting through an inbox

Why OTP flows are fiddly to test

• Codes expire fast. Five or ten minutes is common, so switching between a mailbox, a search box and your app eats into the window.
• Resends pile up. After two or three resends, it’s hard to tell which code is the newest and which ones should already be dead.
• Emails hide the code. It might be in the subject, in a big styled block, or in a sentence next to an order number and a support PIN.
• Several testers, one inbox. Using a teammate’s code by mistake looks exactly like a bug in your app.

How Proxy Mail QA helps

1. Create an address for the test, or one per tester.
2. Trigger the code in your app: sign-in, two-step verification, email change, checkout confirmation.
3. The code appears on the address’s row with a Copy button, usually within seconds.
4. If the email states how long the code lasts, a countdown shows the time left. Otherwise you see when it arrived.

Each row always shows the newest email that contains a code or link, so a “Welcome” email arriving straight after “Your code is 482913” doesn’t hide the code.

What to check in an OTP email

• The code is easy to copy: no spaces or line breaks in the middle of it.
• The stated lifetime matches what the app enforces. A code that says “10 minutes” shouldn’t stop working after 2.
• Requesting a new code invalidates the old one, if that is your policy.
• Wrong codes are rate-limited, and the error message says how many tries are left.
• The email says what the code is for, so a user who didn’t request it knows to ignore it.
• The code isn’t in the subject line if your security policy says it shouldn’t be visible on a lock screen.