Skip to content

Tools · Published 2026-09-29

Bounce decoder

Paste a bounce diagnostic and read the class, whether the address is suppressed, and the fix. It runs in the browser. No account.

Paste a diagnostic line. Nothing is sent.

Paste the diagnostic line from a bounce. The same classifier the product uses names the class, whether the address is suppressed, and the fix. It runs in your browser. Nothing is sent, and no account is required.

A delay notice is not a bounce, and it does not suppress the address. An unreadable message does not suppress it either. Only a diagnostic that says the address itself is gone suppresses it.

The four classes and their fixes are the ones on the deliverability guide. Check a domain with the DNS check, or set a key ceiling with the budget calculator.