Email
List-Unsubscribe Checker
Check a sender's List-Unsubscribe header.
Runs in your browser. Free, nothing is uploaded.
About this tool
Free list-unsubscribe checker tool. Check a sender's List-Unsubscribe header. No signup, nothing uploaded.
Frequently asked questions
Do you send any email?
No. This tool only analyses or generates text and records.
Is my input stored?
No. Everything stays in your browser.
Will this fix my deliverability?
It shows the problem; fix it at your DNS or mail server as indicated.
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