Is Your Unsubscribe Really One Click? Check Free
Tool demo · Unsubscribe Header Checker
A short walkthrough of the free WarmInboxes one-click unsubscribe checker: read a message's headers and confirm the List-Unsubscribe and List-Unsubscribe-Post headers bulk senders need.
Unsubscribe Header Checker
Check whether a message’s List-Unsubscribe headers meet the one-click requirement Google and Yahoo enforce.
Run the Unsubscribe Header Checker → Free, no account.