If you are certain you manually blocked the sender, the resolution requires navigating to Gmail’s "hidden" settings menu.
Gmail Settings → "Filters and Blocked Addresses" (or a new dedicated "Blocked" tab in Settings) unblock email gmail
If a sender is not on your blocked list, but their emails constantly land in , "unblocking" them requires a manual filter to override Google’s AI. This is effectively whitelisting. If you are certain you manually blocked the
To avoid having your emails blocked in the future, here are some helpful tips: but their emails constantly land in