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When a Hotmail user blocks an email address, Microsoft’s filtering system automatically routes all future messages from that address to the Junk Email folder or deletes them outright. Common reasons for blocking include spam, previous unwanted emails, or accidental misclicks. Unblocking is a reversible, user-controlled action that does not require technical support.
Sometimes an email isn't technically "blocked," but Outlook filters it as junk because it doesn't recognize the sender. To ensure future emails go straight to your Inbox, add them to your Safe Senders list.