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In classic Outlook, select Home >
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Select the Blocked Senders tab.
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Select an address or domain name, and select Remove.
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Select Apply > OK.
To block a sender, see Block senders.
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In new Outlook, on the View tab, selectÂ
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Select Mail > Junk email.
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Under Blocked senders and domains, locate the sender you want to unblock, then selectÂ
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Close the window to save your changes.
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In Outlook for Mac, go to the Outlook menu and select Settings.
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In the Email section, select Junk.
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Under Blocked senders and domains, locate the sender you want to unblock, then select (-) Remove.
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Close the window to save your changes.
