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In classic Outlook, on the Home tab, selectÂ
 Block and choose  Junk E-mail Options. -
On the Safe Senders tab, check the boxes on Also trust email from my Contacts and Automatically add people I email to the Safe Senders List.
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Select Apply > OK.
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In new Outlook, on the View tab, selectÂ
 View settings. -
Select Mail > Junk email.
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Under Safe senders and domains, select  Add safe sender.
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Enter the full email name or domain name, then press Enter or OK.Â