Using classic Outlook for Windows in business environments
In classic Outlook for Windows, remove the address from the blocked list or mark it as safe.
- On the Home tab, in the Delete group, select Block > Junk E-mail Options.
- Open the Blocked Senders tab.
- Select the blocked email address or domain.
- Select Remove, then OK.
To prevent the address from being treated as junk again:
- On the Home tab, in the Delete group, select Block.
- Select Never Block Sender.
If the blocked address is the same mailbox hosted on Exchange or Exchange Online, messages can still end up in Junk even after adding it to Safe Senders. In that case, administrator assistance may be needed.