Welcome to our forum!
For better research, please provide more details about this case:
Is this email the only user blocked?
Can you receive it after you add it to the safe senders list?
Is this blocked email unable to be found in Outlook client?
Here are a few steps you can try to resolve the blocked content problem in Outlook:
- Update Outlook: Make sure Outlook 2016 is up to date with the latest updates and patches.
- Check Trust Center Settings: Go to File>>Options>>Trust Center>>Trust Center Settings>>Automatic Download. Don't download pictures automatically in HTML email and ensure that is unchecked.
- Repair Office Installation: Sometimes, repairing the Office installation can resolve such issues. Go to Control Panel>>Programs and Features>>Change>> select Microsoft Office, and click > Repair.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.