Export Your Blocked and Safe Senders List in Outlook

To export the blacked and safe senders list in Outlook:

In Outlook, click on the Home tab, then the Junk dropdown, and finally Junk Email Options.
Click on the tab Safe Senders and if you have any entries listed there, click on the Export to File button.
A save file popup will appear. Navigate to a location in your OneDrive to save the file to and give the file the name Safe Senders.
Repeat the same process for the tabs Safe Recipients and Blocked Senders if you have any entries in there as well.