Hi @rtoohey,
If you are using our post office you please see the screen shots below.
1. Sign in to TPG Post Office
- Once you're signed in click on settings.
2. Click Mail Filter Settings and scroll down you should see all the filtering options below.
3. You can add the Email Address you want to block and allow to your inbox.
Note: You can also distribute the Email on your chosen Email Folders.
Hope this help.
Let me know should you require further assistance. 