Hi @Amanda_Jamison- I’m a Success Manager here at Asana and am happy to help on this. When you remove someone from a project, it only takes them off updates to that specific project while they still might belong to the Team or the Organization. This might be why the person is still receiving emails.
If you want to remove someone from the entire Asana space, you will need to remove them from the organization. You can see how to do that here: Setting up an organization in Asana | Product guide • Asana Product Guide
If you want to keep them in the organization, but no longer want them in a specific team, you can see how to remove them from one specific team here: https://asana.com/guide/help/organizations/members#gl-remove-from-team
Does that help?