This small change could help our users quite a lot but i fear it isn't possible with standard salesforce functionality. When clicking to send an email through standard salesforce functionality you are offered the "Additional To" search. On selecting this it allows a list view of "All Co-workers in Company" that displays our users.
Is it possible to create another list view filtering out specific roles/profiles of our users
Ultimately we have hundreds and hundreds of users and want to make it easier for a user to select from the list. Our roadmap of development includes a custom VF/Apex class to redesign this functionality but it isn't planned soon so had hoped for a quick fix. I haven't been able to find anything related on Google or setup just yet.