Linda in Wyo wrote:

I agree that the greatest security is to not read my personal email
at work. The only problem is that when I have my personal email
address installed in the same Outlook program as my work email, and I
am signed in on the office network, when I open Outlook to get my
office email, my personal automatically loads also.

You can certainly change that by adjusting the Send/Receive group settings.
Consider as well, using rules to move the incoming personal messages to a
separate PST.
--
Brian Tillman