When sending emails is it possible to have sender as someone else instead of my name for example I work for company XYZ and send various marketing emails. Is it possible to have sender as XYZ Ltd instead of my name?
You cannot change it to the company name but you can change it to another user.
While you create a new activity "Email", click on the lookup against the "From" field and change it to the other User. It can be another user but not an account.