When displaying senders name in the folders why do you not display the actual email address. If the email address is displayed with EVERY email it would be easier to be cautious opening the email that are suspect. This would be a significant opportunity to spot a Phishing or scam email. The way some names are displayed the fraudsters have very realistic Fake names encouraging opening spam emails and possibility of opening virus containing links. All the virus protection in the world won't stop people being taken in by apparently genuine senders.
Even if only the sender's domain was displayed, it would be helpful