Always show the full email address of a sender in the view pane. This is a major security risk that the email address of a sender is hidden and requires several clicks to view. Default should always be to show the full sender email address.
I've lost in this way many emails, because addresses were changed.
Ryan Perry commented
Show the recipients, too. This is helpful in knowing which email address to unsubscribe. IE in my case, our company updated email schemas and a number of our partners are now emailing us in duplicate but it is hard to see which email to unsubscribe. The only way I can see to determine this is to look at the actual header, which isn't very user friendly. A mousover tooltip would be sufficient if MSFT wishes to preserve an abbreviated appearance.
Chantel van der Walt commented
This is extremely important from a security point of view.
Add this as an additional column for those that need it.... as it was in older versions. It's a security risk of not being able to see the sending email address.
Jack Hawkins commented
Microsoft, always show the full e-mail address!
You can add an option to show only the names for people that do not care about security.
AMIRAN MIRTSKHULAVA commented
This is a very necessary functionality, it is a pity that Microsoft did not think about it