I used the add on "full address column." Today's update silently removed the add on and does not provide any obvious replacement for showing the senders email address in the main email window. Why are you helping spammers to get their way ? This is extremely frustrating and I might have to look for an alternative email client. Seeing the senders email usually makes detecting spam emails a lot easier. The "Correspondents" column is in most cases misleading.

Best Regards.