I'm doing a major cleanup of old Gmail email messages. I want to quickly find the senders that have the most number of messages. In Thunderbird, I set the view to All Mail, and then display in Card View. I'm sorting by From, and Grouped By Sort. This gives me a useful view, but I can not find a way to sort by number of messages (in other words to display the senders in order based on the total number of emails from that sender and show me the number of messages.) Is there a way to do this in Thunderbird? If not, are there any other tools/email clients that will give me a view like this? Thank you.