Yes you can. You can go to the "All Mail" folder, add the "Size" column to the list view (right click the columns) and then proceed to sort every email by size.

Yes you can. You can go to the "All Mail" folder, add the "Size" column to the list view (right click the columns) and then proceed to sort every email by size. https://support.mozilla.org/en-US/kb/message-list-columns https://support.mozilla.org/en-US/kb/message-list-columns