Normal folders let you manually organize your messages into appropriate piles.
Smart folders provide automatic sorting for your incoming mail, and saved queries.
"Order" lets you adjust the order in which "Scan" examines your smart folders.
"Find" finds all messages (excluding only ones in Trash) that match the smart folder's query, ignoring its folder name.
The timezone to use when displaying message dates, and your Pachylet login password
Servers where your email arrives, and the "From" address to use when sending email