“KShowmail has the potential to be a very powerful and useful
tool for POP3 e-mail management. You can use it locally to weed
SPAM from a remote POP3 (Post Office Protocol v. 3) server
account.“You also can use KShowmail to list locally the mail on the POP3
server. The list shows the message number, message size, subject,
sender, date, and so forth. KShowmail also can show the e-mail
headers, display entire messages, or remove mail from the POP3
server–all from your local computer…”