KNode is your usenet mail reader.

Features

This straight forward, full-featured news reader is provided by KNode, the default news reader from KDE. It is equipped with all features you would expect:

GNKSA compliant
supports multiple news servers
signing emails and newsarticles
reading and composing of MIME multipart messages
inline display of attachments (text and images)
supports all international character sets
powerful search and filter functions
spell checking
supports full scoring
drag 'n' drop between groups and archive folders

and much more

A Tutorial is available, KNode for Mailing Lists