Version: 1.9.7 (using 3.5.8, Gentoo) Compiler: Target: i686-pc-linux-gnu OS: Linux (i686) release 2.6.23-gentoo-r6 Would be nice if KMail wouldn't play any sound for a mail classified as spam.
Move the spam to a spam folder (by using filters), and disable "act on new/unread messages for this folder" for that folder. See also bug 118213 if that does not work.