On Mon, 5 May 2008 05:02:50 -0700 (PDT), Maxleaf.Ye@gmail.com wrote:

>I have installed slackware 12.1,but kmail doesn't work, throwing up
>the above message.Anyone any ideas ,what's causing this?

If I remember well, I had this error too, some time ago.

The solution was to install a library, maybe 'cyrus-sasl'? But I'm not
sure wether that's the right one.

'cyrus-sasl' says:

"cyrus-sasl (Simple Authentication and Security Layer)

This is the Cyrus SASL library. Cyrus SASL is used by mail programs on
the client or server side to provide authentication and authorization
services. See RFC 2222 for more information.C".

What error messages do you get when you start kmail from the Konsole?