Originally posted by shadkong
Are there any virus for Linux?
I received a mail in KMail, but it says:" this is a html mail, it only display html source code for safety ..."
To answer your thread question, the answer is, YES.
As for HTML, lots of email applications are using that default caution these days because you can get hacked from something encoded in html, xml, jpeg, gif, flash, and just about anything. Microsoft went so far as to NOT accept ANY attachment by default using Outlook Express.
In the case of email I set my email accounts to display only people I have in my personal address book. If the mailer doesn't have this option I don't use it. But of course another option would be to run a mail program that didn't have anything set for file helpers and run it to change all incoming messages to plain text only. You can get hacked that way too if I'm not mistaken so I've stopped doing that too.
For email you can try Thunderbird or the emailer that comes with Netscape 7.2 or ... and for the virus problem, there are Linux virus removal and detection programs out there also.