Default e-mail client
From MEPIS Documentation Wiki
If you want Gmail to send e-mail by default when you click an a "mailto:" link you need to go to "Configuration Editor" with the KDE Configuration Editor open:
- Select "Components -> KDE Components -> Component Chooser".
- In the left list box, select "Mail Client".
- Check the radio button "Use a different email client".
- In the text box below that radio button, type:
browser https://mail.google.com/mail?view=cm&tf=0&to=%t&su=%s&cc=%c&bcc=%b&body=%B
Where "browser" can be "firefox", "google-chrome", "opera", according to your preference. Even better, it can be the default browser "x-www-browser", which might not be the default KDE browser though, so it's better to search with "update-alternatives --display x-www-browser" to check what is the default browser, you can change it with "update-alternatives --set x-www-browser link_to_browser".
You can try clicking on one of the mailto links in this page http://www.ianr.unl.edu/internet/mailto.html to test to see if the browser opens the right page. Note that bbc, cc, subject and body template should be added automatically when you click on a link