My email client is Mozilla Thunderbird. I have been using it pretty much from its launch about 8 years ago (launched on Dec 7, 2004). I have used various mail clients – Unix based Mail, mush and the first UI based client Eudora (as early as 1993).
Which browser do you use? It depends on whom you ask. Most home users in India who are non-techies would be using Internet Explorer.
Over 50% of the browser traffic for most portals in India is from Internet Explorer, which is fine. The sad news is approx 40% of IE users are still with version 6.0. Nobody pays attention to the disadvantages of using IE 6 until God warns you.
While we hear a lot of noise about Microsoft Internet Explorer being evil, it still rules the browser market. Its share might be reducing but it still holds a comfortable majority.