Webmail and privacy

I use webmail quite a lot, but there is other people as well who use the same computer as me. I am asking this; when I read a mail, does the mail getting saved in the Internet cache files? I mean, a lot of stuff goes to the cache when surfing.

Thanks.

 

Not sure...maybe the site is....but anyway just clear cache/temp internet files on exit....I do every time I go offline.