Hi. Set up your opera without committing into it your "real" email address, just install it as a plain browser. Your email account can better be handled by mozilla-thunderbird (check ubuntu repositories and install it).
Don't bother to call up your ISP's for anything linux or about free software, their company is in the monthly payroll in Redmond (M$) just solely to kick off every *free-software's* a** from out their way
Come back if you have any problem.
Hope that helps. Good luck.