use Outlook (any variant) or Internet Explorer.
We've all had to do it, anyone vaguely computer literate always gets roped in to remove spyware, viruses, worms etc. from a friend or family member's PC. Martin provides details on what I also think are the two best alternatives; Firefox the web browser, and Thunderbird the email client. Both are far better than the Microsoft alternatives for as many technical reasons as you care to list, and being open source are also free as in cost and actively maintained, quite unlike the almost abandonware status of Outlook and Internet Explorer.
If nothing else can persuade you, what about the latest vulnerability du jour for Internet Exploder?