I won't ask why you're posting a question about email in a newsgroup
about Internet Explorer 6.
I suggest you find a newsgroup that handles questions about your mystery
e-mail program. When you post your question in that group, be sure to
tell them the version of this unnamed e-mail program, which version of
Windows you are using,the text of any error messages you may be seeing,
the name of your ISP, a concise description of exactly what happens when
you try to send e-mail, and any other items you think might be useful
information to someone trying to figure out what's causing your problem.