IE (and Firefox, by the way) are programmed to use the email-program that's defined in Control Panel>Internet Options>Programs. So you're limited to the choices you find there. Tell what they are.
Then, after choosing one, you should configure it to send mails via your mail-provider. Their help-pages should tell you how to do that. It's possible if that mail-provider (be it aol or msn) has the option to send via something called pop3/smtp. Do they?
A possible solution if they don't: you can connect a (new) gmail-account to Outlook Express. See http://mail.google.com/support/bin/answer.py?answer=76150
If you configure that account (in Outlook Express) to have replies sent to your aol-account or your msn-account, you've reached a workable situation, I think. You can send (using OE), and you get any answers in your regular account.
Hope this helps.
I have firefox, Mail with AOL, MSN. When i want to send a webpage that i am on to somebody, outlook express comes up to send the page. It is not programed, or able to send my stuff. I would like my aol or msn mail account to come up to send stuff or learn how to program outlook express to work. (I fill it out and it is undeliverable, does not recognize host)
If anyone understands what I am trying to say, please help.