I've learned from our customers that E-mails from our contact form never gets through when being send from an IE browser? We have two different form extensions on the web site - both perfoming poorly when using IE - is that a general warp problem? and what can be done about this ? I can hardly bare thinking about having to change the theme for the entire website

Hi there, I cant believe that is a Warp problem.
And to identify the problem, we need more details!
Which IE version and which error message you got from mail server. Check the error logs or mail logs too.

Did you checked the forms with basic Protostar Theme? If not, please check the form extension with Protostar!