the email is going out as HTML then ?
i think you need to convert the vbCrLf to a "<br>"
Code:
strMessage=Request.form("Message")
strMessage=replace(strMessage,vbCrLf,"<br>")
every time you hit enter, that is a combination of a Carriage Return and a Line Feed (CrLf) your using vbScripting, so that combo is built into the scripting language (vbCrLf) converting the enter key into HTML Line Breaks (<BR>) will give you the proper formatting.