Most webpages explicitely specify the fonts to be used.
And some emails (especially the text variety) don't, but use the default font. And if that is different in your mail program from your word processor, it might look different.
Check the source of the mail to see what it says about fonts. In Outlook Express, it's in File>Properties>Details>Message Source. In your email program, it might be somewhere else.
Hope this helps.
If I make a selection from a web page with graphics and varying text fonts, then paste into a Word document, the page comes out the way it's supposed to be. But if I copy a message from my email which is apparently in Times New Roman font, and paste it into a Word document, it comes out in Arial, which is my default font. I don't understand.
Can anyone help me on this one?