Rich Text vs. HTML

Don't really understand your question.  You don't have much space to store files and believe that converting Rich Text files to HTML files will increase the file size?  And/Or, hyperlinks don't currently function in Rich Text files?

as such there is no option you hve to select HTML format while u send the mails .

Or eitheruse third party application like Enterprise Vault

Right now within our enterprise, approximately 4000 users, most people still have MS Office / Outlook 2003 installed, and some have MS Office / Outlook 2007.  When someone emails a hyperlink from 2007 to someone with 2003, the hyperlink does not open unless both users have the HTML format chosen in Outlook rather that Rich Text.  We have been told by consultants that HTML will use up a lot of space on the Exchange server and they do not recommend changing everyone to HTML.  We are looking for alternatives if any exist.  Thank you for your time and help!

Does anyone know of any existing alternatives besides changing format to HTML?

Changing the format to plain text.  Display hyperlinks as a URL.  The other end will have to copy and paste into the browser of their choice.

We do not want the user to have to copy and paste the link into the browser.  So it sounds as if the options are only what has already been mentioned?  Does anyone have any other suggestions?  Thank you for your time and help!

You're welcome.  I've requested attention on your question.  I believe a moderator may be able to alter your zones to hit a better expert audience.

Thank you, I appreciate your help!

Thank you to everyone for all your responses.  

It sounds as if we need to consider security as more of an issue rather than space.  I will take this information back to the supervisors and they will need to decide what will be done.  

Thanks again to everyone for all your help!

seems no one else has any other suggestions