stripping css styles in html mails

stripping css styles in html mails

We sometimes send an email to a contact which is based on a html template. I have added the styles in the template and additionally link to an external style sheet.

When I login as a user and send the email to a contact there is no problem and the email sends perfectly, including attached styles.

However my other user logs in and wants to send the email to a contact it arrives at the destination without formatting and defaults into Times Roman etc... If she logs in as another user on her pc the same thing happens.

I checked the source code in the delivered mails and it looks like one mail includes the styles and the other (the one my collegue sent out) doesnt include the styles in the header.

FYI I am using Window XP and I think she is using Windows 2007.