Print-out was garbled from specific user using outlook 2003

I am a tech support from a company in Philippines.I have one user experiencing problem to her print out in outlook 2003, She’s using Vista as OS. Everytime she prints an email coming from her supervisor the print-out always turns garbled but she can print normally from any email accounts except her supervisor. If I copy the email from her supervisor’s email in MS word the print out still turns garbled. Any idea that can help me regarding this problem? Please reply.. Thanks