An Email Attachment Question

I use Google email. My brother emails from Earthlink.

Most everthing he sends me comes frowarded as an attachment that is in the form of an MHTML document. My email cannot ever open the attachment to view it in this format. What do I need to do so I can see these attachments.

Thanks in advance.

This may help:

http://www.microsoft.com/downloads/details.aspx?FamilyId=95E24C87-8732-48D5-8689-AB826E7B8FDF&displaylang=en

It says MHTML is supported. Never tried it myself, so I don't know if it works for sure.