I use Windows Live Mail. I am having this problem only with a couple of emails from Microsoft Customer Support related to a particular consultation, no problems at all with the other emails I receive.
Once the email is opened it appears blank.
If you click on it to reply, the message that Microsoft Customer Support sent to me appears included in the reply.
Also, if you look for the source code of the email I received, the message is there.
This prompted me to think that maybe some setting of Windows Live Mail maye not let me see that particular type of message when I open it, but I do not know where the solution is.
You can see an image if you follow the next link:
https://skydrive.live.com/?cid=515e8ca8874f8571#cid=515E8CA8874F8571&id=515E8CA8874F8571%21117&v=3
This happened some time ago. I made the question in english then in a section for a different language. The question was not answered there. Now I am making the question again here.
You can see, following the link below, the same question I posted in the past (so you can know when I posted this question before).
Greetings and thank you for your attention.