Unfortunately, not all email programs respect this custom. Fortunately, Hotmail does — if you tell it to.
Make Hotmail Indent Original Text in Replies with '>'
Note that this is not currently available in Windows Live Hotmail.
To make Hotmail indent the original text with '>' in your replies:
- Follow the Options link in the Hotmail toolbar.
- Go to the Mail category.
- Select Message Replies.
- Make sure Begin each line with ">" is selected under Original Text Indicator.
- Click OK.

