1) Read the messages with the web interface.
http://groups.google.com/group/urdu/
2) When viewing Urdu Gmail, in FireFox context menu (right-click),
select "SWITCH PAGE DIRECTION." This will fix the problem and the mixed
Urdu/English message will make sense. If you are in a textbox in Gmail,
use the FireFox context menu, "SWITCH TEXT DIRECTION."
I will be interested in knowing if these tips work for you. Or if you
are using another browser or email client, what is the situation there?