Here's a solution for all who want to use winmail and windows 8. Many people have tried to do this. I found this solution in another forum. TechnoMage has tried this and tells me it works.
The procedure is almost the same as windows 7 , but we will need an additional dll file.
First , we do the same procedure as in windows 7 :
a) Take ownership of winmail forder ( if you use windows 8x64 , you need to take ownership of "Program Files/winmail" and "Program Files(x86)\winmail". Remember to check the " show system files " before that.*
* On a 64 bit Win-8, you will do nothing in the "Program Files(x86)\winmail" folder, only in the 64 bit folder.
b) Delete all the files in winmail forder and replace them with the windows 7 / winmail files.
c) Copy msidcrl30.dll to c:/windows/system32 folder
d) Now , we have to register the above dll. Open cmd and type : regsvr32 "c:/windows/system32\msidcrl30.dll" and press enter.
Reboot , just in case , and you're done