[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Imp\Protocols\mailto\shell\open]
[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Imp\Protocols\mailto\shell\open\command]
-@="iexplore.exe -nohome webmail.example.com/horde/imp/?actionID=login_compose&to=%1"
+@="Rundll32.exe Url.dll,FileProtocolHandler webmail.example.com/horde/imp/?actionID=login_compose&to=%L"
[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Imp\shell]
[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Imp\shell\open]
[HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Imp\shell\open\command]
-@="iexplore.exe -nohome webmail.example.com/horde/imp"
+@="Rundll32.exe Url.dll,FileProtocolHandler webmail.example.com/horde/imp"