HKEY_LOCAL_MACHINE\Software\Clients\Mail
HKEY_LOCAL_MACHINE\Software\Clients\Mail\FoxMail
HKEY_LOCAL_MACHINE\Software\Clients\Mail\FoxMail\Protocols\mailto\shell\open\command
"D:\TOOLS\FOXMAIL\FOXMAIL.EXE" %1
HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express
HKEY_LOCAL_MACHINE\Software\Clients\Mail\Outlook Express\Protocols\mailto\shell\open\command
"C:\PROGRAM FILES\OUTLOOK EXPRESS\MSIMN.EXE" /mailurl:%1