SmarterMail Bad Data. While logging on
Assume that, Your Enable32bitAppOnWin64 = 1
And you are getting the following message
Bad Data.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Security.Cryptography.CryptographicException: Bad Data.
Fix:
Force the Mailservice.exe to run at 32BIT mode with the following command
corflags.exe <executable> /32BIT+
Sourced from: http://www.smartertools.com/portal/KB/a111/how-to-smartermail-on-a-64-bit-server-with-aspnet-20.aspx