GetCurrentUser
To use the gnupg-secured mail gateway, you need to do the following:
Set up a gnupgp key directory with a pubring containing only the keys you care about and specify the following in your SiteConfig.pm
Set($RT::GPGKeyDir, "/path/to/keyring-directory"); @RT::MailPlugins = qw(Auth::MailFrom Auth::GnuPG Filter::TakeAction);