[otrs] OTRS and PGP

Hi ppl, I'm really interessed by the PGP feature of OTRS. I have succeeded in enable it for ingoing mail but I'm always looking where I can setup OTRS to send signed or encypted mails. I have searched in Config.pm, Default.pm, the System configuration link of the admin interface (everywhere). All I've found was a ArticleComposeSign.pm or a ArticleComposeCrypt.pm but don't know where and how it works. Also, a cool feature (in my opinion) would be to have OTRS searching automatically for public keys on keyservers. The adress could be a predefined variable in Config.pm. Thanks for that great app anyway, I find it far more useable than RT :] Bert.