Mail-crypt won't encrypt emails

Hi,

We're running Dovecot 2.2.36 and we need to set up the mail-crypt plugin to encrypt all incoming and outgoing emails. Outgoing emails seem to get encrypted fine but the incoming ones don't. We tried everything including this config:

mail_attribute_dict = file:%h/Maildir/dovecot-attributes mail_plugins = $mail_plugins mail_crypt

plugin { mail_crypt_global_private_key =

}

also this one:

plugin {

mail_crypt_curve = prime256v1

mail_crypt_save_version = 2

}

but to no avail. There are no visible errors, Dovecot restarts fine and outgoing emails get encrypted. Any ideas?