mailbox encryption

Hello,

I've got dovecot 2.3 going, and I've got a file 10-mailcrypt.conf which is loading mail_crypt, thinking that that plugin would propagate through all the services, sieve, lmtp, and mailbox message storage. I'm not seeing anything in the logs indicating that the encryption is happening.

I am using a file format dbox specifically sdbox format, and in my mailbox I am seeing files like u.5 and others, a file check on them reveals them as data.

Should I be seeing encryption in the logs?

Thanks. Dave.