Verify e-mail delivered to SMG is encrypted using TLS.

Hello all,

I'm receiving encrypted e-mails as confirmed by the header:

Received: from mail-relay1.muc.blabla.com (mail-relay1.muc.blabla.com [11.22.33.44])
 (using TLS with cipher AES256-SHA (256/256 bits))
 (Client CN "mail-relay1.muc.blabla.com", Issuer "Thawte SSL CA" (verified OK))

When I check the SMG audit logs, it shows "No" under "Delivered with TLS".

I'm assuming this is telling me that delivery to my Exchange server is not encrypted (which is fine).  Is there a way I can tell the message was delivered to the SMG with encryption?

In other words, can I look at the headers of the e-mails delivered to the SMG from the management console?

Thanks in advance.