S/Mime signed emails are blank

With smime configured correctly (incoming smime signed emails have verified good signatures, outgoing signed emails are blank. The outgoing email record looks like this:

Content-Type: multipart/mixed; boundary="----------=_1506007716-21211-10"
MIME-Version: 1.0
Precedence: bulk
X-RT-Original-Encoding: utf-8
Content-Length: 0

X-RT-Original-Encoding: iso-8859-1
Content-Length: 0

Content-Transfer-Encoding: base64
Content-Disposition: inline
Content-Type: application/x-rt-original-message
Content-Length: 894


The original message according to RT looks like this

X-Mailer: MIME-tools 5.509 (Entity 5.509)
MIME-Version: 1.0
Content-Transfer-Encoding: binary
X-RT-Interface: Web
Content-Type: text/plain; charset="utf-8"
X-RT-Original-Encoding: utf-8
X-RT-Encrypt: 0
X-RT-Sign: 1
Content-Length: 217

And then there is content here.

Just checking if anyone else had this problem yet.

It worked OK for me when I last checked. What version of RT do you have? Do you have rights for your webserver to read the files in defined keyring directory? What is in syslog or rt.log if you use it?