encrypted tmda-ofmipd

Dear tmda experts,
please help me with stunnel + ofmipd configuration. I am trying to 
encrypt smtp communication between client and server.

When I setup configuration as descriebed in:
tmda/contrib/ofmipd-stunnel-xinetd, the client is not able to send mail 
via port 8026. It disconnects with popup error message (actual popup 
window in Slovenian language):
"Pri pošiljanju pošte je prišlo do napake: Strežnik je poslal nepravilen 
pozdrav: 20 buco.home ESMTP tmda-ofmipd + stunnel"
which means something like:
"Error sending mail: The Server sent wrong hello message: 20 buco.home 
ESMTP tmda-ofmipd + stunnel"

On the server side log from tmda-ofmipd-starttls-stunnel-wrapper:
2006.12.26 01:50:06 LOG5[5017:3086268096]: Negotiations for smtp (server 
side) started
2006.12.26 01:50:08 LOG3[5017:3086268096]: Unexpected socket close 
(fdgetline)
2006.12.26 01:50:08 LOG5[5017:3086268096]: Connection reset: 0 bytes 
sent to SSL, 0 bytes sent to socket

On the other hand, the client talks to tmda-ofmipd unencrypted just 
fine, by running command (as root):
/usr/local/tmda/bin/tmda-ofmipd -d -f -p 0.0.0.0:8025 -a /etc/tofmipd
... client connects to port 8025 and sends the mail. Also the whitelist 
is updated, so the mail goes via tmda-ofmipd for sure.

Also, client is able talk to postfix on port 25 via TLS.

In fact everything works fine, unless stunnel is involved.

system info (server):
- tmda 1.1.9 (tarbal)
- python 2.4.4 (rpm)
- stunnel 4.15 (rpm)
- postfix (rpm)
- fedora core 6
- configuration from tmda/contrib/ofmipd-stunnel-xinetd

client:
- Thunderbird 1.5.0.9
- outgoing server setting port 8026, TLS

Thanks for your answer.

Zoran