Mulberry and Windows 11

Hi.  According to the archives, there have been no postings to
this list since March 2021, so my first question is whether I'm
the only remaining Mulberry user.

If not, has anyone tried installing and using it on a Windows 11
machine?  I'm having other issues with the machine setup, so
Mulberry may not be to blame, but:

Incoming messages, via IMAP, work fine.  However, when messages
are supposedly sent, they are copied correctly into "sent"
folders, they appear to go out properly (no error messages) but,
as far as I can tell, the mail server (which is on the same LAN,
at least during this debugging attempt) never sees them.  The
server works fine sending mail from Mulberry on an adjacent
Windows 10 machine and when an SSH connection is made to it and
a mail dialogue typed in.  Same symptoms whether Mulberry
supposedly opens an SMTP connection directly to that machine or
when the connection comes in over an SSH tunnel.

Anyone have any ideas, or is this the end of the line, at least
for the Windoz version?  

thanks,
   john