I did it, finally. the promised notes:
http://www.cocoavillagepublishing.com/development/tools/openbsd/tips/cyrus-imapd/
It was not obvious to me how to setup LDAP with Cyrus-IMAP and Sendmail
all in harmony for virtual hosting while still having things like
/etc/mail/virtusertable work with the virtual
domains being mapped to the lmtp socket by /etc/mail/mailertable.
some of the postfix examples using courier imap examples for cyrus did not
seem graceful either.
I ended up reading the fine documenation for each application and
discovering that a lot of articles posted from magazines were not that
accurate either.
I am sure what I put together can be improved upon, but per request here
are notes on a way to setup virtual emails with cyrus-imap, sendmail on
openbsd using ldap for authentication. I do hope someone else can
benefit from my week of googling and reading app READMEs and struggle.
Please Email me direct w/o copying the misc list with suggestions and
corrections to spare the misc list unnecessary traffic or trolling.