https://groups.yahoo.com/neo/groups/emax/members/all
I searched on his user name: lindenlovede. In the results that came up, if you hover your mouse between his display name
and email address (which says not disclosed) you should see an icon pop up that looks like 2 word balloons.
Click that to send the user a private message. Additionally, I included my email address both normally
AND as My Name AT Some Domain Dot COM in case Yahoo filtered out the actual address.
We'll see what happens.