None at all.
Yahoo will be the reason, not JU...
I use both Yahoo and Hotmail and my Hotmail is spammed to the gills, and Yahoo nada! my kid says Hotmail always spams people, and that's sure my experience.
I did have my email addy, not in the sidebar however it could be found if someone clicked on "my journal" which is no longer there. THAT could be the culprit....
or else???