Odd -- Willie Soon is the lead author on an Earth-Science Reviews paper titled "Re-evaluating the role of solar variability on Northern Hemisphere temperature trends since the 19th century," and they list him as "corresponding author." But unlike all their other papers, they don't actually give his email address.
Instead, the usual links to the corresponding author just go around in a loop.
Strange. Why wouldn't Willie Soon want to correspond with people who are reading his paper, if he was didn't have something to hide?