Actually, I did some looking into it, here's what I come up with:
Server Location:
Server:
www.denisolivier.comIP Address: 213.186.45.17 (its the OVH server)
Organization: OVH SAS
Country: France
City, State: Roubaix, B4
WHOIS domain owner:
Organization Name: RIPE Network Coordination Centre
Address: P.O. Box 10096
City, State: Amsterdam ,
Postal Code: 1001EB
Country: NL
I did find something, he does business with
www.dolist.net which is an e-mail, sms and direct marketing outfit (it says so on his contact page). They manage all his incoming e-mails... and possibly all outgoing.
OVH.net is an ISP in France.
Looking at the header doesn't always tell the story as spammers often spoof the IP... Give false addresses and such. I would first trust the plugin...
So, there you have it.
The Spamato plugin should stop him as his address will be put on an international blacklist automatically.