imap.yahoo.fr has one IP number , via cname to rc.europe.fyeu.b.yahoo.com , but the reverse is rc.vip.ch1.yahoo.com. yahoo.no, yahoo.it, yahoo.nl, yahoo.gr, yahoo.ch and at least 83 other hosts point to the same IP. yahoo.fr is a domain controlled by five nameservers at yahoo.com. All of them are on different IP networks. Incoming mail for yahoo.fr is handled by six mailservers having a total of eight IP numbers. Some of them are on the same IP network. yahoo.fr has two IP numbers. They are on different IP networks. imap.yahoo.fr is hosted on a server in Switzerland even though the hostname implies France.