ns2.e-m.fr has one IP record. e-m.fr, mdr.fr, iaart.com, lovely.fr, tekyo.com and at least 100 other hosts use this as a nameserver. webdetente.net use this as a mailserver. e-m.fr is a domain controlled by two nameservers at e-m.fr themselves. They are on different IP networks. Incoming mail for e-m.fr is handled by one mailserver also at e-m.fr. e-m.fr has one IP record.