mail2.fmrgbcn.com and mail2.mccann.com.tr cnames to this hostname. tm.com, mrm.pl, ium.se, gjw.hu, lowe.se and at least 100 other hosts use this as a mailserver. interpublic.com is delegated to two nameservers, however two extra nameservers are listed in the zone. Two of them are on the same IP network. Incoming mail for interpublic.com is handled by nine mailservers at interpublic.com themselves. There are three duplicated IP numbers. Some of them are on the same IP network. interpublic.com has one IP number.