mail.ldd.ch has one IP number , which is the same as for ldd.ch, but the reverse is hostportal1.de. ldd.ch, stsk.de, khnw.de, hosc.de, sthhg.de and at least 74 other hosts point to the same IP. ldd.ch use this as a mailserver. ldd.ch is a domain controlled by two nameservers at tmag.de. They are on the same IP network. Incoming mail for ldd.ch is handled by one mailserver at ldd.ch themselves. mail.ldd.ch is hosted on a server in Germany even though the hostname implies Switzerland.