mail.gortex.se has one IP number , which also has a corresponding reverse pointer. mx.gns.se, mail.jm.nu, mail.jbu.se, mail.nrf.se, mail.agh.se and at least 67 other hosts point to the same IP. alvikslokalvard.se use this as a mailserver. gortex.se is delegated to two nameservers, however two extra nameservers are listed in the zone. There are two duplicated IP numbers. Some of them are on the same IP network. Incoming mail for gortex.se is handled by one mailserver at gns.se. gortex.se has three IP numbers. All of them are on the same IP network. mail.gortex.se is hosted on a server in Sweden.