go
mail.hardsextube.com has one IP number. hardsextube.com use this as a mailserver. hardsextube.com is a domain controlled by two nameservers at netvertise.us. They are on different IP networks. Incoming mail for hardsextube.com is handled by one mailserver at hardsextube.com themselves. hardsextube.com has one IP number. mail.hardsextube.com is hosted on a server in Hungary.

mail.hardsextube.com
a records
 
+ 84.2.34.19 84.0.0.0/14 AS5483  
+ ---  

hardsextube.com
a records
 
+ 84.2.34.1 84.0.0.0/14 AS5483  
+ ---  
ns-soa records
ns1.netvertise.us
+ 84.2.34.15 84.0.0.0/14 AS5483 mail.hardsextube.com
+ --- mail.hardsextube.com
ns records
ns1.netvertise.us
+ 84.2.34.15 84.0.0.0/14 AS5483 mail.hardsextube.com
+ --- mail.hardsextube.com
ns2.netvertise.us
+ 85.25.66.190 85.25.0.0/16 AS8972 vs2066190.vserver.de
+ --- vs2066190.vserver.de
mx records
mail.hardsextube.com
+ 84.2.34.19 84.0.0.0/14 AS5483  
+ ---  
ip numbers of host
84.2.34.19
ip numbers using ptr to this host
195.228.157.101
84.2.34.15
domains using this as mailserver
hardsextube.com