go
a.mx.fatalboot.com and mail.bethereonwindows.com point to 72.14.247.114.

a.mx.fatalboot.com
a records
 
+ 72.14.247.114 72.14.246.0/23 AS15169  
+ ---  

mail.bethereonwindows.com
a records
 
+ 72.14.247.114 72.14.246.0/23 AS15169  
+ ---  
ip numbers of host
72.14.247.114
hostnames sharing ip with a-records
a.mx.fatalboot.com
mail.bethereonwindows.com
domains using this as mailserver
bethereonwindows.com
fatalboot.com