go
mail.cplmg.com has one IP number , but the reverse is cplmg.com. smtp1.cplmg.com, smtp1.cpksa.com and smtp1.arg.com.bh point to the same IP. cplmg.com is a domain controlled by two nameservers at pairnic.com. They are on different IP networks. Incoming mail for cplmg.com is handled by three mailservers at cplmg.com themselves. All of them are on different IP networks. mail.cplmg.com is hosted on a server in United Arab Emirates.

mail.cplmg.com
a records
 
+ 83.111.79.200 83.111.64.0/18 AS5384 cplmg.com
+ --- cplmg.com

cplmg.com
ns-soa records
ns1.pairnic.com
+ 209.68.2.190 209.68.0.0/18 AS7859 -
+ --- -
ns records
ns1.pairnic.com
+ 209.68.2.190 209.68.0.0/18 AS7859 -
+ --- -
ns2.pairnic.com
+ 66.39.3.60 66.39.0.0/17 AS7859 -
mx records
smtp.cplmg.com
+ 213.42.40.243 213.42.0.0/18 AS5384 cda243.emirates.net.ae
+ --- cda243.emirates.net.ae
smtp1.cplmg.com
+ 83.111.79.200 83.111.64.0/18 AS5384 cplmg.com
+ --- cplmg.com
smtp2.cplmg.com
+ 83.111.239.246 83.111.192.0/18 AS5384  
+ ---  
ip numbers of host
83.111.79.200
ptrs of ip numbers
cplmg.com
hostnames sharing ip with a-records
smtp1.arg.com.bh
smtp1.cpksa.com
smtp1.cplmg.com
domains using this as mailserver under another name
arg.com.bh
cpksa.com
cplmg.com