[Dokazan1]

вот

Microsoft Windows [Версия 5.2.3790]
(С) Корпорация Майкрософт, 1985-2003.

C:\Documents and Settings\MCDomainadmin>nslookup -type=mx mail.domen.com
Server: mcdc-b.mc.local
Address: 172.16.1.1

uzairways.com
primary name server = mcdc-b.mc.local
responsible mail addr = hostmaster.mc.local
serial = 47
refresh = 900 (15 mins)
retry = 600 (10 mins)
expire = 86400 (1 day)
default TTL = 3600 (1 hour)