-bash-3.00# nslookup autodiscover.azerfon.az
Server:         10.10.1.3
Address:        10.10.1.3#53

Name:   autodiscover.azerfon.az
Address: 10.10.1.86

-bash-3.00#

# "Smart" relay host (may be null)
#DSmail.azerfon.az:sms.narmobile.az
DSautodiscover.azerfon.az

-bash-3.00# cat /etc/hosts
#
# Internet host table
#
::1     localhost       
127.0.0.1       localhost       
10.15.208.88    analizator      analizator.com  loghost
10.15.208.89    Analizator2     
#10.10.1.86     mail.azerfon.az mailhost        autodiscover.azerfon.az
10.10.1.86      autodiscover.azerfon.az         mailhost
10.75.58.83     sms.narmobile.az
-bash-3.00#

-bash-3.00# grep "^host" /etc/nsswitch.conf
hosts:      files dns
-bash-3.00# 
-bash-3.00# 
-bash-3.00# 
-bash-3.00# cat /etc/nsswitch.conf 
#
# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

#
# /etc/nsswitch.dns:
#
# An example file that could be copied over to /etc/nsswitch.conf; it uses
# DNS for hosts lookups, otherwise it does not use any other naming service.
#
# "hosts:" and "services:" in this file are used only if the
# /etc/netconfig file has a "-" for nametoaddr_libs of "inet" transports.

# DNS service expects that an instance of svc:/network/dns/client be
# enabled and online.

passwd:     files
group:      files

# You must also set up the /etc/resolv.conf file for DNS name
# server lookup.  See resolv.conf(4).
hosts:      files dns

# Note that IPv4 addresses are searched for in all of the ipnodes databases
# before searching the hosts databases.
ipnodes:   files dns

networks:   files
protocols:  files
rpc:        files
ethers:     files
netmasks:   files
bootparams: files
publickey:  files
# At present there isn't a 'files' backend for netgroup;  the system will 
#   figure it out pretty quickly, and won't use netgroups at all.
netgroup:   files
automount:  files
aliases:    files
services:   files
printers:       user files

auth_attr:  files
prof_attr:  files
project:    files

tnrhtp:     files
tnrhdb:     files
-bash-3.00#

D{MTAHost}[mail.azerfon.az]