UNIX and Linux Applications

; <<>> DiG 9.8.1-P1 <<>> vpc2a.wi.zut.edu.pl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 48313
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;vpc2a.wi.zut.edu.pl.           IN      A

;; AUTHORITY SECTION:
wi.zut.edu.pl.          14400   IN      SOA     dns.wi.tuniv.szczecin.pl. admin.wi.zut.edu.pl. 2014111302 14400 3600 604800 14400

;; Query time: 2 msec
;; SERVER: 192.168.200.2#53(192.168.200.2)
;; WHEN: Thu Dec 18 16:46:44 2014
;; MSG SIZE  rcvd: 101

mydestination = vpc2a.wi.zut.edu.pl, , localhost, localhost.localdomain, localhost

IPADDRESS vpc2a.wi.zut.edu.pl

# See /usr/share/postfix/main.cf.dist for a commented, more complete version


# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = vpc2a
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = vpc2a.wi.zut.edu.pl, localhost, localhost.localdomain, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

127.0.0.1       localhost
127.0.1.1       UBUNTU12.04-LAB UBUNTU12
192.168.200.93  vpc2a.wi.zut.edu.pl




# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

user@vpc2a user