Ayuda con postfix

[AnubisBowhunter]

Hola, gracias por responder y una disculpa por la tardanza.

Esta es el contenido de mi main.cf

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

# TLS parameters
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
smtpd_use_tls = yes
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${queue_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 = (no lo puse por ser de la institucion donde estoy, si es un FQDN)
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = dominio, localhost.dominio, localhost (no los puedo mostrar)
relayhost =0
mynetworks = 127.0.0.0/8
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
smtpd_sasl_local_domain =
#smtpd_sasl_auth_enable =
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject _unauth_destination
smtpd_tls_auth_only = no
smtp_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
home_mailbox = Maildir/


netstat -na | grep 25
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
tcp6 0 52 ::ffff:148.208.1%&.2&%:22 ::ffff:201.152.7.41:64186 ESTABLISHED
tcp6 0 0 ::ffff:148.208.1%&.2&%:22 ::ffff:201.152.7.41:63497 ESTABLISHED

Comprenderas que no puedo andar poniendo la ip de mi servidor, espero me puedas ayudar.