root@smtp:~# cat /etc/postfix/main.cf
# 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 (Debian/GNU)
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 = smtp.beetechnology.vpn
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = smtp.beetechnology.vpn, smtp, localhost.beetechnology.vpn, localhost

# uncomment to enable final relay
#relayhost = [xterra.websitewelcome.com]
#smtp_sasl_auth_enable=yes
#smtp_sasl_password_maps=hash:/etc/postfix/sasl-passwords
#smtp_sasl_mechanism_filter = digest-md5
#smtp_sasl_mechanism_filter =
#smtp_sasl_security_options=

# temporary
#relayhost = [fedex.andrexen.com]
relayhost = 85.118.47.202
#relayhost = 192.185.164.248
#relayhost = mail.beetechnology.fr
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 172.16.171.0/24
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all