Sample /etc/postfix/main.cf

queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
inet_interfaces = all
proxy_interfaces = 93.42.31.71
proxy_interfaces = 92.68.11.11
unknown_local_recipient_reject_code = 550
debug_peer_level = 2
debugger_command =
	 PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
	 ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail
newaliases_path = /usr/bin/newaliases
mailq_path = /usr/bin/mailq
setgid_group = maildrop
html_directory = /usr/share/doc/packages/postfix-doc/html
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/packages/postfix-doc/samples
readme_directory = /usr/share/doc/packages/postfix-doc/README_FILES
inet_protocols = ipv4
biff = yes
content_filter = 
delay_warning_time = 1h
disable_dns_lookups = no
disable_mime_output_conversion = no
inet_interfaces = all
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains = 
masquerade_exceptions = root
myhostname = thisserver.com
mydomain = thisserver.com
mydestination = $myhostname, localhost.$mydomain
relayhost = [smtp.gmail.com]:587
smtp_tls_security_level = verify
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
smtp_tls_session_cache_database = btree:/var/run/smtp_tls_session_cache
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
mynetworks_style = subnet
alias_maps = hash:/etc/aliases
canonical_maps = hash:/etc/postfix/canonical
relocated_maps = hash:/etc/postfix/relocated
sender_canonical_maps = hash:/etc/postfix/sender_canonical
transport_maps = hash:/etc/postfix/transport
mail_spool_directory = /var/mail
message_strip_characters = \0
defer_transports = 
mailbox_command = 
mailbox_transport = 
mailbox_size_limit = 0
message_size_limit = 0
strict_8bitmime = no
strict_rfc821_envelopes = no
smtpd_helo_required = no
smtpd_client_restrictions = 
smtpd_helo_restrictions = 
smtpd_sender_restrictions = hash:/etc/postfix/access
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = 
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtpd_sasl_auth_enable = no
relay_clientcerts = 
smtp_use_tls = no
smtp_enforce_tls = no
smtp_tls_CAfile = 
smtp_tls_CApath = 
smtp_tls_cert_file = 
smtp_tls_key_file = 
smtp_tls_session_cache_database = 
smtpd_use_tls = no
smtpd_tls_CAfile = 
smtpd_tls_CApath = 
smtpd_tls_cert_file = 
smtpd_tls_key_file = 
smtpd_tls_ask_ccert = no
smtpd_tls_received_header = no
virtual_alias_domains = hash:/etc/postfix/virtual
virtual_alias_maps = hash:/etc/postfix/virtual
disable_vrfy_command = yes
smtpd_delay_reject = yes
smtpd_banner = $myhostname ESMTP