#
### Postfix main.cf
#
### Verify these directory settings - they are critical to Postfix operation.
biff = no
recipient_delimiter = .
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
program_directory = /usr/libexec/postfix
### Interface to listen on
### smtp banner
mail_name = davidsserver Daemon
smtpd_banner = $mail_name. All Spam Is Reported. ESMTP
### Who delivers the mail (never root for security).
setgid_group = postdrop
### Default user to deliver mail to (NEVER ENABLE)
luser_relay =
### The myorigin parameter specifies the domain that appears in mail that is posted on/through this machine.
append_dot_mydomain = no
append_at_myorigin = yes
### alias's
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
### the internet hostname of this mail system
myhostname = davidsserver
mydomain=com
### The mydestination parameter specifies what domains this machine will deliver locally, instead
### of forwarding to another machine. The default is to receive mail for the machine itself.
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
### Relay Host this mail server should send its mail to. (NONE)
relayhost = [smtp.comcast.net]:587
### Relay Client SASL Authentication
smtp_sasl_auth_enable = yes
smtp_sasl_security_options =
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
### External Networks to accept RELAYED mail from.
mynetworks = 127.0.0.0/8
### Where to send mail that is delivered locally.
mailbox_command = procmail -a "$EXTENSION"
### How much of the message in bytes will be bounced back to the sender.
bounce_size_limit = 5000
### No limit on mailbox size.
mailbox_size_limit = 0
### Message Restrictions
header_checks = regexp:/etc/postfix/header_checks
### Limit sent/recieved emails to 1 Meg "(header+body+attachment)x(mime-encoding) <= 1 meg"
message_size_limit = 102400
### How long do messages stay in the queue before being sent back to the sender. (in days)
### By default, postfix attempts to resend the message every (1000 secs)x(# attempts)x(days).
bounce_queue_lifetime = 4h
maximal_queue_lifetime = 4h
delay_warning_time = 1h
### Parrallel delivery force (local=2 and dest=20 are aggressive)
local_destination_concurrency_limit = 2
default_destination_concurrency_limit = 20
### Max flow rate (1 sec delay per 50 emails/sec over the number of emails delivered/sec)
in_flow_delay = 1s
### clients must send a HELO (or EHLO) command at the beginning of an SMTP session.
smtpd_helo_required = yes
### no one needs to ask our server who is on it
disable_vrfy_command = yes
#### user%domain != user@domain
allow_percent_hack = no
#### user!domain != user@domain
swap_bangpath = no
### delay until RCPT TO: to reject the email for nagios compatability
### Tarpit those bots/clients/spammers who send errors or scan for accounts !!!!
smtpd_error_sleep_time = 20
smtpd_soft_error_limit = 4
smtpd_hard_error_limit = 6
smtpd_junk_command_limit = 4
### Reject codes (change these as you see fit)
access_map_reject_code = 450
invalid_hostname_reject_code = 450
maps_rbl_reject_code = 450
multi_recipient_bounce_reject_code = 450
non_fqdn_reject_code = 450
plaintext_reject_code = 450
reject_code = 450
relay_domains_reject_code = 450
unknown_address_reject_code = 450
unknown_client_reject_code = 450
unknown_hostname_reject_code = 450
unknown_local_recipient_reject_code = 450
unknown_relay_recipient_reject_code = 450
unknown_virtual_alias_reject_code = 450
unknown_virtual_mailbox_reject_code = 450
unverified_recipient_reject_code = 450
unverified_sender_reject_code = 450
### SMTP Restrictions
smtpd_client_restrictions = permit_mynetworks,
reject_invalid_hostname,
check_client_access regexp:/etc/postfix/client_restrictions
reject_rbl_client zen.spamhaus.org,
reject_unknown_client,
permit
smtpd_helo_restrictions = permit_mynetworks,
check_helo_access hash:/etc/postfix/helo_access,
reject_unauth_pipelining,
reject_non_fqdn_hostname,
reject_invalid_hostname,
permit
smtpd_recipient_restrictions = permit_mynetworks reject_non_fqdn_sender reject_non_fqdn_recipient reject_non_fqdn_hostname reject_invalid_hostname reject_unauth_pipelining reject_rbl_client zen.spamhaus.org reject_unknown_sender_domain reject_unknown_recipient_domain reject_unauth_destination reject_unknown_client permit
smtpd_sender_restrictions = permit_mynetworks,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
reject_unknown_address,
permit
smtpd_etrn_restrictions = permit_mynetworks,
reject
smtpd_data_restrictions = reject_unauth_pipelining,
reject_multi_recipient_bounce,
permit
##################### END #####################################################
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