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Wednesday 6 November 2019

Configure Postfix server (4/7)

Configure Postfix server (4/7)

# Create a backup file of main.cf and master.cf files.


[root@mailserver ~]# cd /etc/postfix
[root@mailserver postfix]# cat main.cf > main.cf.org
[root@mailserver postfix]# cat master.cf > master.cf.org

# Create new file main.cf

[root@mailserver sql]# vim /etc/postfix/main.cf
[root@mailserver sql]# cat /etc/postfix/main.cf
myhostname = mailserver.example.com
mydomain = example.com
myorigin = $mydomain
inet_interfaces = all
inet_protocols = ipv4
mynetworks_style = host
mynetworks = $config_directory/mynetworks
smtpd_banner = $myhostname ESMTP $mail_name
# ---------------------- VIRTUAL DOMAINS START ----------------------
virtual_alias_maps = proxy:mysql:$config_directory/sql/virtual_alias_maps.cf
virtual_mailbox_domains = proxy:mysql:$config_directory/sql/virtual_domains_maps.cf
virtual_mailbox_maps = proxy:mysql:$config_directory/sql/virtual_mailbox_maps.cf
#virtual_mailbox_limit_maps = proxy:mysql:$config_directory/sql/virtual_mailbox_limit_maps.cf
virtual_mailbox_base = /home/mail
virtual_uid_maps = static:8
virtual_gid_maps = static:12
mailbox_size_limit = 104857600
message_size_limit = 104857600
relay_domains = proxy:mysql:$config_directory/sql/relay_domains.cf
relay_recipient_maps = proxy:mysql:$config_directory/sql/relay_recipient_maps.cf
transport_maps = proxy:mysql:$config_directory/sql/transport_maps.cf
#transport_maps = hash:$config_directory/transport
#virtual_transport = dovecot
dovecot_destination_recipient_limit = 1
# ----------------------- VIRTUAL DOMAINS END -----------------------
# ------------------------- SASL PART START -------------------------
broken_sasl_auth_clients = yes
smtpd_helo_required = yes
smtpd_client_restrictions = permit_sasl_authenticated
smtpd_sender_restrictions = permit_sasl_authenticated
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
smtpd_sasl_type = dovecot
# Can be an absolute path, or relative to $queue_directory
smtpd_sasl_path = private/auth
# -------------------------- SASL PART END --------------------------
# -------------------------- TLS PART START -------------------------
smtpd_use_tls = yes
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/pki/tls/certs/mailserver.example.com.crt
smtpd_tls_key_file = /etc/pki/tls/certs/mailserver.example.com.key
smtpd_tls_received_header = yes
smtpd_tls_loglevel = 1
tls_random_source = dev:/dev/urandom
# --------------------------- TLS PART END --------------------------
# ------------------ SMTPD RESTRICTIONS PART START ------------------
disable_vrfy_command = yes
non_fqdn_reject_code = 450
invalid_hostname_reject_code = 450
maps_rbl_reject_code = 450
unverified_sender_reject_code = 550
#header_checks = pcre:$config_directory/header_checks
#body_checks = pcre:$config_directory/body_checks
#warning: the restrictions reject_unknown_(sender|recipient)_domain
#will trigger if your DNS becomes unavailable
smtpd_recipient_restrictions =
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
reject_invalid_helo_hostname
warn_if_reject reject_non_fqdn_helo_hostname
warn_if_reject reject_unknown_helo_hostname
warn_if_reject reject_unknown_client
reject_non_fqdn_sender
reject_non_fqdn_recipient
reject_unknown_sender_domain
reject_unknown_recipient_domain
check_client_access hash:$config_directory/rbl_override
reject_rbl_client zen.spamhaus.org
reject_rbl_client bl.spamcop.net
reject_rbl_client dnsbl.sorbs.net=127.0.0.2
reject_rbl_client dnsbl.sorbs.net=127.0.0.3
reject_rbl_client dnsbl.sorbs.net=127.0.0.4
reject_rbl_client dnsbl.sorbs.net=127.0.0.5
reject_rbl_client dnsbl.sorbs.net=127.0.0.7
reject_rbl_client dnsbl.sorbs.net=127.0.0.9
reject_rbl_client dnsbl.sorbs.net=127.0.0.11
reject_rbl_client dnsbl.sorbs.net=127.0.0.12
permit
smtpd_data_restrictions =
permit_mynetworks,
reject_unauth_pipelining,
reject_multi_recipient_bounce,
permit
# ------------------- SMTPD RESTRICTIONS PART END --------------------


Create below line in master.cf file

[root@mailserver sql]# vim /etc/postfix/master.cf
[root@mailserver sql]# cat /etc/postfix/master.cf
#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - n - - smtpd
#smtp inet n - n - 1 postscreen
#smtpd pass - - n - - smtpd
#dnsblog unix - - n - 0 dnsblog
#tlsproxy unix - - n - 0 tlsproxy
#submission inet n - n - - smtpd
# -o syslog_name=postfix/submission
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
smtps inet n - n - - smtpd
-o syslog_name=postfix/smtps
-o smtpd_tls_wrappermode=yes
-o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
-o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - n - - qmqpd
pickup unix n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - n 1000? 1 tlsmgr
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
trace unix - - n - 0 bounce
verify unix - - n - 1 verify
flush unix n - n 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - n - - smtp
relay unix - - n - - smtp
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - n - - showq
error unix - - n - - error
retry unix - - n - - error
discard unix - - n - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - n - - lmtp
anvil unix - - n - 1 anvil
scache unix - - n - 1 scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
#maildrop unix - n n - - pipe
# flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus unix - n n - - pipe
# user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
#
# Old example of delivery via Cyrus.
#
#old-cyrus unix - n n - - pipe
# flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
#uucp unix - n n - - pipe
# flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# ====================================================================
#
# Other external delivery methods.
#
#ifmail unix - n n - - pipe
# flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
#
#bsmtp unix - n n - - pipe
# flags=Fq. user=bsmtp argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
#
#scalemail-backend unix - n n - 2 pipe
# flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store
# ${nexthop} ${user} ${extension}
#
#mailman unix - n n - - pipe
# flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
# ${nexthop} ${user}
#
# add line for dovecot
dovecot unix - n n - - pipe
flags=DRhu user=mail:mail argv=/usr/libexec/dovecot/deliver -d ${recipient}

[root@mailserver postfix]#

[root@mailserver ~]# vim /etc/postfix/mynetworks
[root@mailserver ~]# cat /etc/postfix/mynetworks
# This specifies the list of subnets that Postfix considers as
# "trusted" SMTP clients that have more privileges than "strangers".
#
# In particular, "trusted" SMTP clients are allowed to relay mail
# through Postfix.
#
# Be sure to add your public ip address block if needed.
#
127.0.0.0/8
192.168.10.0/24
[root@mailserver ~]#

[root@mailserver ~]# vim /etc/postfix/rbl_override
[root@mailserver ~]# cat /etc/postfix/rbl_override
mailserver.example.com OK
192.168.10.0/24 OK

[root@mailserver ~]# postmap /etc/postfix/rbl_override

Create new folder in /etc/postfix/sql

[root@mailserver postfix]# mkdir sql
[root@mailserver postfix]# cd /etc/postfix/sql
[root@mailserver sql]#

[root@mailserver sql]# vim /etc/postfix/sql/virtual_alias_maps.cf
[root@mailserver sql]# cat /etc/postfix/sql/virtual_alias_maps.cf
hosts = localhost
dbname = maildb
user = mailuser
password = redhat
table = alias
select_field = goto
where_field = address
additional_conditions = AND active = '1'
[root@mailserver sql]#

[root@mailserver sql]# vim /etc/postfix/sql/virtual_domains_maps.cf
[root@mailserver sql]# cat /etc/postfix/sql/virtual_domains_maps.cf
hosts = localhost
dbname = maildb
user = mailuser
password = redhat
table = domain
select_field = description
where_field = domain
additional_conditions = AND backupmx = '0' AND active = '1'
[root@mailserver sql]#

[root@mailserver sql]# vim /etc/postfix/sql/virtual_mailbox_maps.cf
[root@mailserver sql]# cat /etc/postfix/sql/virtual_mailbox_maps.cf
hosts = localhost
dbname = maildb
user = mailuser
password = redhat
table = mailbox
select_field = maildir
where_field = username
additional_conditions = AND active = '1'

[root@mailserver sql]#


[root@mailserver sql]# vim /etc/postfix/sql/virtual_mailbox_limit_maps.cf
[root@mailserver sql]# cat /etc/postfix/sql/virtual_mailbox_limit_maps.cf
hosts = localhost
dbname = maildb
user = mailuser
password = redhat
table = mailbox
select_field = quota
where_field = username
additional_conditions = AND active = '1'
[root@mailserver sql]#


[root@mailserver sql]# vim /etc/postfix/sql/relay_domains.cf
[root@mailserver sql]# cat /etc/postfix/sql/relay_domains.cf
hosts = localhost
dbname = maildb
user = mailuser
password = redhat
table = domain
select_field = domain
where_field = domain
additional_conditions = AND backupmx = '1' AND active = '1'
[root@mailserver sql]#

[root@mailserver sql]# vim /etc/postfix/sql/relay_recipient_maps.cf
[root@mailserver sql]# cat /etc/postfix/sql/relay_recipient_maps.cf
hosts = localhost
dbname = maildb
user = mailuser
password = redhat
table = alias
select_field = goto
where_field = address
additional_conditions = AND active = '1'

[root@mailserver sql]#

[root@mailserver sql]# vim /etc/postfix/sql/transport_maps.cf
[root@mailserver sql]# cat /etc/postfix/sql/transport_maps.cf
hosts = localhost
dbname = maildb
user = mailuser
password = redhat
table = domain
select_field = transport
where_field = domain
additional_conditions = AND active = '1'
[root@mailserver sql]#

[root@mailserver sql]# chown root:postfix /etc/postfix/sql/ -R

[root@mailserver sql]# chcon -u system_u /etc/postfix/sql -R

[root@mailserver sql]# chmod 0640 /etc/postfix/sql/*.cf

[root@mailserver sql]# chmod 0750 /etc/postfix/sql/

[root@mailserver sql]# newaliases


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