Mail Server : Install Postfix2021/05/21

	Install Postfix to configure SMTP Server.
[1]	Install Postfix.

[root@mail ~]#

dnf -y install postfix

[2]	This example shows to configure SMTP-Auth to use Dovecot's SASL feature.

[root@mail ~]#

vi /etc/postfix/main.cf

# line 95 : uncomment and specify hostname

myhostname =

mail.srv.world

# line 102 : uncomment and specify domain name

mydomain =

srv.world

# line 118 : uncomment

myorigin = $mydomain

# line 135 : change

inet_interfaces =

all

# line 138 : change it if use only IPv4

inet_protocols =

ipv4

# line 183 : add

mydestination = $myhostname, localhost.$mydomain, localhost

, $mydomain

# line 283 : uncomment and specify your local network

mynetworks = 127.0.0.0/8,

10.0.0.0/24

# line 438 : uncomment (use Maildir)

home_mailbox = Maildir/

# line 593 : add

smtpd_banner = $myhostname ESMTP

# add to the end

# for example, limit an email size for 10M
message_size_limit = 10485760
# for example, limit a mailbox for 1G
mailbox_size_limit = 1073741824

# SMTP-Auth settings
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
smtpd_recipient_restrictions = permit_mynetworks, permit_auth_destination, permit_sasl_authenticated, reject

[root@mail ~]#

systemctl enable --now postfix

[3]	If Firewalld is running, allow SMTP service. SMTP uses [25/TCP].

[root@mail ~]#

firewall-cmd --add-service=smtp --permanent

success
[root@mail ~]#

firewall-cmd --reload

success

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