April 5, 2016 – HP Server

Postfix will not start? Error Code 89

Using CENTOS 7 / WEBMIN / VIRTUALMIN / POSTFIX / DEVOCOT

Postfix is installed even if CentOS system was installed with [Minimal Install], but if Postfix is not, Install it first like follows.

[root@mail ~]#
yum -y install postfix

This example shows how to configure SMTP-Auth to use Dovecot’s SASL function.

Edit the main.cf file

/etc/postfix/main.cf

Make sure that the following line of code is set like this…

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

[root@mail ~]#

vi /etc/postfix/main.cf

# line 75: uncomment and specify hostname

myhostname =mail.server.world

# line 83: uncomment and specify domain name

mydomain = server.world

# line 99: uncomment

myorigin = $mydomain

# line 116: change

inet_interfaces = all

# line 164: add

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain

# line 264: uncomment and specify your local network

mynetworks = 127.0.0.0/8, 10.0.0.0/24

# line 419: uncomment (use Maildir)

home_mailbox = Maildir/

# line 574: add

smtpd_banner = $myhostname ESMTP

# add follows to the end

# limit an email size for 10M

message_size_limit = 10485760

# limit a mailbox for 1G

mailbox_size_limit = 1073741824

# for SMTP-Auth

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 restart postfix

[root@mail ~]#
systemctl enable postfix