centos7-postfix-relay-gmail

centos7-postfix-relay-gmail.readme

# Guide setup postfix, mail relays on centos 7

## Install postfix

sudo yum install postfix
sudo vim /etc/postfix/main.cf

/*add to bottom*/

myhostname = relay.example.com
relayhost = [smtp.gmail.com]:587
smtp_use_tls = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt
smtp_sasl_security_options = noanonymous
smtp_sasl_tls_security_options = noanonymous

## Configuration sasl_passwd

sudo vim /etc/postfix/sasl_passwd

/*add line*/

[smtp.gmail.com]:587 <gmail-user>:<gmail-password>

sudo chown root:postfix /etc/postfix/sasl_passwd
sudo chmod 640 /etc/postfix/sasl_passwd
sudo getenforce && sudo getenforce 0

# Start postfix service

sudo systemctl start postfix

# Check log postfix

yum install postfix-pflogsumm
pflogsumm /var/log/maillog

# Reconfig
sudo dpkg-reconfigure postfix