apt update && apt upgrade -y

hostnamectl set-hostname mail.yourdomain.com

apt-get install mariadb-server libmysqlclient-dev -y

mysql_secure_installation

    Enter current password for root (enter for none):
    Set root password? [Y/n]: N
    Remove anonymous users? [Y/n]: Y
    Disallow root login remotely? [Y/n]: Y
    Remove test database and access to it? [Y/n]:  Y
    Reload privilege tables now? [Y/n]:  Y

mysql -u root -p

CREATE DATABASE postal CHARSET utf8mb4 COLLATE utf8mb4_unicode_ci;
CREATE USER 'postaluser'@'localhost' IDENTIFIED BY 'your_password';

GRANT ALL ON postal.* TO 'postaluser'@'localhost';
GRANT ALL PRIVILEGES ON `postal-%`.* to `postaluser`@`localhost` IDENTIFIED BY "password";

FLUSH PRIVILEGES;
QUIT;

apt-get install software-properties-common -y
apt-add-repository ppa:brightbox/ruby-ng

apt-get update -y
apt-get install ruby2.3 ruby2.3-dev build-essential -y

wget -O- https://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc | apt-key add -

echo "deb https://packages.erlang-solutions.com/ubuntu bionic contrib" | tee /etc/apt/sources.list.d/erlang.list

apt-get update -y
apt-get install erlang -y

wget -O- https://dl.bintray.com/rabbitmq/Keys/rabbitmq-release-signing-key.asc | apt-key add -
wget -O- https://www.rabbitmq.com/rabbitmq-release-signing-key.asc | apt-key add -

echo "deb https://dl.bintray.com/rabbitmq/debian $(lsb_release -sc) main" | tee /etc/apt/sources.list.d/rabbitmq.list

apt-get update -y
apt-get install rabbitmq-server -y

systemctl status  rabbitmq-server

rabbitmqctl add_vhost /postal
rabbitmqctl add_user postal password
rabbitmqctl set_permissions -p /postal postal ".*" ".*" ".*"

curl -sL https://deb.nodesource.com/setup_10.x | bash

apt-get install nodejs -y

useradd -r -m -d /opt/postal -s /bin/bash postal

setcap 'cap_net_bind_service=+ep' /usr/bin/ruby2.3

gem install bundler

gem install procodile

gem install nokogiri -v '1.7.2'

apt install git -y

mkdir -p /opt/postal/app

wget https://postal.atech.media/packages/stable/latest.tgz

tar zpxvf latest.tgz -C /opt/postal/app

chown -R postal:postal /opt/postal

ln -s /opt/postal/app/bin/postal /usr/bin/postal

postal bundle /opt/postal/vendor/bundle

cd /opt/postal/app
bundle update mimemagic
bundle install
cd ~

postal initialize-config

nano /opt/postal/config/postal.yml

web:
  host: postal.example.com
  # The protocol that requests to the management interface should happen on
  protocol: https

main_db:
  # Specify the connection details for your MySQL database
  host: localhost
  username: postal
  password: password
  database: postal

message_db:
  # Specify the connection details for your MySQL server that will be house the
  # message databases for mail servers.
  host: localhost
  username: postal
  password: password
  prefix: postal

rabbitmq:
  # Specify the connection details for your RabbitMQ server.
  host: 127.0.0.1
  username: postal
  password: password
  vhost: /postal
  
dns:
  # Specifies the DNS record that you have configured. Refer to the documentation at
  # https://github.com/atech/postal/wiki/Domains-&-DNS-Configuration for further
  # information about these.
  mx_records:
    - mx.postal.example.com
  smtp_server_hostname: postal.example.com
  spf_include: spf.postal.example.com
  return_path: rp.postal.example.com
  route_domain: routes.postal.example.com
  track_domain: track.postal.example.com

smtp:
  # Specify an SMTP server that can be used to send messages from the Postal management
  # system to users. You can configure this to use a Postal mail server once the
  # your installation has been set up.
  host: 127.0.0.1
  port: 2525
  username: # Complete when Postal is running and you can
  password: # generate the credentials within the interface.
  from_name: Postal
  from_address: [email protected]

postal initialize

postal make-user

Postal User Creator
Enter the information required to create a new Postal user.
This tool is usually only used to create your initial admin user.

E-Mail Address      : [email protected]
First Name          : Admin
Last Name           : Postal
Initial Password:   : *********

User has been created with e-mail address [email protected]

postal start

postal status

postal stop

nano /etc/systemd/system/postal.service

[Unit]
Description=Postal Mail Platform
After=mysql.service rabbitmq-server.service
Wants=mysql.service rabbitmq-server.service

[Service]
ExecStart=/usr/bin/postal start
ExecStop=/usr/bin/postal stop
ExecReload=/usr/bin/postal restart
User=postal
Restart=on-failure
Type=forking

[Install]
WantedBy=mysql.service rabbitmq-server.service

systemctl daemon-reload

systemctl start postal 
systemctl enable postal 

systemctl status postal

apt-get install nginx openssl -y

cp /opt/postal/app/resource/nginx.cfg /etc/nginx/sites-available/default

mkdir /etc/nginx/ssl/
openssl req -x509 -newkey rsa:4096 -keyout /etc/nginx/ssl/postal.key -out /etc/nginx/ssl/postal.cert -days 365 -nodes

Generating a 4096 bit RSA private key
...............................++
.................++
writing new private key to '/etc/nginx/ssl/postal.key'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [AU]:IN
State or Province Name (full name) [Some-State]:Bihar
Locality Name (eg, city) []:Patna
Organization Name (eg, company) [Internet Widgits Pty Ltd]:IT
Organizational Unit Name (eg, section) []:IT
Common Name (e.g. server FQDN or YOUR name) []:Dhiraj
Email Address []:[email protected]

nano /etc/nginx/sites-available/default

server_name postal.example.com;

systemctl restart nginx