Install Mailtrain Bulk Mailer Application on CentOS 7

Requirements
Metabase requires at least 1GB of RAM. All the required dependencies will be installed throughout the tutorial. You will need a minimal installation of CentOS 7 with root access on it. If you are logged in as a non-root user, you can run sudo -i to switch to root user.

Update Base System
Before installing any package it is recommended that you update the packages and repository using the following command.

yum -y update

Install Node.js
Node.js is required by Mailtrain as it is built using Nodemailer. Node.js is a very popular JavaScript runtime and Nodemailer is a module for Node.js applications to send emails.

Add Node.js 8.x repository:

curl --silent --location https://rpm.nodesource.com/setup_8.x | sudo bash -

Install Node.js.

yum -y install nodejs

Install MariaDB
To store Mailtrain database we will need to install MariaDB. MariaDB is a fork of MySQL
Install MariaDB repository into your system.

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Install Mailtrain Mail Marketer Software on Ubuntu 16.04 – Auto Installation

Mailtrain is a self hosted newsletter application built on Node.js (v5+) and MySQL (v5.5+ or MariaDB). Mailtrain supports subscriber list management, list segmentation, custom fields, email templates, large CSV list import files, etc.

Requirements

  • Nodejs v5+
  • MySQL v5.5 or MariaDB
  • Redis (optional, disabled by default, used only for session storage)

Automatic installation on Ubuntu 16.04
You can download and run install.sh in your blank Ubuntu VPS to set up. Mailtrain and all required dependencies (including MySQL). The installation script assumes a somewhat blank server, so if this is a machine you are already using for something else, you might want to skip the automatic install and proceed manually.

If you like living on the edge and feel adventurous you can run the installation script directly from your command line as root:

curl https://raw.githubusercontent.com/andris9/mailtrain/master/setup/install.sh | sudo bash

Install script installs and sets up the following:

  • Node.js (version 6.x)
  • MariaDB (the default version from apt-get)
  • Mailtrain (from the master branch) on port 80
  • UFW firewall that blocks everything besides ports 22, 25, 80, 443
  • ZoneMTA to queue and deliver messages (NB! using ZoneMTA assumes that outgoing port 25 is open which might not be the case on some hosts like on the Google Cloud)Redis server for session cache
  • logrotate to rotate Mailtrain log files
  • upstart or systemd init script to automatically start and manage Mailtrain process

After the install script has finished and you see a success message then you should have a Mailtrain instance running at http://yourdomain.com

Next steps after installation

1. Change admin password
Navigate to http://yourdomain.com where yourdomain.com is the address of your server. Click on the Sign In link in the right top corner of the page. Authenticate with the following credentials:

Username: admin
Password: test
Once authenticated, click on your username in the right top corner of the page and select “Account”. Now you should be able to change your default password.

2. Update page configuration
If signed in navigate to http://yourdomain.com/settings and check that all email addresses and domain names are correct. Mailtrain default installation comes bundled with ZoneMTA, so you should be able to send out messages right away. ZoneMTA even handles a lot of bounces (not all kind of bounces though) automatically so you do not have to change anything in the SMTP settings to get going.

3. Set up SPF
If you are using the bundled ZoneMTA then you need to add your Mailtrain host to the SPF DNS record of your sending domain. So if you are sending messages as “info@example.com” then the domain “example.com” should have a SPF DNS record that points to the IP address or hostname of your Mailtrain host. Everything should work without the SPF record but setting it up correctly improves the deliverability a lot.

4. Set up DKIM
If you are using the bundled ZoneMTA then you can provide a DKIM key to sign all outgoing messages. You can provide the DKIM private key in Mailtrain Settings page. This key is only used by ZoneMTA, so if you are using some other provider then you check your providers’ documentation to see how to set up DKIM. In case of ZoneMTA you only need to open Mailtrain Settings page, scroll to DKIM config section and fill the fields for DKIM selector and DKIM private key. Everything should work without the DKIM signatures but setting it up correctly improves the deliverability a lot.

5. Set up VERP
The bundled ZoneMTA can already handle a large amount of bounces if you use it to deliver messages but not all – namely such bounces that happen after the recipient MX accepts the message for local delivery. This might happen for example when a user exists, so the MX accepts the message but the quota for that user is checked only when actually storing the message to users’ mailbox. Then a bounce message is generated and sent to the original sender which in your case is the mail address you are sending your list messages from. You can catch these messages and mark such recipients manually as bounced but alternatively you can set up a VERP based bounce handler that does this automatically. In this case the sender on the message envelope would not be your actual address but a rewritten bounce address that points to your Mailtrain installation.

To set it up you need to create an additonal DNS MX entry for a bounce domain, eg “bounces.example.com” if you are sending from “example.com”. This entry should point to your Mailtrain server IP address. Next you should enable the VERP handling in Mailtrain Settings page.

As ZoneMTA uses envelope sender as the default for DKIM addresses, then if using VERP you need to set up DKIM to your bounce domain instead of sender domain and also store the DKIM key as “bouncedomain.selector.pem” in the ZoneMTA key folder.
If you do not use VERP with ZoneMTA then you should get notified most of the bounces so everything should mostly work without it

6. Set up proper PTR record
If you are using the bundled ZoneMTA then you should make sure you are using a proper PTR record for your server. For example if you use DigitalOcean then PTR is set automatically (it’s the droplet name, so make sure your droplet name is the same as the domain name you are running Mailtrain from). If you use AWS then you can request setting up PTR records using this form (requires authentication). Otherwise you would have to check from your service provider, hot to get the PTR record changed. Everything should work without the PTR record but setting it up correctly improves the deliverability a lot.

7. Ready to send!
With proper SPF, DKIM and PTR records (DMARC wouldn’t hurt either) I got perfect 10/10 score out from MailTester when sending a campaign message to a MailTester test address. I did not have VERP turned on, so the sender address matched return path address.

Src: https://www.diycode.cc/projects/andris9/mailtrain

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