How to Set Up an Open Source Email Marketing Solution for Your Small Business: A Tutorial

Step 1: Choose Your Email Marketing Platform

For open source email marketing, Mautic is the clear winner. It's used by companies like Tesla and the NBA – but it's completely free (as in freedom). Mautic includes email campaigns, lead scoring, automation sequences, landing pages, forms, CRM capabilities, and detailed analytics. Other options include Listmono (simple newsletters), Sendy (Amazon SES integration), and PHPList (large lists). This tutorial focuses on Mautic because it's the most powerful and flexible for small businesses.

Step 2: Set Up Hosting (VPS or SolOPENpreneur)

Mautic requires a VPS with at least 2GB RAM and 20GB storage. If you're using SolOPENpreneur, Mautic is already installed and configured – you can skip to Step 4. If you're going DIY, choose a VPS provider (DigitalOcean, Contabo, Hetzner), install Ubuntu 22.04 or 24.04, and set up LAMP or LEMP stack (Apache/Nginx, MySQL, PHP 8.1+). Then download Mautic from mautic.org and follow the installation wizard.

For better performance, use the Docker version of Mautic. There are excellent Docker Compose files available on GitHub that include Mautic, MySQL, and Redis for caching.

Step 3: Configure Your Domain and SSL

Point a subdomain (e.g., mautic.yourbusiness.com) to your VPS IP address. Then set up SSL (HTTPS) using Let's Encrypt. If you're using SolOPENpreneur, this is automatic. If DIY, run Certbot to obtain a free SSL certificate. Mautic requires HTTPS for many features (like tracking pixels and forms).

Step 4: Log In and Complete Initial Setup

Access Mautic at your subdomain (e.g., mautic.yourbusiness.com). Log in with the admin credentials you created during installation. The first time you log in, Mautic will walk you through basic configuration: timezone, default email settings, and system info. Set your timezone correctly – it affects email send times and analytics.

Step 5: Configure Email Sending (SMTP or Amazon SES)

Mautic needs an email sending service. You have several options:

• SMTP from your VPS: Simplest but can trigger spam filters. Not recommended for high volume.
• Transactional email service: Use Postal SMTP (self‑hosted, included in SolOPENpreneur), or external services like SendGrid, Mailgun, or Amazon SES. Amazon SES is extremely cheap ($0.10 per 1,000 emails).
• Your own dedicated IP: For high volume, warm up your own IP and use Mautic's built‑SMTP.

To configure, go to Configuration → Email Settings. Enter your SMTP server details, port, and authentication. Send a test email to ensure it works. For SolOPENpreneur users, Postal SMTP is pre‑configured – you just need to add your domain.

Step 6: Create Your First Email List (Segment)

In Mautic, email lists are called "segments." Go to Segments → New. Give your segment a name (e.g., "Newsletter Subscribers"). Set filters – for now, leave it empty (you'll add contacts manually or via forms). Later, you can create dynamic segments based on behavior (e.g., "people who opened email but didn't click").

Step 7: Build a Lead Capture Form

You need a way to collect email addresses. Go to Components → Forms → New. Use the drag‑and‑drop builder to add fields (name, email, etc.). Under "Actions," set the form to add contacts to your segment and send a "Thank You" email. Under "Settings," get the embed code or direct URL. Place the form on your WordPress site using a plugin (like the Mautic integration plugin) or by pasting the embed code into a WordPress block (use a "Custom HTML" block).

Step 8: Create an Email Template

Consistent branding builds trust. Go to Channels → Emails → Templates → New. Choose a pre‑built template or start from scratch. Use the drag‑and‑drop editor to add your logo, colors, and standard footer (unsubscribe link, physical address). Save the template. You can also create plain text templates for more personal emails.

Step 9: Build Your First Email Campaign

Go to Channels → Emails → New. Select your template, enter a subject line, and write your content. Under "Segment," choose which list to send to. You can send immediately or schedule for later. For a simple newsletter, this is all you need. For automation, see the next step.

Step 10: Set Up an Automated Nurture Sequence (Campaign)

This is where Mautic shines. Go to Components → Campaigns → New. Design a visual workflow: when a contact is added to a segment, send a welcome email, wait 3 days, send a value email, wait 5 days, send a soft pitch, etc. You can add decision points: if they click a link, move them to a "hot leads" segment; if they don't open, send a different email. This automation runs 24/7 without manual work.

Use the campaign builder to drag and drop actions and conditions. Test the campaign with a test contact before activating.

Step 11: Track Results and Optimize

Mautic tracks opens, clicks, unsubscribes, and bounces. Go to Channels → Emails and click on any sent email to see its report. Pay attention to open rates (aim for 20‑40%) and click‑through rates (2‑10%). A/B test subject lines, send times, and content. Use the data to improve future campaigns.

Step 12: Integrate Mautic with Your Other Tools (n8n, WordPress, ERPNext)

Mautic's power multiplies when integrated. With SolOPENpreneur, Mautic is already connected to n8n, WordPress, and ERPNext. You can:

• Use n8n to trigger Mautic sequences from external events (e.g., abandoned cart in WooCommerce).
• Use the Mautic WordPress plugin to sync form submissions and track logged‑in users.
• Use ERPNext to pull customer data into Mautic segments based on purchase history.

If DIY, install the Mautic API plugin and use webhooks to connect to n8n or Zapier.