Drupal SMTP email system with Twig templates for transactional emails
This project involved implementing a transactional email system in Drupal that could deliver reliable notifications using SMTP while maintaining flexible email templates.
The client required a solution that allowed dynamic HTML email templates while ensuring reliable email delivery.
Project context
The website needed to send several types of automated notifications, including:
- user activity alerts;
- response notifications;
- system status updates.
However, the existing email system had several limitations:
- email templates were difficult to customize;
- HTML email formatting was inconsistent;
- delivery reliability needed improvement.
Scope and goals
The goal was to implement a robust email notification system with:
- reliable SMTP email delivery;
- reusable Twig-based email templates;
- flexible dynamic content insertion.
Tech stack
- Drupal CMS
- SMTP email delivery
- Twig templating system
- HTML transactional email templates
Email architecture
The system was designed so that Drupal would generate email content using Twig templates.
This approach allowed developers to define clean, reusable templates while inserting dynamic data such as:
- user names
- links
- notification context
- system messages
Twig made it possible to maintain a consistent layout across all emails.
SMTP integration
Instead of relying on basic mail delivery, the system used SMTP-based email sending.
SMTP delivery provided several advantages:
- improved reliability;
- better compatibility with email providers;
- predictable email formatting.
This ensured that important notifications consistently reached users.
Template flexibility
Using Twig templates allowed the project to support:
- dynamic content blocks;
- reusable layout structures;
- consistent email branding.
Developers could easily modify email layouts without rewriting application logic.
Result
The new email system delivered:
- reliable SMTP email delivery;
- structured Twig-based templates;
- consistent formatting across notifications.
Editors and administrators gained a predictable notification system that could easily evolve as the platform grew.
What this case demonstrates
Email notifications are a critical part of many web platforms.
By combining SMTP delivery with Twig templating, Drupal projects can build scalable transactional email systems that remain flexible and maintainable.
FAQ
Does Drupal support SMTP email sending?+
Yes. Drupal can send emails through SMTP servers, which improves reliability and compatibility with email providers.
Can Twig be used for Drupal email templates?+
Yes. Twig templates can be used to generate dynamic HTML email content with reusable layouts and structured data.
Why use SMTP instead of default email sending?+
SMTP delivery provides better reliability, improved email deliverability, and more consistent formatting.