---
title: MJML Email Pipeline
category: product
entity_type: skill
price: $15
canonical: https://forgehouse.ai/skills/mjml-email-pipeline/
lang: en
hreflang_alt: https://forgehouse.ai/tr/skiller/mjml-email-pipeline/
last_updated: 2026-06-20
---

# MJML Email Pipeline

> Compile MJML into inline-CSS HTML, dispatch through a batch transactional API, and authenticate with DKIM, SPF and DMARC for cross-client deliverability.

A production email pipeline that compiles MJML into inline-CSS HTML, dispatches through a batch transactional API, and authenticates with DKIM, SPF, and DMARC for top deliverability. It covers weekly client digests, formatted report emails, and onboarding magic links, all rendering correctly across Outlook, Gmail, and Apple Mail.

## Use cases
- Sending weekly automated client digest emails
- Building formatted monthly report emails
- Onboarding magic-link and password-reset transactional emails
- Auditing email deliverability across DKIM, SPF, and DMARC
- Ensuring cross-client rendering for Outlook, Gmail, and Apple Mail
- Handling bounces and complaints to protect sender reputation

## Benefits
- Land in the inbox, not the spam folder, with triple domain authentication
- Render flawlessly across legacy and modern email clients
- Cut email tooling cost dramatically versus heavier alternatives
- Prevent duplicate sends and protect reputation with idempotency and bounce handling

## What’s included
- MJML compile pipeline producing table-based, inline-CSS HTML
- Batch dispatch with idempotency keys and exponential-backoff retries
- DKIM, SPF, and DMARC DNS record templates with verification commands
- A bounce-and-complaint handling loop with hard and soft retry policy
- An email-client compatibility matrix with Outlook, Gmail, and dark-mode fixes
- A 16-row anti-pattern table covering the most common email rendering and deliverability mistakes

## Who it’s for
Agencies and SaaS teams sending transactional and recurring client emails who need inbox-grade deliverability and flawless cross-client rendering.

## How it runs
Outlook still renders email like it is 2003 and Gmail clips anything past 102KB. The pipeline accepts both constraints up front and compiles around them, all the way to inbox-event webhooks.
1. Authors the email in MJML: 600px max body, preview text in the head, native font stack only (web fonts die in Outlook), and every image with alt text because Outlook blocks images by default.
2. Compiles with mjml-cli in strict validation mode at build time, never at runtime: the semantic markup is expanded into table-based HTML with inlined CSS, minified, and checked against Gmail's 102KB clipping limit.
3. Injects per-recipient variables through templating, then hits the canary gate: any recipient not explicitly cleared for live sending is rerouted to the founder's inbox with a [CANARY] subject prefix for format approval before a customer ever sees it.
4. Dispatches through the Resend batch API with an idempotency key per recipient-period (so a retried cron can never double-send), one-click List-Unsubscribe headers, a plain-text alternative, and 3x exponential backoff on failure.
5. Closes the loop on webhooks: delivered, bounced, complained and opened events are written to an audit log; hard bounces permanently suppress the address and complaints force the recipient off live sending the same day.
6. Holds the quality bar with an external spam test target of 9-plus out of 10 and DMARC aggregate-report parsing that exits with an alarm if the authentication pass rate drops below 95 percent.

## FAQ
### Most of our recipients open mail in old Outlook builds. Will these emails survive that?
The compile step outputs table-based, inline-CSS HTML precisely because of clients like that, and a compatibility matrix documents Outlook, Gmail, and dark-mode fixes. Rendering quirks are treated as a first-class part of the pipeline, not an afterthought.

### What actually keeps our mail out of the spam folder?
Triple domain authentication: DKIM, SPF, and DMARC DNS record templates ship with verification commands, and a bounce-and-complaint handling loop protects sender reputation over time. Idempotency keys also prevent the duplicate sends that hurt trust.

### Is this a newsletter platform with a drag-and-drop editor?
No. It is a code-driven pipeline for transactional and recurring client emails: digests, report emails, and magic links. There is no visual editor, subscriber CRM, or campaign scheduler in it.

## Price
$15, one-time, no subscription. VAT included.

Related guide: [Building a multilingual AI content pipeline](https://forgehouse.ai/guides/ai-content-pipeline/)