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How to Fix Custom Font Fallback Overrides in Gmail Web (Desktop)
for MJML Framework Campaigns

A programmatic integration guide for resolving email rendering crashes inside Gmail Web (Desktop) using MJML Framework's layout editor environment.

Root Bug Analysis

Gmail Web (Desktop) uses the Goog/WebKit Layout Engine which lacks support for standard rendering rules. This causes Custom Font Fallback Overrides elements to break or collapse when rendering templates.

Active rendering engine: Goog/WebKit Layout Engine

MJML Framework Specific Guide

MJML Framework's delivery wrapper can clean and restructure elements during import, creating dynamic spacing differences inside Gmail Web (Desktop).

Integration Step:

Wrap the entire RenderOps corrected table block inside an '<mj-raw>' tag block. This tells the MJML compiler to bypass parsing on this segment, exporting the exact conditional statements into the final HTML output.

ESP Unsubscribe Alignment

When compiling custom HTML templates for MJML Framework, you must ensure your layout retains deliverability compliance loops. MJML Framework requires you to insert their specific unsubscribe merge tag, otherwise your campaign delivery will be flagged by automated spam audits.

MJML Framework Unsubscribe Tag:{{unsubscribe_link}}

Documented Client Behavior

Expected layout behavior based on target rendering engine specifications:

Documented behavior: Custom Font Fallback Overrides causes elements to stack vertically or clip in Gmail Web (Desktop) when templates are sent from MJML Framework.

Interactive MJML Framework Custom Sandbox

Target Environment: Gmail Web (Desktop)

Auto-compile fixes inside RenderOps Workspace

Load layout code directly into our Font Stack Builder to compile responsive table frameworks that display cleanly in Gmail Web (Desktop).

Launch Font Stack Builder

Fix Custom Font Fallback Overrides on Other clients for MJML Framework