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How to Fix Default Image Blocking Layouts in Gmail App (iOS & Android)
for Mailchimp Campaigns

A programmatic integration guide for resolving email rendering crashes inside Gmail App (iOS & Android) using Mailchimp's layout editor environment.

Root Bug Analysis

Gmail App (iOS & Android) uses the WebKit / Blink which lacks support for standard rendering rules. This causes Default Image Blocking Layouts elements to break or collapse when rendering templates.

Active rendering engine: WebKit / Blink

Mailchimp Specific Guide

Mailchimp's delivery wrapper can clean and restructure elements during import, creating dynamic spacing differences inside Gmail App (iOS & Android).

Integration Step:

Locate your campaign block inside Mailchimp. Drag a 'Code' block into your canvas workspace. Toggle the editor view to Source, paste the optimized code, and click Save.

ESP Unsubscribe Alignment

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

Mailchimp Unsubscribe Tag:*|UNSUB|*

Documented Client Behavior

Expected layout behavior based on target rendering engine specifications:

Documented behavior: Default Image Blocking Layouts causes elements to stack vertically or clip in Gmail App (iOS & Android) when templates are sent from Mailchimp.

Interactive Mailchimp Custom Sandbox

Target Environment: Gmail App (iOS & Android)

Auto-compile fixes inside RenderOps Workspace

Load layout code directly into our Image→Base64 Encoder to compile responsive table frameworks that display cleanly in Gmail App (iOS & Android).

Launch Image→Base64 Encoder

Fix Default Image Blocking Layouts on Other clients for Mailchimp