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Fix CSS Flexbox Collapse in Samsung Email — Mailchimp Guide

A programmatic integration guide for resolving email rendering crashes inside Samsung Email using Mailchimp's layout editor environment.

Root Bug Analysis

Samsung Email uses the WebKit which lacks support for standard rendering rules. This causes CSS Flexbox Collapse elements to break or collapse when rendering templates.

Active rendering engine: WebKit

Mailchimp Specific Guide

Mailchimp's delivery wrapper can clean and restructure elements during import, creating dynamic spacing differences inside Samsung Email.

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: CSS Flexbox Collapse causes elements to stack vertically or clip in Samsung Email when templates are sent from Mailchimp.

Interactive Mailchimp Custom Sandbox

Target Environment: Samsung Email

Paste Your Broken Code

<div style="display: flex; justify-content: space-between;">
  <div style="width: 280px; padding: 20px;">Column 1</div>
  <div style="width: 280px; padding: 20px;">Column 2</div>
</div>

RenderOps Compiled Output

<!-- Paste code on the left and click compile to output clean fallback tags -->

Auto-compile fixes inside RenderOps Workspace

Load layout code directly into our Retrofit Compiler to compile responsive table frameworks that display cleanly in Samsung Email.

Launch Retrofit Compiler