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Outlook Email Broken Layout Fix: Resolve Outlook Button Border Collapsing

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

Root Bug Analysis

Outlook App (iOS & Android) uses the WebKit / Blink Wrapper which lacks support for standard rendering rules. This causes Outlook Button Border Collapsing elements to break or collapse when rendering templates.

Active rendering engine: WebKit / Blink Wrapper

Campaign Monitor Specific Guide

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

Integration Step:

In Campaign Monitor, click the 'Source' button on your selected editable text region, or edit the template code files directly. Ensure you append the 'class="cs-editable"' flag if you need inline editing later.

ESP Unsubscribe Alignment

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

Campaign Monitor Unsubscribe Tag:[unsubscribe]

Documented Client Behavior

Expected layout behavior based on target rendering engine specifications:

Documented behavior: Outlook Button Border Collapsing causes elements to stack vertically or clip in Outlook App (iOS & Android) when templates are sent from Campaign Monitor.

Interactive Campaign Monitor Custom Sandbox

Target Environment: Outlook App (iOS & Android)

Auto-compile fixes inside RenderOps Workspace

Load layout code directly into our VML Button Builder to compile responsive table frameworks that display cleanly in Outlook App (iOS & Android).

Launch VML Button Builder

Fix Outlook Button Border Collapsing on Other clients for Campaign Monitor