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How to Fix CSS Grid Broken Columns in Apple Mail (Desktop)
for Klaviyo Campaigns

A programmatic integration guide for resolving email rendering crashes inside Apple Mail (Desktop) using Klaviyo's layout editor environment.

Root Bug Analysis

Apple Mail (Desktop) uses the WebKit which lacks support for standard rendering rules. This causes CSS Grid Broken Columns elements to break or collapse when rendering templates.

Active rendering engine: WebKit

Klaviyo Specific Guide

Klaviyo's delivery wrapper can clean and restructure elements during import, creating dynamic spacing differences inside Apple Mail (Desktop).

Integration Step:

Open your Klaviyo template editor. Drag an 'HTML' block directly into your layout timeline (do not use a standard text box). Clear the default skeleton content inside the Klaviyo markup editor and paste the RenderOps corrected inline code.

ESP Unsubscribe Alignment

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

Klaviyo Unsubscribe Tag:{% unsubscribe %}

Documented Client Behavior

Expected layout behavior based on target rendering engine specifications:

Documented behavior: CSS Grid Broken Columns causes elements to stack vertically or clip in Apple Mail (Desktop) when templates are sent from Klaviyo.

Interactive Klaviyo Custom Sandbox

Target Environment: Apple Mail (Desktop)

Auto-compile fixes inside RenderOps Workspace

Load layout code directly into our Flexbox→Table Compiler to compile responsive table frameworks that display cleanly in Apple Mail (Desktop).

Launch Flexbox→Table Compiler

Fix CSS Grid Broken Columns on Other clients for Klaviyo