How to Fix CSS Flexbox Collapse in Outlook 2016
for SendGrid Campaigns
A programmatic integration guide for resolving email rendering crashes inside Outlook 2016 using SendGrid's layout editor environment.
Root Bug Analysis
Outlook 2016 uses the Microsoft Word (MSO) which lacks support for standard rendering rules. This causes CSS Flexbox Collapse elements to break or collapse when rendering templates.
SendGrid Specific Guide
SendGrid's delivery wrapper can clean and restructure elements during import, creating dynamic spacing differences inside Outlook 2016.
Open SendGrid Design Editor, toggle the view mode to Code Editor, or insert a custom 'Code' module block inside your drag-and-drop layout. Drop the corrected code inside the box.
ESP Unsubscribe Alignment
When compiling custom HTML templates for SendGrid, you must ensure your layout retains deliverability compliance loops. SendGrid requires you to insert their specific unsubscribe merge tag, otherwise your campaign delivery will be flagged by automated spam audits.
{{{unsubscribe}}}Documented Client Behavior
Expected layout behavior based on target rendering engine specifications:
Auto-compile fixes inside RenderOps Workspace
Load layout code directly into our Retrofit Compiler to compile responsive table frameworks that display cleanly in Outlook 2016.