How to Fix Custom Font Fallback Overrides in Outlook 2013
for HubSpot Campaigns
A programmatic integration guide for resolving email rendering crashes inside Outlook 2013 using HubSpot's layout editor environment.
Root Bug Analysis
Outlook 2013 uses the Microsoft Word (MSO) which lacks support for standard rendering rules. This causes Custom Font Fallback Overrides elements to break or collapse when rendering templates.
HubSpot Specific Guide
HubSpot's delivery wrapper can clean and restructure elements during import, creating dynamic spacing differences inside Outlook 2013.
In HubSpot's Design Manager, edit the modules section. Create a 'Rich Text' or 'HTML' module block. Double-click the block, choose 'Tools' or 'Advanced', click 'Source Code', and drop the code snippet inside.
ESP Unsubscribe Alignment
When compiling custom HTML templates for HubSpot, you must ensure your layout retains deliverability compliance loops. HubSpot requires you to insert their specific unsubscribe merge tag, otherwise your campaign delivery will be flagged by automated spam audits.
{{ unsubscribe_link }}Documented Client Behavior
Expected layout behavior based on target rendering engine specifications:
Auto-compile fixes inside RenderOps Workspace
Load layout code directly into our Font Stack Builder to compile responsive table frameworks that display cleanly in Outlook 2013.