Google Search Verified Fix

How to Fix Outlook Button Border Collapsing 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 strips border-radius on anchor layouts and reduces the clickable area.

Active rendering engine: Microsoft Word (MSO)

HubSpot Specific Guide

HubSpot wraps CTAs in complex div elements that Outlook misaligns. Generate VML conditional buttons to bypass rendering bugs.

Integration Step:

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.

HubSpot Unsubscribe Tag:{{ unsubscribe_link }}

Documented Client Behavior

Expected layout behavior based on target rendering engine specifications:

Documented behavior: CSS border-radius is unsupported in MSO Word engine. Creating button rounded corners requires Microsoft-specific VML code blocks.

Interactive HubSpot Custom Sandbox

Target Environment: Outlook 2013

Paste Your Broken Code

<a href="{{ unsubscribe_link }}" style="background-color: #720e9e; border-radius: 6px; padding: 12px 24px;">Click Here</a>

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 VML Button Builder to compile responsive table frameworks that display cleanly in Outlook 2013.

Launch VML Button Builder

How to Fix Outlook Button Border Collapsing in Outlook 2013 for HubSpot Campaigns