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USE CASE Target

Fix Outlook Background Image Collapse in Yahoo Mail — Brevo (Sendinblue) Guide for B2B Cold Outreach

B2B cold outreach templates demand maximum deliverability and a plain-text appearance. Heavy, broken CSS structures or HTML syntax issues trigger spam filters instantly. Below is the targeted integration guide to fix Outlook Background Image Collapse inside Yahoo Mail templates when using Brevo (Sendinblue).

Technical Breakdown

Yahoo Mail uses the WebKit / Blink Web Wrapper which lacks support for standard rendering rules. This causes Outlook Background Image Collapse elements to break or collapse when rendering templates.

Brevo (Sendinblue) Behaviors

Brevo's rendering system injects inline spacing helpers to support their responsive editor, which can cause column overlaps in Outlook. Using explicit table alignments is required. For cold sales outreach, minimize VML structures and prioritize light, standard text blocks to maximize inbox placement on corporate enterprise filters.

Remediation Code Block

To resolve this in Outlook desktop, you must wrap your element or cell inside a Microsoft VML (Vector Markup Language) shapes structure that declares the background image explicitly using the 'v:background' or 'v:fill' vector properties. In your Brevo (Sendinblue) campaign manager, make sure you configure your links to run via {{ unsubscribe }}.

<td background="https://example.com/bg.jpg" bgcolor="#222222" valign="top" style="background-image: url('https://example.com/bg.jpg'); background-repeat: no-repeat; background-size: cover;">
  <!--[if mso]>
  <v:rect xmlns:v="urn:schemas-microsoft-com:vml" fill="true" stroke="false" style="width:600px;height:300px;">
    <v:fill type="tile" src="https://example.com/bg.jpg" color="#222222" />
    <v:textbox inset="0,0,0,0">
  <![endif]-->
  <div>Overlay Content</div>
  <!--[if mso]>
    </v:textbox>
  </v:rect>
  <![endif]-->
</td>

Live Code Sandbox Test

Interactive Brevo (Sendinblue) Custom Sandbox

Target Environment: Yahoo Mail

How to Deploy inside Brevo (Sendinblue)

1

Copy the fixed VML or table wrapper code block from the remediation box above.

2

Open Brevo's template canvas, select the element you wish to configure, click 'Edit HTML' or insert a standalone 'HTML' content block, and paste the code.

Targeted Fixes by Use Case & Industry