PDF Conversion Issues

Fix Broken Inline Images When Converting Outlook Emails to PDF

John WilsonJohn Wilson Nov 2, 2026 869 views

Question details

Users experience broken inline images when converting an Outlook email to PDF if the email was opened directly from an attachment.

Fix Broken Inline Images When Converting Outlook Emails to PDF
Product
Microsoft Outlook
Device & OS
not provided
Scenario
Converting attached Outlook emails containing inline images into a PDF format.
Observed behavior
Inline images fail to render in the resulting PDF, instead appearing as attachment links or blank boxes with X marks.
Before you start

Verify that your Microsoft Outlook application and PDF conversion software are fully updated to rule out known image rendering bugs.

Solution 1Recommended

Forward the Email to Your Inbox Before Conversion

Bypass the attachment rendering issue by forwarding the email to your own inbox before converting it to PDF.

When an email is opened as an attachment inside another email, Outlook may fail to properly resolve the Content IDs (CIDs) of inline images. Forwarding the message forces Outlook to download and render the images correctly in a standard message view.

1
Forward the attached email

Open the parent email containing the attachment. Right-click the attached message file (.msg) and select 'Forward'. Address the email to yourself and click Send.

2
Open the forwarded email

Navigate to your main Inbox, locate the newly forwarded email, and open it. Ensure all inline images are fully loaded and visible on the screen.

3
Convert to PDF

Use your PDF conversion tool or the native 'Print to PDF' function within Outlook to convert the correctly rendered message.

Quick Fix: Forwarding the email is generally the fastest and most reliable way to force Outlook to resolve image reference errors before export.
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Frequently Asked Questions

Why do inline images turn into red X boxes when converting emails to PDF?

This typically occurs because the PDF converter cannot correctly resolve the Content IDs (CIDs) or temporary reference links of inline images when an email is opened as an attachment rather than as a standard inbox item.

Does updating Outlook fix the broken image issue during PDF conversion?

Updating Microsoft Outlook and your PDF conversion software can resolve known rendering bugs, but using workarounds like forwarding the email or saving the message locally is often still required for nested attachments.

Can I use 'Print to PDF' instead of a PDF converter plugin?

Yes, using the built-in 'Microsoft Print to PDF' feature from the Outlook print menu often processes images differently than an external plugin and may successfully bypass the broken link issue.