How to Fix Recipient Cannot Open a PDF Shared by Email
Question details
The user's recipient is unable to open a PDF file that was shared via email, requiring troubleshooting for either attachment or link-sharing issues.

- Product
- Device & OS
- not provided
- Scenario
- Sharing a PDF document via email to another person.
- Observed behavior
- The recipient receives the email but cannot open or view the attached PDF or the shared link.
Check your Sent folder to confirm whether you attached the actual PDF file directly to the email or inserted a cloud sharing link.
Check the PDF Attachment and Reader Software
Ensure the file is properly attached and the recipient has a compatible PDF reader installed.
If the recipient cannot open an attached PDF, the most common reason is that their device lacks a dedicated application to view PDF formats. Alternatively, the file may not have been fully attached before sending.
Open your Sent items and verify the PDF file (.pdf) is attached, not just a shortcut or a link to a local computer directory.
Ensure the PDF size does not exceed the email provider's attachment limit (usually 25MB), which might cause corruption during transmission or blocked delivery.
Advise the recipient to install a reliable PDF viewer like WPS Office or Adobe Acrobat to open the document properly.

Adjust Permissions for Shared PDF Links
If you sent a cloud storage link instead of an attachment, the recipient might lack the necessary access permissions.
Share and Open PDFs Effortlessly with WPS Office
WPS Office provides a built-in, lightweight PDF reader and seamless email integration, making it easy to share files as attachments or secure links without compatibility issues.
- 1. Open the PDF: Launch WPS Office and open your PDF document.
- 2. Share via Email: Click the 'Share' button in the top right corner and select 'Email' to automatically attach the file to a new message in your default email client.
- 3. Share via Cloud Link: Alternatively, click 'Share', choose 'Create Link', and adjust the permission settings to let anyone view the file before emailing the link.

Frequently Asked Questions
Why does the PDF attachment show up as a 'winmail.dat' file to the recipient?
This happens when the email is sent from Microsoft Outlook using the RTF (Rich Text Format). To fix this, change your Outlook email format to HTML or Plain Text before attaching the PDF.
Can a recipient open a PDF on a mobile phone without installing an app?
Most modern smartphones (iOS and Android) have built-in document viewers that can open basic PDFs natively from the email app. However, complex PDFs might require a dedicated app like WPS Office to display correctly.
How do I password-protect a PDF before emailing it?
In your PDF editor, go to the 'Protect' tab, select 'Encrypt', set a document open password, save the file, and then attach it to your email. Remember to send the password to the recipient securely via a different communication channel.
What if the PDF is too large to attach to an email?
If the file exceeds the 25MB limit of most email providers, you can use a PDF compressor to reduce its size, or upload it to a cloud storage service and share the access link instead.




