'%3e%3cpath%20d='M8%200C12.4183%200%2016%203.58172%2016%208C16%2012.4183%2012.4183%2016%208%2016C3.58172%2016%200%2012.4183%200%208C0%203.58172%203.58172%200%208%200ZM11.6162%204.38379C11.2257%203.99337%2010.5927%203.99338%2010.2021%204.38379L8%206.58594L5.79785%204.38379C5.40732%203.99334%204.77429%203.99329%204.38379%204.38379C3.99331%204.77429%203.99335%205.40733%204.38379%205.79785L6.58594%208L4.38379%2010.2021C3.99348%2010.5927%203.99341%2011.2257%204.38379%2011.6162C4.77426%2012.0066%205.40734%2012.0065%205.79785%2011.6162L8%209.41406L10.2021%2011.6162C10.5927%2012.0066%2011.2257%2012.0067%2011.6162%2011.6162C12.0067%2011.2257%2012.0066%2010.5927%2011.6162%2010.2021L9.41406%208L11.6162%205.79785C12.0066%205.40735%2012.0066%204.77429%2011.6162%204.38379Z'%20fill='%23080E17'%20fill-opacity='0.46'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='clip0_3761_713'%3e%3crect%20width='16'%20height='16'%20fill='white'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
How to Fix Power Automate Email Attachments That Cannot Be Opened
Question details
The user needs to fix a Power Automate flow that sends email attachments which recipients are unable to open, often due to missing file associations, lacking extensions, or invalid content.
- Product
- Power Automate
- Device & OS
- not provided
- Scenario
- Sending an email with an attached file, such as a greeting card, using a Power Automate workflow.
- Observed behavior
- The recipient cannot open the email attachment. The file either has no application associated with it, lacks a file extension entirely, or displays blank/unavailable content when previewed.
Ensure you have permission to edit the Power Automate flow and that the source file you are trying to attach is accessible and not corrupted.
Include the Correct File Extension in the Attachment Name
Ensure the attachment has a recognizable file extension so the recipient's operating system knows which application to use to open it.
Log into Power Automate, locate your specific flow, and click 'Edit' to open the flow designer.
Find the 'Send an email (V2)' or equivalent action where the attachment is being configured.
In the 'Attachment Name' field, manually append the correct file extension to the file name string (for example, change 'GreetingCard' to 'GreetingCard.pdf').
Save your flow and trigger a test run. Send the email to yourself to verify that the attachment now opens correctly.
Retrieve and Map the Binary File Content Correctly
Fix issues where the attachment is blank or unreadable by passing the actual file binary content instead of a file path or URL.
Check File Permissions, Encoding, and Flow History
Troubleshoot deeper issues by verifying system permissions, data encoding, and reviewing the flow's execution logs.
Handle Your Documents with WPS Office
While troubleshooting Power Automate flows, you can rely on WPS Office to seamlessly open, edit, and save your document attachments. It is a lightweight, fully compatible suite perfect for handling all your daily document needs.
- 1. Download WPS Office: Visit the official WPS website to download the free WPS Office suite for your operating system.
- 2. Install the Application: Run the installer and follow the on-screen instructions to complete the setup process.
- 3. Set as Default Application: Configure WPS Office as your default document application to automatically open Word, Excel, and PDF email attachments.
Frequently Asked Questions
Why does my Power Automate email attachment have no file extension?
This happens if the file extension is not explicitly included in the 'Attachment Name' field within the 'Send an email' action. You must manually add extensions like .pdf, .docx, or .xlsx to the file name string for it to be recognized by the recipient's operating system.
Why is the email attachment sent by Power Automate 0 bytes or blank?
Blank or 0-byte attachments typically occur when the flow passes a file path or URL into the 'Attachment Content' field instead of the actual binary file content. Ensure you use a 'Get file content' action before sending the email and map its output to the attachment content.
Can I send multiple attachments in a single Power Automate email?
Yes. You can create an array variable containing the names and contents of multiple files, then pass this entire array into the 'Attachments' field of the 'Send an email (V2)' action using the 'Switch to input entire array' button.
