Fix: Excel file not attaching to email

Matthew Adams
by Matthew Adams
Windows & Software Expert
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how to fix Excel file not attaching to email

MS Excel includes a handy Send as Attachment option that enables users to attach Excel spreadsheet files to Outlook emails. Thus, users can attach spreadsheet files to emails and send them directly from Excel. It’s an option that neatly integrates Outlook with Excel.

However, some users have posted on software support forums about a General mail failure Excel error. That error message can pop up when users try to attach spreadsheets to Outlook emails from within Excel.

Consequently, they can’t attach Excel files to emails with the application’s Send as Attachment feature. Below are some potential resolutions for fixing the General mail failure issue.

What can I do if my Excel file is not attaching to an email?

1. Check that Outlook is the default email client

  1. Outlook needs to be your default email software to send Excel spreadsheets as attachments. To check, press the Windows key + S keyboard shortcut.
  2. Enter ‘default apps’ in the search box.
  3. Click Default apps to open the window in the shot directly below.The Default apps tab excel file not attaching to email
  4. To change the default email software, click the email software.
  5. Then select Outlook on the Choose an application window.Choose an application window excel file not attaching to email

2. Delete the MSMAPI32.DLL file

  1. This is a relatively old resolution that fixed the General mail failure issue for users after the 1709 Windows 10 Creators Update. First, make sure that Outlook and Excel aren’t running.
  2. Open File Explorer (press the Windows key + E hotkey).
  3. Open this path in File Explorer: C:Program Files (x86)Common FilessystemMSMAPI1043MSMAPI32.DLL.
  4. Select the MSMAPI32.DLL file.
  5. Press the Delete button.Delete option excel file not attaching to email

3. Disable third-party antivirus and firewall software

Some users have confirmed they’ve fixed the General mail failure error by removing third-party firewall blocks for MS Excel. So, try turning off (or uninstalling) any third-party antivirus and firewall software to see if they’re blocking Excel’s email attachment feature.

A lot of antivirus utilities include a disable (turn off) option of some kind you can select by right-clicking their system tray icons. If you can’t find such an option, however, uninstall the third-party antivirus or firewall software.

Avast antivirus disable options excel file not attaching to email

You want to check if your firewall is blocking some features? Follow the simple steps from this guide to find out.

4. Repair the MS Office suite

  1. A few users have said that MS Office’s Repair option fixed the General mail failure issue for them.
  2. Press the Windows key + R keyboard shortcut.
  3. Input ‘appwiz.cpl’ in the Run box and click OK to open the uninstaller window shown directly below.Windows uninstaller excel file not attaching to email
  4. Select the MS Office suite listed there.
  5. Click the Modify (or Change) option.
  6. If it’s an MSI-based MS Office, select the Repair option. Press the Continue button.
  7. Users with click-to-run Office suites will need to select Online Repair > Repair. Alternatively, you can select a less thorough Quick Repair option.The Online Repair option excel file not attaching to email

5. Uninstall Duplicate Office apps

The General mail failure error often arises due to duplicate versions of MS Office apps being installed. Some users might have older versions of MS Office applications installed alongside newer ones. Thus, removing duplicate MS Office might resolve the issue.

To do that, open the Windows 10 Start menu and click the Microsoft Office folder there to see if there are any duplicate Office applications there. Right-click duplicate Office software there and click Uninstall to remove app entries that don’t relate to your current Office version.

 Start menu's Uninstall option excel file not attaching to email

6. Reinstall MS Office

  1. Reinstalling MS Office is another resolution that has fixed the General mail failure error for some users. Before uninstalling the suite, make sure you have the activation code (product key) to reinstall it with.
  2. Click the Download button on the Uninstall Office from a PC page to get the installer for the Office uninstall support tool. Then open that setup wizard to install the uninstall utility.
  3. Open the Office uninstall support tool, and uninstall the suite with that utility.
  4. Restart Windows after uninstalling MS Office.
  5. If you don’t have any installation file for MS Office, you’ll need to click the download link for the suite on your Microsoft account page.Microsoft account page excel file not attaching to email
  6. Then enter your MS Office product key.
  7. Click the Install Office option.

Those are some of the confirmed fixes for Excel’s General mail failure error. With that error fixed, you can then attach Excel files to emails with the application’s Send as Attachment option.

If you have any other questions or suggestions, don’t hesitate to leave them in the comments section below.


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