Error: 'Unable to send all emails. Error with the address xxx: Unknown..'
Description
Cause
Resolution

Check your version of Microsoft 365

TIP: To find out the version you're using, refer to this Microsoft help article

Make sure you're using a compatible version of Microsoft Office. For more information on which versions are compatible, use our compatibility checker.


Create a new signature in Outlook

For help with creating a signature, refer to this Microsoft help article.

Once you've created the signature, you can apply it to your layout in your program:

  1. In Sage 50 Accounts, on the menu bar click Settings, then click Email Defaults.
  2. Confirm your Email Program shows as Microsoft Office Outlook.
  3. Click the tab for the layout type you wish to apply a new signature to, for example, Invoice.
  4. Click the drop-down menu next to Override Default Outlook Signature and select the new signature you have created.
  5. Repeat step 4 for any other layout types, for example, Statements.
  6. Press Apply, then select the check box for the layouts you wish to apply these settings to.
  7. Click OK.

Download the SBDDesktop.exe.config file

  1. Click this button to download the SBDDesktop.exe.config file:
    SBDDesktop.exe.config download
  2. If prompted to save the file, click Save
  3. Browse to where the file saved, then right-click on the SBDDesktop.exe.config file, then click Copy.
    NOTE: Ensure you copy the file with the exact name SBDDesktop.exe.config and not duplicates such as SBDDesktop.exe(1).config.
  4. In Sage 50 Accounts, log in to your company, then click Help and click About.
  5. Under Program Details, click the Program Directory folder path.
    The file explorer window opens, showing the program directory folder.
  6. Within the file explorer window, right-click, then click Paste to paste the downloaded file into the program folder. 
  7. Close the file explorer window, then close and re-open Sage 50 Accounts.

NOTE: If you have other error messages when emailing, or you use a different version of Outlook, follow the steps in our troubleshooting email issues article.


If the issue persists, you can follow our further troubleshooting steps in our Understanding Event Log Errors guide. If these steps fail to resolve the issue, get in touch so we can help you.

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