Using classic Outlook for Windows in business environments
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Thank you for reaching out.
Based on my research, this issue may be related to Outlook being unable to locate or access the data file associated with your email account. This can prevent emails from being sent and cause them to remain in the Outbox.
You can refer via: Error 0x8004010F when sending or receiving email - Outlook | Microsoft Learn
To troubleshoot it, you could try to follow these steps:
Restart Outlook and your computer
This may resolve temporary access or file lock issues. After reopening Outlook, please ensure that Outlook is online:
Open Outlook. Go to the Send/Receive tab.
Make sure “Work Offline” is not enabled.
Recreate your Outlook profile
Close Outlook. Go to Control Panel > Mail > Show Profiles.
Click Add and create a new profile.
Re-add your email account.
Set the new profile as default, then try to access your account and check if the issue persists.
Reference:
Create an Outlook profile - Microsoft Support
To ensure I fully understand your situation and provide the most effective assistance, I’ll need a few additional details, such as:
Could you please confirm your account configuration in Classic Outlook (Exchange, POP, or IMAP)?
Have there been any recent changes to your account or Outlook configuration?
If possible, could you please try accessing your email via Outlook Web (OWA) and check whether you encounter the same issue when sending emails there?
Any update would be appreciated.
Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution.
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