If you are unable to send emails using Outlook Classic and they remain in the Outbox for an extended period, there are a few potential causes and solutions you can try:
- Check Send/Receive Settings: Ensure that the Send immediately when connected option is enabled in Outlook. If this setting is not enabled, emails will remain in the Outbox until you manually initiate a Send/Receive operation. You can find this option in the Outlook settings under the Send/Receive tab.
- Deferred Delivery Rule: Check if you have any Deferred Delivery rules configured that may be delaying the sending of your emails. You can do this by going to Rules on the Ribbon and selecting Manage Rules & Alerts. Look for any rules that specify a delay in sending emails and modify or remove them as needed.
- Metered Connection Warning: If you are on a metered connection, Outlook may restrict sending emails. Make sure you are connected to a network that is not metered or adjust your connection settings accordingly.
- Background Processes: Sometimes, Outlook may not function properly if there are background processes that are stuck. You can check the Task Manager to see if there are any Outlook processes running that need to be ended.
- Updates and Fixes: Ensure that your Outlook is updated to the latest version. Sometimes, specific updates can resolve issues with sending emails. You may want to check for any out-of-band updates that address Outlook issues.
By following these steps, you should be able to resolve the issue of emails sitting in the Outbox for an extended period.
References: