Question: My recipients have been receiving multiple same copies of email that I have sent using Ms Outlook. What should I do?

There are several possible reasons that could cause your Outlook to send duplicated copies of the same email:

Many times that duplicated email issue is caused by poor Internet connection or stuck sessions. Restart both your device and Internet modem/router to clear cache or any stuck sessions that may be causing the issue.

If restarting the Internet modem/router doesn't help, try switching to an alternate Internet connection such as your mobile broadband to see if there is problem with your usual ISP.

Make sure to remove all emails that are stuck at the Outbox as it would cause the Outlook to keep attempting to send the same batch of emails.

If you have an antivirus program running on your device, try disabling it as it may be interfering with the connection between Ms Outlook and the email server.

If your Outlook is integrated with a virus scanner add-in, you may also want to try disabling it to see if it is the cause of issue.

The send/receive interval determines how long your Outlook will send or download emails. Whenever you send an email, it may take a while for the email to be uploaded to the server. If you set the send/receive interval to a very short period, before the upload completes, the next send/receive interval has already started. This could cause the Outbox to re-upload the email, causing duplicates.

It is recommended to follow the default interval (i.e. 30 minutes) or not less than 10 minutes. You may refer to Outlook's guide on how to check and edit this setting.