In most of the case scenarios, it could be happened that the message still saved in Outbox and will get resubmitted for sending emails to same receiver and thus create a duplicate email. Then your message take time to upload on mail server, and then next send/receive interval already started before when the previous one completes. Whenever, your Outlook is set to very short span of time to send/receive mails i.e. This will help you to stop sending multiple emails with attachments. Thereafter, try to send emails from your Outlook, if your Outlook stops sending duplicate emails, then you need to uninstall your antivirus from your system. To overcome from this issue, it is suggested to disable your antivirus for few minutes. From the long years, antivirus claims the issue while sending emails from Outlook. Whenever, antivirus or virus scanner is installed in your system which integrated with your Outlook, then it also scans your outgoing emails as well while sending to any sender. Recommended Solution to Stop Outlook is Sending Multiple Copies of an Email Uninstall or Disable Antivirus If all seems to be okay, then try again to send emails from Outlook.

Also try to perform simple hacks such as resetting modem, hub, Wi-Fi, router, etc.

If you have slow internet connection, then you need to extend mail server time out.

Send/Receive Interval is set to very short span of time.

It may be probably happened that your Outlook integrates with virus scanner.

Reasons Why Outlook is Sending Duplicate Emails Automatically?

Go through the entire blog to get your solution and fix it without any hassle.

In this blog, you will get to know reasons and its solution to fix the issue to stop Outlook keeps sending emails error. If you are also facing any issue where Outlook is sending duplicate emails with attachments, then here you got an assured solution to fix all the issues and stop Outlook to sending multiple emails or duplicate emails from their system. Most of users get an issue where their Outlook is sending multiple copies of an email. When users face a behavioural change in Outlook, then users are looking for its solution. As users are increasing the demand of Outlook for their system, they get also stuck in various inappropriate situations. home users, small organisations, or enterprise users. In today’s era, Microsoft Outlook becomes a most preferred email application by each type of users i.e.

Outlook send and receive settings