How to Stop Outlook Sending Multiple Emails – Complete Guide
“Last week my Microsoft Outlook 2013 sent multiple copies of same email. However, this does not happen with all emails. But sometimes you send an email along with attachments 20-30 times. Therefore, it causes problems for both me and the recipient to manage the mailbox perfectly. Therefore, I am looking for a solution to solve the problem of Outlook sending multiple emails with attachments easily and simply.
Multiple copies of same email become very irritating for both sender and receiver who send and receive that particular email. Systematically managing the Outlook mailbox becomes difficult because the receiver will have that same email many times in inbox and sender will have that same email many times in sent items folder. Moreover, if your Outlook sends multiple emails to mailbox, then it’s most annoying things that irritates users the most.
This improper functioning of Outlook has now become a common problem for email application users. Thus, this blog discusses several causes and solutions to resolve Outlook sending multiple emails issue that a user can use without any hassle.
Author’s Advice: Improper functioning of Microsoft Outlook can damage the data file, either a PST or OST file. Always take a backup of your current and healthy data file and keep it safe from virus attacks. PST file is a default data file of MS Outlook 2021, 2019, 2016, 2013, 2010 and earlier versions.
PST file stores all your Outlook mail profile emails, contacts, calendars, tasks, etc. As per suggestion, always take a backup of Outlook data files and keep Outlook PST file error-free. There are many Outlook errors which occur due to PST file corruption. Use Outlook PST Repair Tool to keep Outlook data files healthy.
Why is Outlook Sending Multiple Emails with Attachments?
There can be several reasons why users face this repeated emails in Outlook problem and the most common ones are discussed below:
- Anti-virus integrated with MS Outlook – One of major factors that Outlook sends multiple copies of an email is anti-virus software integrated with the MS Outlook application. The reason behind this is that the anti-virus scans every outgoing email, where this duplicate email issue occurs more frequently.
- Short Interval Between Send/Receive Connection – Another major cause of MS Outlook 2010 sending duplicate emails is a short time interval, for example, less than 6 minutes is set between send/receive connections. It is because when the email is uploaded to the server, it is possible that the next send/receive connection is built up before the first one completes. In this, sometimes a message is still present in Outbox and submitted again to send before it received by the receiver. This is most common reason why repeated emails are sent and received again and again.
- Due to Server Timeout – The IMAP and POP accounts are responsible for the slow connection to mail host. It tells Outlook when to consider that connection is lost, i.e. when no response is generated from server within default time, i.e. 1 minute. It is time when the connection is really weak and reaches a timeout.
Due to this, it resends the message when the Send/Receive connection is rebuilt. This will generate multiple copies of the message when submitted to the server, and there is no acknowledgement message received before timeout.
Approaches to Fix Outlook Sending Multiple Emails Error
There are different approaches available that a user can use to solve this. Outlook is sending multiple copies of the same email. However, the solution to fix Outlook varies depending on cause of the occurrence. Thus, here all possible solutions depending upon cause are covered.
Approach 1: Turn Off Integrated Anti-Virus
If Outlook sends multiple copies of emails with attachments, it is always suggested to turn off anti-virus if integrated with MS Outlook. Because it does not create any problems, but increases performance of Outlook. After that, user can try to send a message and check for generated duplicates. If they do not appear, then problem is only due to anti-virus.
Approach 2: Increase Time Between Send & Receive Connection
A user can increase time interval between send & receive connections to check if Outlook sending multiple emails or not. Now, follow same steps listed below:
In Outlook 2007 & below versions
- First, click on Tools and choose Send/Receive option
- After that, click on Send/Receive Settings and then on Show Progress
In Outlook 2010 & all the above versions
- To begin, click on the Send/Receive tab.
- Then, click on the Show Progress option.
If there are more than two tasks present in dialog box, it means send/receive time interval is set to very small.
Increase Time Interval by Following Steps Given Below
- First of all, besides the Send/Receive Groups, choose the downward arrow
- After that, choose the Send/Receive Groups option
- Now, change the time interval from Schedule an automatic send/receive every option
Note: It is always advisable not to set time shorter than 5 minutes. However, in case of multiple accounts, set it to more than 10 minutes.
Approach 3: Extend Server Timeout
By default, mailing host timeout is set at 1 minute for POP & IMAP profiles. Therefore, it is always suggested to increase it to 2 to 3 minutes. However, do not exceed it for more than 3 minutes. Now, follow same steps given below:
- First of all, click on File >> Account Settings option.
- After that, double-click on IMAP/POP3 account.
- Now, from dialogue box, click on More Settings option.
- Next, click on Advanced tab in Change Account box.
- Then, go to Server Timeout section and increase time.
- After changing time interval, Click on OK button.
How to Fix Outlook Sending Multiple Emails With Different Attachments
One can use FreeViewer Outlook Duplicates Remover software to automatically detect and remove multiple emails that got duplicated in mailbox, resulting in reduced mailbox size and increased MS Outlook performance with work efficiency. This trusted software can perform deduplication of emails, contacts, calendars, journals, tasks, and notes. This tool is more efficient and user-friendly. This expert recommended utility is specially designed to eliminate such unwanted items from mailbox.
It offers an option to simply remove duplicates of particular category items. This tool supports all versions of Windows and macOS. This tool provides dual mode to dedupe the emails from within and across folders. Know how this tool actually works.
Read More: How to Remove Duplicate Emails in Outlook
Steps to Resolve Outlook Send Several Messages Error
- Download & run the above-recommended software on system.
- Tap Add files and folder option to upload data files.
- Choose Dual mode, i.e., Within & Across Folder.
- Change destination path for saving the output file or folder.
- Select Emails from item type tab.
- Apply some filters related to emails from specific duplicate criteria.
- Hit Ok button to complete dedupe process.
Conclusion
To maintain continuity of work, emails always play a vital role. However, there are some situations in which Microsoft Outlook sends multiple emails with attachments, which creates trouble for a user. Therefore, in this blog, all causes that raise Outlook sending multiple emails issues are discussed with their respective solutions. One can easily refer to them and resolve duplicate email issues from MS Outlook.