Is your Thunderbird sending duplicate emails and do you want to stop it? You are on right blog, as we will discuss how users can easily fix Thunderbird sends email twice problem using multiple manual methods and professional software to remove already existing emails that are appearing twice. So, let’s begin with article.
However, you are not only one who is facing this error where recipient gets same email twice in same folder. This issue can be very tedious and frustrating, as it can lead to Thunderbird inbox full, which further creates confusion and unnecessary communication problems. But it can be resolved effectively. This blog will cover what to do when Thunderbird sending email twice and how to stop it to get clean inbox in future. Let’s get started.
Why is Thunderbird Sending Duplicate Emails?
Before diving into any solutions, it is very important to understand some common reasons why Thunderbird sending emails twice. Let’s quickly explore them.
- SMTP Server Timeout Error: When Thunderbird sends an email, it waits for SMTP response. However, if it gets delayed, then it assumes that email is not sent and it tries again to send email.
- Antivirus Email Scanning Problem: These antivirus programs restrict outgoing emails before sending. Sometimes, this scanning process leads to Thunderbird server sending an email again, which leads to duplication.
- Unstable Network Connection: Use of poor internet connectivity might interrupt communication between client and mailing server. This makes Thunderbird send emails twice.
- Incorrect Account Settings: If user has applied or configured wrong account settings, then it can create syncing error and lead to duplication.
- Thunderbird Add Ons: Using of third party extensions or add ons with thunderbird, it results in problems in sending process, which causes multiple message sent at once.
- Syncing Sent Folder Issue: If your Thunderbird does not synchronize sent folder with mailing server properly, then duplicate messages may appear even when email is sent only once.
- Unwanted Human Actions: Sometimes, users themselves click send button multiple times unintentionally or due to slow performance of Thunderbird. This leads to Thunderbird sending two emails or even more than that.
What To Do When Thunderbird Sends Email Twice?
In this next section, we are going to explain all possible techniques that can help users resolve Thunderbird sending duplicate emails manually. User can choose solution according to their problem and challenge. Here are some of them listed below with their explanation:
1: Check SMTP Server Settings
Wrong server settings are major cause of Thunderbird sending emails twice. However, it should be fixed by following these steps listed here:
Steps:
- Open Thunderbird and go to Tools.
- Select Account Settings option.
- Choose server settings (SMTP) and click continue.
- You should make sure that server settings such as Server Name, Port Number, Connection security, Server Type, etc.
- Save all changes and start Thunderbird again.
2: Turn Off Antivirus Scanning
If you have enabled or configured any antivirus application, then you should test sending emails by disabling it. As it is disabled temporarily, it will help to remove restriction for receiving emails.
Check if Thunderbird duplicate sent error gets stopped, then you might consider that any third party or other antivirus program should now be applied to Thunderbird as it limits email scanning feature.
Note: Before doing same, check if your system is attacked by virus, then you should get it fixed. After it, you can disable antivirus program.
3: Increase Server Timeout Settings
If your mailing server is responding very slowly or getting delayed, then enhancing its timeout server value can help you. Look at how to do.
Steps:
- Open Thunderbird Account Settings.
- Choose General and search for Timeout Settings.
- You can increase server delay value.
- Exit Thunderbird and restart it.
4: Repair Sent Folder
Damaged Thunderbird folder also leads to some syncing errors, which cause duplication. Follow steps to recover folder.
Steps:
- Right click on folder that got damaged or affected.
- Choose properties and tap on Repair Folder option.
- Now, wait for some time until process gets completed.
5: Run Thunderbird in Troubleshoot Mode
Using this technique helps user as it turns off all add ins and other applied settings in Thunderbird profile.
Steps:
- Launch Thunderbird client and tap on Help.
- Choose Troubleshoot Mode on same.
- Now, quit Thunderbird and start it again to try email sending.
6: Update Thunderbird Version
If you are working on an earlier or outdated edition of Thunderbird, then it is recommended to install latest version. As it will help to fix bugs and avoid other glitches and errors, like Thunderbird sending two emails in newer versions.
Preventive Tip: Always use up to date available version to avoid Thunderbird sending duplicate emails.
Challenges Faced with Manual Approaches
These manual methods sometimes help to fix normal errors in Thunderbird, but they are not always reliable and 100% accurate solution when Thunderbird sends email twice. Here are more limitations of fixing duplication manually.
- High Chances of Data Loss
- Zero Safety and Security
- Time Taking Process
- Need for Technical Knowledge
- Not Permanent Solution
To prevent these challenges, we recommend using an expert certified solution, which is explained in following section.
How to Fix Thunderbird Duplicate Sent Emails Professionally
To resolve Thunderbird sending duplicate emails error, we recommend using SysTools MBOX Duplicate Remover, which is an automated software that scans and deletes already existing duplicates within and across Thunderbird profile. It is one of most secure and reliable programs that can eliminate emails, including attachments in few clicks without any data loss.
This best desktop based offline utility that can run on its own without requiring any network connectivity. Additionally, it offers free trial version for all to use and understand its more advanced features. Let’s see how it works.
Working of This Dedicated Software
Follow these easy and quick steps to remove duplicate emails in Thunderbird:
- Download and launch aforementioned tool on your system.
- Click Add Files and Folder to import duplicate MBOX files.
- After that, browse Destination Path to save resultant data file. Then, tap Next button.
- Select Within and Across File for removing already received messages.
- Choose Several Properties to find and eliminate specific duplicate emails.
- Now, select Action Mode, such as delete permanently, accordingly.
- At last, press Remove Duplicates to fix Thunderbird sending duplicate emails.
FAQs on Thunderbird Sending Email Twice
Q.1 Why Does Thunderbird Send Emails Twice?
A. It may send messages twice due to some account (SMTP) timeout error, poor internet connection, antivirus program, syncing issues, etc.
Q.2 How Do I Stop Duplicate Emails in Thunderbird?
A. One can review these:
- Check mailing server settings
- Turn off antivirus software
- Repair sent folder
- Update to its latest version
- Remove duplicate Thunderbird add ons
- Use an automated software developed by SysTools for cleaning up redundant messages.
Conclusion
In this article, we have discovered why Thunderbird sending duplicate emails and how to stop already existing duplicates in mailbox. It can be due to SMTP server delay problem, an unstable network connection, use of third party antivirus application, and multiple configurations of same account. However, it can be fixed using multiple approaches that include both manual and automated. If you still feel any doubt, contact to our support team via live chat.
