How to Solve Outlook Error [pii_email_37f47c404649338129d6] With 6 Amazing Methods

Do you face the socket error: 10051 Error number [pii_email_37f47c404649338129d6]? It is a common error and faced by many people. Do you also face this error when you send emails from your Microsoft outlook express? Well, there are a lot of methods to fix this error. 

In this article, we will be talking about what the error is and what causes it and also about six amazing methods to fix and solve the outlook error. You will get a complete guide here. Let’s get started. 

What are [pii_email_37f47c404649338129d6] Error and the Reasons behind It? 

[pii_email_37f47c404649338129d6] error is a penetrating problem that happens when you, a Microsoft Outlook Express user tries to send an email. With this error, you can receive and read emails from other connections without any problem. But the error won’t allow you to send an email to any other connections. 

There is no fixed reason for such an error. There are a lot of factors that may raise the issue.So the most common cause or reason of this error is the connection problem with the SMTP server. The connection issue can occur due to incorrect port number, wrong software configuration or other authentication issues. 

Since the cause can’t be depicted easily, there are a few methods which we need to apply to know why the error occurs in our device and to solve it.

Symptoms of [pii_email_37f47c404649338129d6] Error

This error can appear anytime on your device like during an installation process, while Microsoft software is running, during windows shutdown and many more. Let me tell you about some of its symptoms. 

  • When the error occurs it crashes the window. 
  • Your device will crash regularly while operating the same program.
  • Your operating system will regularly crash. 
  • Windows becomes slow and takes time to respond to any input. 

6 Amazing Methods to solve [pii_email_37f47c404649338129d6] Error 

As we have already discussed, there is no specific reason behind the occurrence of the error. You will have to apply various methods to solve the error and see which one worked. So now, we will be talking about six of these amazing methods. 

1. Check Antivirus Software on the Windows 

We are starting with an easy and simple to apply method. Here, all we need to do is disable the antivirus and see if the error has been solved. Many times antivirus don’t allow the apps to make connections with other servers. To disable the antivirus you can follow the steps below. 

Step 1: Go to the Start Menu and then go to Settings. 

Step 2: Click on the Update and Security option and select Windows Security. 

Step 3: Now you need to go to Virus and threat protection and disable it. 

virus and threat protection

All antivirus don’t have the same disabling process. So you will have to check the disabling method of your antivirus. 

2. Reinstall Microsoft Outlook 

This is a simple and most practical solution for the error. Many of the times poor installation is the reason behind [pii_email_37f47c404649338129d6] error. So to reinstall outlook, you can follow the steps below. 

Step 1: Go to the Control Panel and open program and features option. 

Step 2: Now in the list search for Microsoft Office 365 and uninstall it. 

Step 3: After uninstalling, install Microsoft Office 365 again. 

Step 4: Login with a new account and check if the error has been solved or not. 

This method is very useful. But if the error is still not solved then you can try the other methods. 

3. Check Server Requirement Settings 

The server’s requirement settings can also be the reason behind [pii_email_37f47c404649338129d6] error. You must recheck the settings. Follow the steps to do so. 

Step 1: Open Microsoft outlook express on your device. 

Step 2: Open the Tools menu and click on the Accounts tab. 

Step 3: Select the account and click on the Properties option. 

Step 4: Check the ID of SMTP and match it with your email server. 

Step 5: Go to more settings and select the outgoing server tab. Here you need to see that the My outgoing server require authentication checkbox has been ticked. 

Step 6: Next, go to the Advanced tab and check whether the Outgoing Server value matches with your email hosting provider or not. 

Step 7: Now save settings and restart the device. 

After doing the above, check if the error has been fixed or not. 

4. Use the Auto Repair Tool on Windows 

You can use the repair tool available on Windows to solve [pii_email_37f47c404649338129d6] error. This tool will solve the error if it has occurred due to poor installation. Follow the steps below. 

Step 1: Open the control panel and your windows device. 

Step 2: Select the Programs and click on the Program and Features option. 

Step 3: A list of the entire installed program will appear. Find Microsoft Outlook Or Outlook Express on the list. 

Step 4: As you find it, right-click on it and choose the Repair option. 

Step 5: A pop-up wizard will appear and it will fix the issue. 

This method may take longer than other methods. After you receive a successful message, restart your device. 

5. Check if you have Duplicate Accounts 

Having duplicate accounts can also cause [pii_email_37f47c404649338129d6] error. So you must remove all the duplicate accounts and see if the error is fixed. 

Step 1: Open the Microsoft Outlook Express and go to the outlook menu. 

Step 2: Select the account setting option and click on the mailing tab. 

Step 3: Check all the accounts and remove the duplicates. 

Now reopen the Microsoft outlook express ad try sending emails to see if the issue is solved. 

6. Change the Port Number of the Server 

If you have tried all the methods discussed above and the [pii_email_37f47c404649338129d6] error isn’t solved yet then you can try by changing the port number of the server. This method is useful sometimes. Follow these steps to change the number. 

Step 1: Go to Microsoft outlook express and open file and account settings. 

Step 2: Select your email from the email section. Now open it in a new window. 

Step 3: Go to more settings and click on Internet Email settings. 

Step 4: Click the Advanced tab and change the value of the SMTP from 465 to 587. 

Step 5: Apply the changes by clicking OK. 

After doing the above, restart the device. Then open Microsoft outlook express and check if the error has been solved or not. Most probably it will be solved. 


So the above were some amazing methods to solve the [pii_email_37f47c404649338129d6] error problem. It is a common problem that many Microsoft Outlook users might face and one of these six methods will surely solve the issue. There is no one fixed method to solve the error so you will have to keep trying one method after the other to fix it. The methods aren’t that time consuming or complex. And you never know, maybe the first method you try might fix the issue for you. 


How do I see my emails on Outlook?

Sign in to Outlook with your Microsoft 365 account:

  1. Go to Microsoft 365 sign in or 
  2. Enter the credentials for your account. 
  3. Click on sign in

This will open a page where you will be able to see your mails. 

Do you have to pay for Outlook email?

We don’t need to pay for our personal public account. But if you are running a start-up and are an entrepreneur or have a business or enterprise then you need to pay an amount depending on our Microsoft 365 subscription. 

How do I open Microsoft Lync in Outlook? 

Sign in to the outlook account and then you will have to copy links of the teams and paste them on outlook or directly click on the links and select outlook.  

What are tasks in Microsoft Outlook? 

Tasks in Microsoft refer to the actions that can be performed by any user. Tasks include things like booking a conference room, booking tickets and much more. 

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