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How to Fix [pii_email_37f47c404649338129d6] Error? (January 2021)

Microsoft Outlook is one of the top email clients. If there is any other business email client after G-Suite then it is Microsoft Outlook. Millions of users are using this email client for their personal and professional work. The primary purpose of using Outlook is to send and receive emails.

However, some errors usually occur while sending emails. To be precise, sometimes we receive [pii_email_37f47c404649338129d6] error code as a popup message on the screen while sending an essential email. These kinds of errors are irritating, and it occurs mainly in the Outlook Email Client. 

However, if you come across this article looking for a solution to this error [pii_email_37f47c404649338129d6], then you are in the right place. In this article, we have added six different and simple methods to solve this error. 

Let’s have a look.

Why does the error code [pii_email_37f47c404649338129d6] occur?

The error code [pii_email_37f47c404649338129d6] usually occurs due to misconfiguration in the SMTP server or conflicts with the software programs.

There are multiple reasons. However, one should verify all the parameters and ports with configuration details.

Fix [pii_email_37f47c404649338129d6] Error

To be honest, I am not sure about the cause of these errors. It is because as I had mentioned, there could be multiple reasons why this error has occurred? No worries. We have added six solutions to this problem below. 

You may also like to read, How To Fix [pii_email_191e8e729dfc2454e1eb] Error Code

How to Fix [pii_email_37f47c404649338129d6] Error?

Since I do not know about the primary reason behind the error code [pii_email_37f47c404649338129d6] therefore, I will be adding all the practical and working methods. Let’s have a look at the solutions.

By Removing All Duplicate Accounts – 1

Sometimes, we do create multiple email accounts on the same client-server. So, if there are any other accounts that you have added to Microsoft Outlook then that could be the reason for the error code [pii_email_37f47c404649338129d6].

Since I only prefer adding only one email account to the server as it causes less load on it.

If this is the reason then I will prefer you to remove all the other email accounts that you have added to the client. You should keep only one account as a default email account as the other accounts are considered a duplicate account by the system.

You can remove duplicate accounts by following the steps given below.

  • First, you will have to open the Microsoft Outlook application.
  • After that, you need to go through the accounts settings via the menu.
  • There you will find the list of all duplicate accounts that have been added to the server.

Fix [pii_email_37f47c404649338129d6] Error

  • You now have to remove all the other email accounts excluding the primary one.
  • That’s it. You now have to restart the service and see if the error persists.

Always use updated Outlook Version – 2

The older the outlook version, the higher are the chances of getting errors. Sometimes, we do not update our application versions until the application gets stopped working or we started receiving errors.

In this case, if you are getting the error code [pii_email_37f47c404649338129d6], then it could be due to the older version of Outlook.

Therefore, you must update the Outlook application to the latest version.

Once it gets updated, try checking upon the error code if it gets persists.

Updating Outlook Settings – 3

The error code [pii_email_37f47c404649338129d6] persists only during the time of sending an email. Therefore, we must try to update some basic outlook email settings to address this issue. 

To be an instance, having improper outlook settings could be the primary reason behind this error. Therefore, I am adding the steps for updating the client settings. Let’s have a look.

  • First, you will have to open the Microsoft Outlook application.
  • After that, you need to select the email account that you want to configure from the list.
  • Choose the particular email account and go under the “more settings” option.

Fix [pii_email_37f47c404649338129d6] Error

  • There you will find the option of mail or internet settings. Just click on it.
  • After that, click on my outgoing server (SMTP) here you will be required to authenticate the server. Just authenticate and press the ok button.

Fix [pii_email_37f47c404649338129d6] Error

  • Once the authentication gets successful and done by the server, the error will get automatically resolved.

Fix [pii_email_37f47c404649338129d6] Error

  • Last, try restarting the application and check if the error persists.

Change Server Port Number – 4

Due to misconfiguration in the port number the error code [pii_email_37f47c404649338129d6] persists. No worries, you can follow the steps that we had given below to correct the port number.

  • First, you will have to open the Microsoft Outlook application.
  • After that, click on the file and account settings option.
  • Choose the email in which the error persists.
  • Go under the “more settings” option.
  • There you will find the option of mail or internet settings. Just click on it.
  • After that, click on my outgoing server (SMTP) Port.
  • If the SMTP Port sets to 465 then change it to 587.

Fix [pii_email_37f47c404649338129d6] Error

  • Last, save the settings and close by clicking the ok button.

Disable Antivirus Program – 5

Sometimes, the default antivirus program in the system can cause such an error. Therefore, if there is an antivirus program that is installed on your system, then prefer disabling it.

Windows Repair Tool – 6

Last and the most working solution to this problem. You can try fixing out the errors using the Windows Repair Tool. You can make a complete application repair by following the below-given steps.

  • First, you need to open the control panel.
  • After that, you need to choose all programs from the list.
  • Select Microsoft Outlook and click on the edit button.
  • After that, you will find the option to repair the application.
  • Click on the Repair button, and within a few minutes the application will get repaired and all of the errors will get resolved.


Here we come at the end. In this article, we have added six different solutions to the error code [pii_email_37f47c404649338129d6]. This error is kind of irritating. However, we have added the most possible solutions that you can try, and if still the error persists on your screen then comment it down below.