How to fix [pii_email_37f47c404649338129d6] error code in mail?


The [pii_email_37f47c404649338129d6] error in the mail is posing a lot of problems in the smooth user experience of using Microsoft Outlook. Microsoft Outlook is famous and known for the robust user experience it provides to the users. 

Millions of users around the world use Outlook for sending or receiving emails especially while using multiple accounts. It has been quite some time now that Outlook users have reported an error named [pii_email_37f47c404649338129d6] error. The error pops up when a user tries to send an email or manages multiple accounts in Microsoft Outlook. 

In this article, we are going to discuss what is [pii_email_37f47c404649338129d6] error and how to fix it in mail? Let’s find out.

What is the Outlook [pii_email_37f47c404649338129d6] error code?

There might be several reasons for [pii_email_37f47c404649338129d6] error to occur in Microsoft Outlook but one of the major reasons is the conflict between the software/app with the SMTP server. 

The SMTP or Simple Mail Transfer Protocol is defined as a communication agreement for electronic mail transmission. As a result, a conflict or issue in the communication agreement leads to [pii_email_37f47c404649338129d6] in the outlook mail.

How to fix [pii_email_37f47c404649338129d6] error in Microsoft Outlook?

A lot of internet users around the world use Microsoft Outlook as their primary software for mailing. Hence, this error code creates a lot of issues and delay in the working of people.

Therefore, in this article, we have shared some of the top 10 methods to fix [pii_email_37f47c404649338129d6] error in the mail.

METHOD 1: Fix the error via Programs & Features Tab

You can attempt to fix the error in programs and features tab using the auto-fix error option. Follow the steps given below to auto-fix the error:

  1. Visit the control board and look for the project section. 
  2. Highlight all the running programs
  3. Go to Microsoft Office 365 and select the Office application that you want to fix. 
  4. Click on the “fix” button present at the Programs & Features tab. 
  5. Follow the steps that appear on the dialogue box after clicking the “fix” button. 
  6. Restart Microsoft Outlook after the process is completed.

METHOD 2: Update Microsoft Outlook

Check the current version of Microsoft Outlook installed in your system. An outdated version of Outlook might be the reason behind [pii_email_37f47c404649338129d6] error during sending of mails.

You must update the Outlook app to the latest version to use it smoothly without any error.

METHOD 3: Fix the worker prerequisite settings

Check if the prerequisite settings are set up properly. Follow the steps given below if they aren’t set up properly. 

  1. Click file
  2. Select record settings option
  3. Go on email tab
  4. Choose a previous record
  5. Select one of your email accounts from the dropdown
  6. Head on to the right hand corner after selecting the email and visit more settings option
  7. Visit the active worker tab
  8. Tick My outgoing server (SMTP) requires authentication
  9. Click OK to save the settings. 

Restart the Outlook app now after saving the changes.

METHOD 4: Remove Duplicate Accounts

Check the email tab and see whether duplicate accounts are present or not. You must remove duplicate accounts from the email list. Follow the steps given below to remove duplicate accounts(if any).

  1. Click Menu
  2. Open the record settings
  3. Visit the email tab
  4. Check any duplicate emails in the list
  5. Select an email account that appears twice and remove it from the app. 
  6. Restart the Outlook app to solve the [pii_email_37f47c404649338129d6] error.

METHOD 5: Make changes to server port number

Sometimes, the error occurs because of a glitch in the server port number because of multiple reasons. You must change the server port number so as to solve the error and enable the smooth functioning of Microsoft Outlook. Follow the steps given below: 

  1. Click Menu
  2. Open the record settings
  3. Visit the email tab and select the email address you want to change the server port number for. 
  4. After selecting the email, an additional email window will pop up, click “more settings” on that window. 
  5. Head over to internet email settings and then click the advanced tab. 
  6. Now change the Outgoing server’s (STMP) value to 587 instead of 465. 

Restart the app now to check if the error is solved.

METHOD 6: Take help from windows trouble shooting center

Visit windows troubleshoot center and search a solution for [pii_email_37f47c404649338129d6] error. This method might now work each and every time but you can try your luck if nothing works for you.

METHOD 7: Window Upgrade

You must update the windows to the latest version along with the software. Sometimes updating windows can also be a solution to the [pii_email_37f47c404649338129d6] error.

METHOD 8: Uninstall and install Microsoft Outlook again

If you have tried all the above methods to solve the error but nothing has worked for you then you might want to delete Microsoft Outlook app and reinstall it again.

This will delete all the bugs and glitches that might be taking place at the backend of the app.

METHOD 9: Change the setting of your antivirus

You might want to check the settings of your antivirus. Open the settings of your antivirus and see if it is creating any hindrance in the working of the Outlook app.

If this is the case then you must disable the setting for Outlook to work on its own without any command from the antivirus.

METHOD 10: Contact the Microsoft support team

After trying all the methods that are mentioned above, Microsoft support team is the last ray of hope.

Contact the support and share the error details so as to allow them to fix the [pii_email_37f47c404649338129d6] error code.


In this article, we shared the top 10 ways to fix [pii_email_37f47c404649338129d6] error in your Microsoft Outlook app. You can also use Microsoft Outlook in the browser if you want to access your mail in a hurry. But we are sure that one of the above methods will definitely work for you and solve the error code. 

Comment down below the method that worked the best for you so that others can also benefit from your experience. 


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