What is [pii_email_37f47c404649338129d6] Error and How to Solve it?

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With more than 400 million reported active users, Microsoft Outlook is the third biggest email client by market share with 9.1%, behind only Gmail (27.8%) and Apple iPhone (27.6%).

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However, if you are using Outlook you might from time to time encounter some bugs. One of them is the [pii_email_37f47c404649338129d6] error.

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What is this error and how you can solve it? We’ll show you in this article so read on.

What is [pii_email_37f47c404649338129d6] Error?

So what is this non-descript error, what causes it and how can you solve it?

[pii_email_37f47c404649338129d6] error, or more specifically, “failed to connect to the server. Socket Error: 10051 Error Number: [pii_email_37f47c404649338129d6], can happen due to a conflict with the SMTP server if you set up your software wrong during installation.

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This error will prevent the user from sending messages to other accounts, but not to receive emails or view emails in their inbox.

How to Solve [pii_email_37f47c404649338129d6] Error?

Fortunately, since [pii_email_37f47c404649338129d6] is well-known, there are several options to solve it. We’ll show you six methods to do this.

Method 1: Check Your Outlook Settings

As  [pii_email_37f47c404649338129d6] results from a wrong installation setup, one of the first places you should look into for solving it are your Outlook settings.

Step 1: Launch Outlook.

Step 2: Open the Tools menu and click Accounts.

Step 3:  If you have multiple Outlook accounts, select the one that is showing this error and select Properties.

Step 4: See if it is set as per email server by checking its ID.

Step 5: Click More Settings, select the Outgoing Server tab and make sure that the Outgoing Server Authentication is on.

Step 6: In the Advanced tab make sure that SMTP & POP settings are the same as the email hosting provider.

Step 7: Save settings by clicking Ok.

Method 2: Check for Duplicate Accounts

You might have a duplicate Microsoft Outlook account that is causing this error. So you’ll need to find it and remove it.

Step 1: Launch Outlook.

Step 2: Go to Account Configuration.

Step 3: Open the Mailing tab.

Step 4: Look at the list of your emails and find duplicate accounts if you have any.

Step 5: Delete duplicate accounts by clicking on Eliminate.

Method 3: Fix Windows Repair Tool

Windows has a built-in report tool that you can conveniently use to diagnose and fix most errors and bugs with Microsoft apps and programs. Including [pii_email_37f47c404649338129d6] error in Outlook.

Step 1: Open the Control Panel.

Step 2: Select Programs and attributes.

Step 3: Find Microsoft Outlook in the list of programs.

Step 4: Click Edit and then Repair.

Step 5: Follow the Wizard in the next window to have the repair tool automatically fix the error.

Method 4: Disable Your Antivirus Program

Antivirus programs are known to cause problems from time to time. In this case, it might be preventing Outlook from connecting from client email. You might need to disable it to solve the error, but don’t forget to turn it back on.

Step 1: Open the Control Panel.

Step 2: Go to Update and & Security.

Step 3: Go to Windows Security.

Step 4: Select Virus & Threat Protection.

Step 5: Click on Manage Settings.

Step 6: Find Real-time Protection and disable it.

Method 5: Change the Server Port Number

You might be able to solve the error by manually changing the server port number, so let’s try this method as well.

Step 1: Launch Outlook.

Step 2: Go to File and Account in the Settings.

Step 3: Select the email that is causing problems.

Step 4: Click More Settings in the email window and then Internet Email Settings.

Step 5: Go to the Advanced tab and change the SMTP port number from 465 to 587.

Step 6: Save settings by clicking Ok.

Method 6: Uninstall and Reinstall the App

If none of the earlier methods work, you might get lucky if you uninstall and then reinstall Outlook.

Step 1: Open the Control Panel.

Step 2: Go to Programs and Features.

Step 3: Select Microsoft Office or Outlook from the list and click Uninstall.

Step 4: This will open a new window. Just follow the instructions to uninstall the program.

Step 5: When you’ve uninstalled the program, reinstall Microsoft Office and Outlook.

Hopefully, one of these methods solved the [pii_email_37f47c404649338129d6] error.

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