How to Fix [pii_email_37f47c404649338129d6] Error on Microsoft Outlook


If you’re running a Windows PC, the chances that you’re using Microsoft Outlook are great. Although this isn’t the most used email client, which is already taken by Gmail, Microsoft Outlook is the third most used email client right after Gmail and Apple iPhone email client.

The best part about Outlook is that you can link all of your email accounts across various clients, and you can observe and manage them from one single place.





Even though this feature made Microsoft Outlook a great choice, there are some bugs that literally break this software. One of the most encountered bugs is the [pii_email_37f47c404649338129d6] error. How to get rid of this? Let’s talk about it.

What’s the [pii_email_37f47c404649338129d6] Error?

Lately, we’ve talked to a lot of people who are unable to send any mail from their Microsoft Outlook Client. When they are pressing the send button, they are getting a pop-up that says [pii_email_37f47c404649338129d6] error. Are you facing the same problem?

If so, it means that there’s a mistake in your Microsoft Outlook client settings, and this mistake is being discovered by the SMTP server, which in turn in causing a conflict between the two. There are different things that can cause this, which is why the process of fixing this is quite lengthy, even though it’s not complicated.

One of the biggest reasons might be that your Outlook client is backdated. Then again, there may be other reasons such as problems with the username or password, cache files, or cookies. Then again, if you try to send an email to someone without fixing the settings of the record properly, you may get an [pii_email_37f47c404649338129d6] error code.

How to Fix [pii_email_37f47c404649338129d6] Error Code?

As there might be different reasons as to why you are facing the [pii_email_37f47c404649338129d6] error code, fixing this can be somewhat problematic. However, that doesn’t necessarily mean that it’s tough to fix.

You need to go through some easy steps to fix an [pii_email_37f47c404649338129d6] error, but you never know which one of them is causing the problem until you find the fix.

Also Check: [pii_email_e7ab94772079efbbcb25]






1. Uninstall and Reinstall Microsoft Outlook:

There are a lot of instances where our readers had found that their version of Microsoft Outlook client was pretty old or not updated to the latest version. Usually, Microsoft Outlook is supposed to update itself when it gets a new patch. However, there are times that software and apps go wrong, and you need to take charge of them.

In this case, you need to update Microsoft Outlook manually. If you go to the app stores, you’re most likely to find that Microsoft Outlook is already updated to the latest version, and they won’t show that there’s a newer version.

In such cases, we highly recommend uninstalling the Microsoft Outlook client. When you do so, make sure that you delete all the accompanying data, such as cache files and temporary files. Then, go to their official page and download from there, or simply download from the app stores.

2. Repair from the Control Panel:

If you’re running a Windows computer, only then this solution might work for you. All you need to do is go to the control panel. If you’re running Windows 10, then you will find the control panel button on the bottom right of your desktop.

Control Panel Windows 10

Then, if you’re viewing the category mode, go to the Apps tab. At this stage, you need to find out the Microsoft Office 365 option in the given list. Once you get the desired button, click on it, and two options will appear right below it. Click on the ‘Modify’ button, and then pick online repair.

If there’s anything wrong with the technical files of your Microsoft Outlook app, this process will fix that, and you may get rid of the [pii_email_37f47c404649338129d6] error.

3. Repair Record Settings Options:

A lot of our readers found this to be useful. If you see that the previous steps aren’t working for you, then you need to take a different approach to solve this problem.

Go to the Microsoft Outlook application, and click on the File dropdown menu above. Once you get the dropdown menu, find the Record Settings option from it, and click on it. Click on the email tab from the pop-up window and choose a record from your Outlook.

You might have to select your email ID in the process, but we’ve seen that you need to do this if you’re using multiple IDs on Outlook. Once you’ve clicked on it, click on the More Options button, and then on the web email settings tab. Once you’re there, click on the Active Worker tab, and check the box beside the SMTP requires authentication text.

Click on the ok button below and confirm the changes. Once you’re done, you’re not supposed to face this problem again.

4. Change Server Port Number:

Another major reason is mismatching server port numbers. If this is the case for you, too, then you need to set the port numbers manually. Open Outlook, and click on the Document tab, and then on the Account Settings option.

Here on, you’ll find the Record-Setting option, and from here, you need to choose your email account. It’s recommended to choose the one you’re facing the problem with.

Once you’re done with this, you need to click on More Settings and choose Internet Email Settings from there. Click on the Advanced tab afterward.

If you see that the SMTP number is set to 465, maybe this is why you’re facing this problem. Changing this number to 587 will solve the problem. Once you change the number, you need to click the Ok button to confirm the change.


The [pii_email_37f47c404649338129d6] error is surely a software breaking flaw of Microsoft Outlook.

Recent patches have polished this to some extent, but there are still some versions that might face this problem. If you follow the mentioned steps, you’ll be able to solve this problem.

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