What Are Microsoft Outlook PII Errors? Causes, Fixes & Complete Internal Error Guide

Microsoft Outlook PII errors are among the most common internal errors users face while sending or receiving emails. These errors usually appear in the format:

[pii_email_38c461df286a4e271053]

[pii_email_38c461df286a4e271053]

If you’re seeing a similar error code, don’t worry — this guide explains what it means, why it happens, and how to fix it quickly.

What is a Microsoft Outlook PII error?

A Microsoft Outlook PII error is an internal system error that occurs due to incorrect SMTP settings, port conflicts, corrupted Outlook installation, multiple account conflicts, or outdated software versions.

What Exactly Is PII (Personally Identifiable Information)?

PII (Personally Identifiable Information) refers to any data that can identify an individual directly or indirectly.

Common Examples of PII:

• Email addresses
• Phone numbers
• Social Security Numbers
• Postal addresses
• Login IDs

Advanced Digital PII Includes:

• IP addresses
• Biometric data
• Geolocation data
• Device information
• Social media activity
• Behavioral tracking data

In Microsoft Outlook, PII errors are not about data leaks — they are system-generated error identifiers used to track internal configuration problems.

What Are Microsoft Outlook PII Errors?

Microsoft Outlook PII errors are technical error codes generated when Outlook fails to communicate properly with the mail server.

You may see messages like:

“Failed to connect to server. Socket Error 10051”
Error Code: [pii_email_xxxxxxxxxxxxx]

These errors usually occur during:

• Sending emails
• Receiving emails
• Adding new accounts
• Updating Outlook
• Changing server settings

Why Do Outlook PII Errors Occur? (Main Causes)

Here are the most common reasons:

SMTP Server Conflict

If multiple accounts use incorrect outgoing server settings, Outlook cannot authenticate properly.

Incorrect Port Numbers

Using port 465 instead of 587 (or vice versa) can trigger authentication errors.

Multiple Accounts Logged In

Running several Outlook accounts simultaneously may cause internal server conflicts.

Corrupted Installation Files

Damaged Outlook program files lead to configuration errors.

Outdated Outlook Version

Older versions are incompatible with updated Microsoft servers.

Antivirus or Firewall Blocking

Security software may block SMTP connections.

How to Fix Microsoft Outlook PII Errors (Step-by-Step)

Follow these proven solutions:

Method 1: Remove Multiple Accounts

1. Open Microsoft Outlook
2. Go to File > Account Settings > Manage Profiles
3. Remove unused accounts
4. Restart Outlook
5. Log in again with a single account

This fixes most SMTP conflict errors.

Method 2: Change SMTP Port Settings

1. Open Outlook
2. Go to File > Account Settings
3. Click your email account
4. Select More Settings
5. Go to Advanced Tab
6. Change SMTP port:
   • From 465 → 587
7. Enable:
   • “My outgoing server (SMTP) requires authentication”
8. Click OK and restart Outlook

Port 587 is the recommended secure SMTP port.

Method 3: Clear Cache & Cookies (For Outlook Web)

If using Outlook Web:

1. Clear browser cache & cookies
2. Restart browser
3. Log in again

Method 4: Update Microsoft Outlook

1. Go to File > Office Account
2. Click Update Options > Update Now

Keeps compatibility with Microsoft servers.

Method 5: Reinstall Outlook (Advanced Fix)

If errors continue:

1. Uninstall Outlook from Control Panel
2. Restart computer
3. Download latest version from official Microsoft site
4. Reinstall and configure account again

Fixes corrupted installation issues.

Complete List of Microsoft Outlook PII Error Codes

Below is a comprehensive list of commonly reported Outlook PII internal errors:

[pii_email_ad8a68df48c9ccc6f763]

[pii_email_0c38c9ed96c780685074]

[pii_email_0c36679593d2198c]

[pii_email_0c22eff7be8ab836]

[pii_email_0bd74e68c68f82c9c1a1]

[pii_email_0b81b6a44f711a90bd63]

[pii_email_0b69f96f5424a0637e7f]

[pii_email_0b63c586ba3716ed]

[pii_email_0b015b814dc9a0906cde]

[pii_email_0ad520a0be6582097e0d]

[pii_email_0a998c26e4a731d7f557]

[pii_email_0a8ea502ddb6bd81e71b]

[pii_email_0a8c90abbff13e5619a7]

[pii_email_0a6dd78c913d3311f010]

[pii_email_0a5c1e4afd44de3a3179]

[pii_email_0a5b0e04b6004ebd9b82]

[pii_email_0a3cf8206c29129d54d4]

[pii_email_09fefdd8c1cb3bccfeb6]

[pii_email_09c625b0f54cbc2e5746]

[pii_email_09b8401bab3a9916236a]

[pii_email_09b26e2744e0cea6e5ad]

[pii_email_09954a6322d2d485402c]

[pii_email_09561ce25d5bd38c7da2]

[pii_email_094e1c56dee62f1fd809]

[pii_email_093e2516ba38e884df17]

[pii_email_0925839c0e5ab68ce37e]

[pii_email_0908d4b5ef43d5f82a55]

[pii_email_09000899dbcd39537ef8]

[pii_email_08f989e5bf25639b73bb]

[pii_email_082d4193502ba26385c9]

[pii_email_081a2214d44147a79040]

[pii_email_07db16c4ef24502f1772]

[pii_email_07cac007de772af00d51]

[pii_email_07c86ef6c94918608230]

[pii_email_07a63723810b70686330]

[pii_email_079b82dd36bfc2e608a5]

[pii_email_078c402152c738202227]

[pii_email_077b56914bdda962cebc]

[pii_email_075a705589191aa0d181]

[pii_email_073d4b111397d547e2ab]

[pii_email_0732a6c55da3918b17f5]

[pii_email_06f535d2f46dc9e0e2c4]

[pii_email_06eded8f100f865c1776]

[pii_email_0699f734bc9088de98f2]

[pii_email_066f1e5f1e4576b47760]

[pii_email_065a57e82feb11879b55]

[pii_email_064efcb120fe6f0d7dfa]

[pii_email_064efcb120fe6f0d7dfa]

[pii_email_0630d28e96b20d9eef3e]

[pii_email_06216158fd77dae07399]

[pii_email_060e6612202b31939e01]

[pii_email_05fa75ffc7b18868866a]

[pii_email_05f0625a9a0793f3]

[pii_email_05d95f9563d412a5e139]

[pii_email_05cd53e2945d61b0ba03]

[pii_email_05b2b6fb5f501e66]

[pii_email_0571c4a678d0ff6381b8]

[pii_email_055db213e80e164477b4]

[pii_email_0557fb702abdd60f19c8]

[pii_email_0500bea7a0f2381fe401]

[pii_email_04b8a82e489233ceac97]

[pii_email_0493fb2840230ad19519]

[pii_email_047fb3f762d7d2ebc9f4]

[pii_email_0471b6b3965e46b38f2c]

[pii_email_03fadcb90262189c9d23]

[pii_email_03e7dbbd94c2df2f48b1]

[pii_email_03e5b347263210840ae8]

[pii_email_03e55cc9614a67bd9222]

[pii_email_03dac92bee03b36a435f]

[pii_email_03cf392dda1a577e3139]

[pii_email_03bb558de58fa7291c28]

[pii_email_0384756a0415c35e1493]

[pii_email_0384756a0415c35e1493]

[pii_email_037d07812f905a3927ae]

[pii_email_036509233abccb394a1e]

[pii_email_033816febf3a1201542f]

[pii_email_030209161d411575be49]

[pii_email_02d0cd3fc42a63e64984]

[pii_email_029cd31e8887641ffcb2]

[pii_email_029231e8462fca76041e]

[pii_email_027b86e7828c98f84685]

[pii_email_027301e7af80ce24cbce]

[pii_email_0265bb33eaeb18eeb6b8]

[pii_email_02611e2644df19342af2]

[pii_email_024084e62ef7c98e3c28]

[pii_email_021ad854812db5484be8]

[pii_email_021023013aeac72e657b]

[pii_email_0206d6f0778e8cd65f22]

[pii_email_01c76962cd92b0dbf0fa]

[pii_email_01b43dabf23cb0371a27]

[pii_email_019b690b20082ef76df5]

[pii_email_0186a242b8f048119e49]

[pii_email_01748f73813796642591]

[pii_email_015277926c5cd5f21677]

[pii_email_00f2e2be8446cca7ae2a]

[pii_email_00ebb1b4acb9b42249fd]

[pii_email_00ba47ac8b2817e36aa3]

[pii_email_009f53665137e7af0673]

[pii_email_006b0d8bb50e2eb4daaf]

[pii_email_0048997cdc300383cb33]

Are Outlook PII Errors Dangerous?

No. Outlook PII errors are not viruses or hacking attempts. They are internal configuration errors caused by:

• Misconfigured email settings
• Software conflicts
• Authentication failures

They do not mean your personal data has been leaked.

Pro Tip to Prevent Future PII Errors

• Always keep Outlook updated
• Use official Microsoft version only
• Avoid cracked or pirated versions
• Use correct SMTP authentication
• Keep firewall configured properly

Final Thoughts

Microsoft Outlook PII errors are internal configuration issues — not security threats. Most errors can be fixed by adjusting SMTP settings, removing extra accounts, or updating Outlook.

If you’re facing a specific error code, scroll above to find your error and apply the suggested fixes.

Frequently Asked Questions