---
title: "How to resolve error: The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.7.0 authentication required."
description: "How to resolve error: The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.7.0 authentication required."
---
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# How to resolve error: The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.7.0 authentication required.
If you're trying to set up **custom SMTP server settings** in ServiceBox and receive the following error when sending a test message:
> **Error:** The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.7.0 authentication required.
It’s likely that **Two-Factor Authentication (2FA)** is enabled on your Google account. In this case, you’ll need to generate an **App Password** to use with your SMTP settings instead of your regular Google account password.
### Step 1: Check if Two-Factor Authentication is Enabled
1. Log in to your Google Account: [https://www.google.com/](https://www.google.com/)
2. Click on the **Security** tab from the left-hand menu.
3. Under **“2-Step Verification”**, check the status.
- If it says **“On”**, then 2FA is enabled.
4. Click on **“2-Step Verification”** to manage or confirm your settings.
### Step 2: Generate an App Password for SMTP
If 2FA is enabled, follow these steps to generate a Google App Password:
1. From the **Security** tab in your Google account, scroll to **“App Passwords.”**
2. Select **Mail** from the **“Select app”** dropdown.
3. Choose **Other** in the **“Select device”** dropdown.
4. Enter a name (e.g., “SMTP Server”) and click **Generate**.
5. A 16-digit app password will be displayed. Copy this code.
### Step 3: Use the App Password in ServiceBox
When configuring your **SMTP server settings in ServiceBox**, use the **16-digit app password** instead of your regular Google password. This should resolve the authentication error and allow successful test messages.
### **Need Help?**
If you have any questions or need support, please click the Help button in your ServiceBox account or email us at **support@getservicebox.com**.
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