GoHighLevel Email SMTP Error Guide

If you manage multiple workspaces in platforms like ClickUp and rely on the GoHighLevel CRM for email automation, correctly handling SMTP errors is essential. This guide explains how to read, understand, and resolve the most common email errors shown in GoHighLevel when connecting supported SMTP providers.

All examples and explanations below are based on the official Email Error Library for supported SMTPs so you can quickly diagnose sending issues and keep your campaigns running smoothly.

Understanding GoHighLevel SMTP Email Errors

When an email fails to send, GoHighLevel logs a specific error message returned by your SMTP provider. These error messages indicate exactly why an email was rejected or blocked and what security or configuration rule caused the problem.

Typical reasons include:

• Incorrect SMTP username or password
• Security or sign-in protection (2FA, app passwords, OAuth)
• Blocked or suspicious sign-in from a new location
• Provider-specific sending limits or policy restrictions
• SPF, DKIM, or domain authentication problems

The key to resolving these issues is matching the error message in GoHighLevel with the correct fix in your email provider’s settings.

How to Use the GoHighLevel Email Error Library

The official email error library for GoHighLevel is hosted at the link below and lists common errors with explanations and provider-specific solutions:

GoHighLevel Email Error Library for Supported SMTPs

Follow these steps whenever an email fails to send:

1. Open the email record or log inside your GoHighLevel account.
2. Copy the exact SMTP error message displayed.
3. Compare it with the error codes and descriptions from the official library.
4. Identify the SMTP provider involved (Gmail, Outlook, Office 365, etc.).
5. Apply the corresponding fix in your email provider settings.
6. Test sending again from GoHighLevel once changes are saved.

Common GoHighLevel SMTP Errors by Provider

Below is a simplified overview of how typical errors behave within GoHighLevel for major providers. Always cross-check the exact phrasing in the official library.

Gmail Errors in GoHighLevel

When using Gmail SMTP with GoHighLevel, you may encounter errors related to account security or authentication. Common patterns include:

• Messages indicating that “sign-in was blocked” or “less secure apps” are disabled.
• Errors referencing app passwords or OAuth requirements.
• Authentication failures after a password change.

Steps to fix Gmail-related issues usually include:

1. Ensuring the correct email address is used as the SMTP username.
2. Updating the password in GoHighLevel if you changed it in Gmail.
3. Enabling two-factor authentication and generating an app password, if required.
4. Reviewing any security alerts and confirming that the sign-in from GoHighLevel is safe.

Outlook and Office 365 Errors in GoHighLevel

For Outlook.com and Office 365 SMTP connections, error messages often reference policies, modern authentication, or suspicious sign-ins.

Typical fixes based on the error library include:

• Verifying that SMTP AUTH is enabled for the mailbox in Microsoft 365.
• Confirming that modern authentication (OAuth) is set up if basic auth is disabled.
• Checking conditional access or security defaults that may block SMTP connections from GoHighLevel.
• Reviewing sign-in logs for blocked attempts and approving them when legitimate.

Other Supported SMTP Providers in GoHighLevel

GoHighLevel also works with several other SMTP services. Common error themes include:

• Exceeded sending limits or hourly quotas.
• Missing or incorrect SPF and DKIM records.
• Blocked content or spam-related policies.

The resolution steps typically involve:

1. Confirming that your sending domain is verified with the SMTP provider.
2. Adding required DNS records (SPF, DKIM, possibly DMARC).
3. Reducing sending speed or volume if you are hitting rate limits.
4. Ensuring content complies with anti-spam and acceptable use policies.

Step-by-Step: Fix an SMTP Error in GoHighLevel

Use this structured workflow each time you see an error in the email logs.

Step 1: Locate the Error in GoHighLevel

• Open the contact record or the campaign where the email was sent.
• Find the specific email and open the details or log view.
• Copy the complete SMTP error message text.

Step 2: Match the Error with the Official Library

• Go to the GoHighLevel Email Error Library.
• Search for distinctive phrases or error codes from the message.
• Identify the provider section (Gmail, Outlook, Office 365, or others).
• Read the explanation and recommended fix provided there.

Step 3: Apply the Fix in Your SMTP Provider

Once you find the matching entry:

1. Log in to your email provider’s admin or account panel.
2. Adjust security, password, or authentication settings as described.
3. Update the SMTP configuration inside GoHighLevel if credentials changed.
4. Save everything and wait a few minutes for settings to propagate, especially DNS-related changes.

Step 4: Test Email Sending from GoHighLevel

• Send a test email from the same GoHighLevel location where the error occurred.
• Check whether the email is successfully delivered.
• If it fails again, re-check the error message and compare with the library to see if a different policy is now involved.

Best Practices to Avoid Future GoHighLevel SMTP Errors

To minimize future email sending problems, follow these recommended practices:

• Keep SMTP credentials updated in GoHighLevel after any password or security changes.
• Use provider-approved methods such as OAuth or app passwords wherever required.
• Verify and authenticate your sending domains with SPF and DKIM.
• Monitor daily or hourly sending limits imposed by your SMTP provider.
• Review email logs in GoHighLevel regularly to catch new errors early.

Additional GoHighLevel Help and Optimization

If you want expert help configuring your CRM, improving deliverability, or integrating GoHighLevel with other tools in your stack, you can find specialized implementation and optimization services at Consultevo.

Use the official GoHighLevel documentation and the email error library as your primary reference whenever SMTP errors appear. With a consistent process for reading and resolving messages from Gmail, Outlook, Office 365, and other supported providers, you can keep your pipelines, automations, and campaigns running with minimal downtime.

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