### [Unauthorized: Not Verified or IP Not Authorized](https://wpmailsmtp.com/docs/brevo-unauthorized-not-verified/)

**Published:** May 22, 2026
**Author:** David Ozokoye

**Content:**

**Note**: This guide applies to the [Brevo mailer](https://wpmailsmtp.com/docs/how-to-set-up-the-sendinblue-mailer-in-wp-mail-smtp/ "Brevo") in WP Mail SMTP.

## What This Error Means

Brevo’s IP authorization security feature blocked the API request. Both error variants come from the same feature:

- **`unauthorized: not verified`**: Brevo detected an unknown IP, sent a verification email to the account owner, and the IP hasn’t been confirmed yet.
- **`unauthorized: IP not authorized`**: IP security is active and this IP is not on the authorized list.

For accounts created after May 16, 2024, this feature is enabled by default. It also activates automatically on older accounts if no new IPs are detected for 30 days.

## Common Causes

- Brevo IP authorization is enabled and your server’s IP hasn’t been whitelisted
- Brevo sent a verification email after detecting your server’s IP for the first time, but the email was missed or the link inside wasn’t clicked
- Server IP changed (e.g. new hosting, CDN, server migration) and the new IP isn’t on the authorized list

## How to Fix

Here is the complete step-by-step guide to resolving the error.

### Option A: Whitelist Your Server’s IP (Recommended)

Start by logging in to your [Brevo](https://app.brevo.com "Brevo") account. Then, click your **organization name** in the top-right corner and select **Settings** from the dropdown menu.

![Click your organization name in the top-right corner](https://wpmailsmtp.com/wp-content/uploads/2026/03/click-settings-tab.png)Next, click **Security** in the left sidebar and open the **Authorized IPs** tab.

![Click the Authorized IPs tab](https://wpmailsmtp.com/wp-content/uploads/2026/05/security-click-authorized-ips-tab.png)Then, click **Authorize IP address** to open the dialog.

![Click Authorize IP address](https://wpmailsmtp.com/wp-content/uploads/2026/05/authorized-ips-click-authorize-button.png)Select the appropriate **IP address format** (e.g. IPv4) and enter your server’s outbound IP address in the field.

![Enter your server's outbound IP address](https://wpmailsmtp.com/wp-content/uploads/2026/05/authorized-ips-enter-ip.png)**Note**: To find your server’s IP, check your hosting control panel (cPanel, Plesk, etc.) or contact your hosting provider and ask for the outbound or external IP address.

After that, click **Authorize IP address** to submit. If Brevo previously sent you a verification email (subject line: “Validate your IP address”), check your inbox and click the link inside to authorize the IP from that earlier request.

![Click Authorize IP address to submit](https://wpmailsmtp.com/wp-content/uploads/2026/05/authorized-ips-click-submit.png)To test the fix, log in to your WordPress admin area and go to **WP Mail SMTP » Tools**, click the **Email Test** tab, and click **Send Email**.

![Test email tab](https://wpmailsmtp.com/wp-content/uploads/2024/10/test-email-tab-1024x1002.png)Finally, look for the success message and check your inbox to confirm the email arrived.

### Option B: Disable IP Authorization

Use this option only if whitelisting individual IPs is impractical (e.g. your hosting provider rotates IPs frequently).

Start by logging in to your Brevo account. Then, click your **organization name** in the top-right corner and select **Settings** in the dropdown menu.

Next, click **Security** in the left sidebar and open the **Authorized IPs** tab.

![Click the Authorized IPs tab](https://wpmailsmtp.com/wp-content/uploads/2026/05/security-click-authorized-ips-tab.png)Finally, click **Deactivate blocking** to disable IP address blocking for API calls.

![Click Deactivate blocking](https://wpmailsmtp.com/wp-content/uploads/2026/05/authorized-ips-click-deactivate-blocking.png)After that, return to your WordPress admin area and send a test email from **WP Mail SMTP » Tools » Email Test** to confirm the fix.

## Notes

- Option A is preferred. Disabling IP authorization entirely reduces your Brevo account security.
- If you saw the `unauthorized: not verified` variant specifically, Brevo has already sent a verification email to the account owner. Check spam or junk folders if you don’t see it. Clicking the link authorizes that one IP for that session, but add the IP to the permanent allowlist (Option A) to prevent recurrence.
- If the error persists after whitelisting, confirm the IP you added matches your server’s actual outbound IP. Some hosts use different IPs for inbound traffic and outbound API calls.
- If your server is behind a proxy or CDN (e.g. Cloudflare), the outbound IP for API calls is typically your origin server’s IP, not the CDN’s IP.

That’s It! You now know how to fix the ‘Unauthorized: Not Verified or IP Not Authorized’ error in Brevo and get your emails sending again through WP Mail SMTP.

**Categories:** Brevo Errors, Error Library

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