Docs Error Library Authentication Errors Error: 403 Forbidden

Error: 403 Forbidden

What Is Causing This Error?

The ‘403 forbidden’ error indicates that the account you’re trying to authenticate in your SMTP plugin doesn’t have the correct permission to send emails.

It often occurs when sending emails using SendGrid SMTP services. If the API key on your SMTP plugin doesn’t have mail sending capabilities, you’ll likely encounter this error.

Resolving the Error – Solution

To fix the ‘403 forbidden’ error, you’ll need to check and update your API key permission settings.

To check that your API key has the correct access level, log in to your SendGrid account and navigate to Settings » API Keys.

This will bring you to a page with all your available API keys. Click the Settings gear icon and select Edit API Key for your SMTP plugin’s API key.

Edit SendGrid API key
In the API Key Permissions section, be sure that the Restricted Access option is selected.
Select restricted access option

After that, additional permissions will appear for you to configure. Scroll down to the Mail Send setting and be sure the permission level is set to Full Access.

Update mail send access

That’s it! Now you know what’s causing the 403 forbidden error and how to resolve it.

If you’d like to learn how to troubleshoot other common errors, check out the following tutorials: