Error: HTTP error 403: Forbidden SendGrid

What's Causing This Error?

This error occurs when the API key you are using is not authorized to perform the requested action.

Solution - Here's How To Resolve It

To resolve this error, you can create a new SendGrid API key and select "Full Access" to provide access to all parts of your account using the API key or decide the permission scope based on your requirements.

Figure 01- Creating a new SendGrid API key

SendGrid allows you to scope permissions on three levels: Full Access, Restricted Access, and Billing Access. Granting "Full Access" will resolve this error.