If you want to receive a SendGrid email every time you receive a new Event Webhook post, you can do that using Zapier.
You will need:
To establish a Webhook on Zapier, you will need only your Zapier account. Zapier will set up a custom Webhook url, for information on how to get started using these Webhooks, check here.
To link your Webhooks on Zapier to SendGrid, you must have an active SendGrid account. To learn more about getting started with SendGrid basics, start here. For more information about getting started with SendGrid on Zapier, go here.
Click here to Send emails through SendGrid for new caught Webhook data.
Now test the Zap to make sure it works. Once you’re satisfied with the results, new Webhook payloads will automatically cause a corresponding SendGrid email to be sent.
Note: if you ever want to change this Zapier and SendGrid integration, just go to your Zapier dashboard and tweak anything you'd like.