title: SendGrid Send Email Rate Limit
body: <p>SendGrid documentation explicitly mentions rate limits on all resources <a href="https://sendgrid.com/docs/API_Reference/Web_API_v3/How_To_Use_The_Web_API_v3/rate_limits.html" rel="noreferrer">here</a>. The send api (<code>https://api.sendgrid.com/v3/mail/send</code>) doesn't seem to include any <code>X-RateLimit</code> headers in its response.</p>
  
  <p>Does this mean that the send api is not rate limited?</p>