title: SendGrid mails are always in pending status
body: <p>I am exploring to use SendGrid in one of my projects, I have followed the guide here: <a href="https://docs.microsoft.com/en-us/aspnet/core/security/authentication/accconfirm?view=aspnetcore-5.0&amp;tabs=visual-studio" rel="nofollow noreferrer">https://docs.microsoft.com/en-us/aspnet/core/security/authentication/accconfirm?view=aspnetcore-5.0&amp;tabs=visual-studio</a></p>
  <p>after setting up the things, when I send emails, they are stuck at this point:</p>
  <p><a href="https://i.stack.imgur.com/s01bq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/s01bq.png" alt="mails pending" /></a></p>
  <p>There are few other mails that I tried to send to Gmail, they are still in pending status.</p>