• Is the internet connection working?
  • Check the queue tab to see if there are emails waiting to be sent.


  1. Verify username and password are correct. Go to sendgrid.com and log in to test your credentials.
  2. Verify there are only Latin characters and the message is under 600 characters.


  1. Verify email credentials are correct with email provider. Some user names may be a full email address or simply just a user name.
  2. Try a different port.
  3. Try a secure port or enabling security.