Feature enhancement suggestion: integration of the Sendgrid email relay server with OLMS to check email delivery status

Now OLMS customer has nowhere to know the email delivery status by themselves. If OLMS client want to know email delivery status of particular recipient, they need to raise support case for checking.

If there is a integration between email relay server and OLMS server, OLMS admin can check email delivery status directly and direct liaise with the user's email admin.