1. Open the URL: https://sendgrid.com/ . You may click on try for free to register.
2. Under API Settings, click on create new API Key from Sendgrid.
3. Go to Admin > Profile screen on PropSpace and select the Marketing tab.
4. Under API key type, select your bulk email provider as sendGrid from the dropdown.
5. Copy the correct API key from SendGrid and paste it under the API Key field.
6. Click on Validate to confirm the key.
7. Click on Update Profile when done.