Not done yet? Start with
SendGrid — account and domain setup.
What BeRocker asks for
Connect it
1
Open Integrations
Settings → Integrations → Email → SendGrid → Configure. The dialog is called
Update SendGrid settings.
2
Paste the API Key and Domain
Set Status to Active.
3
Click Apply
The card should show Status: Active in green.
4
Point your email address at it
Settings → Profile → User Contacts → Add user contact → Channel = Email,
Provider = SendGrid, your sending address in Email, Status = Active, and tick
Is Default?.→ Profile

Step-by-step walkthrough
The recording predates the Domain field. Fill that in too — the steps are otherwise identical.
Before you send at volume
Domain authentication alone is not enough. Get SPF, DKIM and DMARC right or your quotes end up in spam. → Email deliverabilityTroubleshooting
Related
Email deliverability
SPF, DKIM and DMARC.
Profile
Set your default email contact.