Auto-forwarding from a Google Group
Open up your mailbox under Manage > Mailboxes. Here select the Connection Settings on the left menu.
On the Connection Settings page, click on the Incoming tab, and you'll see the unique identifier address which is your forwarding alias. Copy it to your clipboard and head over to G Suite Group.
Go to Google Groups and log in as the administrator for your group.
Click the My groups button or My Groups on the left navigation menu to manage your existing groups.
On this page, you'll see the groups you belong to. Click the Manage group link under the name.
Take a look at the left-hand sidebar. Under the Members dropdown, select the Direct add members option. We need to manually add that unique forwarding address to the group member list.
Paste your forwarding address in to the top text box. Compose a welcome message, and select the All Email subscription option, since you'll want to send everything to HelpNinja as it rolls in. Click the Add button at the top of the page when you're finished.
Complete the verification process in order to add a new member to your Google Groups.
That will do it - head back into Help Ninja to see your emails in your mailbox!
Next steps: Set up SPF and DKIM to allow Help Ninja servers to send emails on your behalf, or set up Google oAuth or use your own mail server to have your email sent from your Google Group.