Tell me if I understand your issue.
You are using the "Scan and Send" feature on a C5550i to send scanned documents to a Fax service, but are unable to have the Fax confirmation pages sent to a G-Suite address?
Is this what you meant?
G-Suite uses ports 465 or 587 as its outgoing IMAP or SMTP server. It require SSL or STARTTLS authentication. If these are not configurable options on your printer, you cannot send confirmation emails to a G-Suite account from the printer.
FYI - You may also have to enable "Allow Less Secure Apps" in your G Mail accout settings to use relay from the printer or Fax service. Goole that term and you'll find it.