Delivery Failed to my Email Routing?

Hey so I have Email Routing set up on a domain of mine and I came across this error, is it a Google Issue or Cloudflare Issue?

Seems very odd for Google to fail from their own bulk sending rules? lol

Rejected reason:
upstream (aspmx.l.google.com.) temporary error: Unknown error: transient error (421): 4.7.28 Gmail has detected an unusual rate of unsolicited mail. To protect4.7.28 our users from spam, mail has been temporarily rate limited. For4.7.28 more information, go to4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError to4.7.28 review our Bulk Email Senders Guidelines. d9443c01a7336-29b5b128aaesi18477325ad.164 - gsmtp
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The guidelines in this article can help you successfully send and deliver email to personal Gmail accounts. Starting in 2024, email senders must meet the requirements described here to send email to G
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