Hi, could you please make me understand why the emails sent by this sender do not reach my inbox? PmdEi899qflb [email protected] [email protected] 10 minutes ago Delivery Failed SPF status pass DMARC status pass DKIM status pass Rejected reason: Unknown error: transient error (421): 4.7.0 [104.30.8.83 19] Gmail has detected that this message is4.7.0 suspicious due to the very low reputation of the sending domain. To4.7.0 best protect our users from spam, the message has been blocked. For4.7.0 more information, go to4.7.0 Why has Gmail blocked my messages? - Gmail Help e9-20020a170906c00900b00a46cd89f0c2si283549ejz.780 - gsmtp
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Welcome to the Cloudflare Community. 
Google provided the reason in the NDR message that you shared.
Was the sending domain in question recently registered?
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Google provided the reason in the NDR message that you shared.
your comment didn’t help mate, you better refrain from commenting or give people a hand if you lose time answering.
The point to asking a community is getting answers not more questions, so if you can help please do, if not at least refrain from useless comments ; A lot of your replies in this forum are like “you should already know this/ you have to read x”.
I quoted the part of the reply that contained the reason. I can paraphrase it for you if it was still unclear.
Google is refusing to accept the email because they do not like the sending domain.
Whether or not they will change their opinion about the sending domain is something that only Google can answer.
Email forwarding has been an unreliable delivery method for over a decade. That is unlikely to change. The only guaranteed solution is to stop using email forwarding and switch your MX to a server that is configured to accept email for your domain. That requires selecting an email provider that offers customizable spam filtering rules, which is something typically missing from free and budget email providers.
Capsice?
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Si segnor this is more than clear now! Thanks.
However when i’m sending the email directly to my gmail account google doesn’t cry anymore that’s why i was thinking that maybe adding SPF/dkim/dmark on my domain could be the fix of keeping cloudlfare as relay.
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If happening.xyz is the domain in question, it has valid SPF for email sent from Microsoft 365 Exchange Online. It doesn’t have any DKIM configured. DKIM is important because SPF cannot survive forwarding and DKIM usually does.
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