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How much do existing services trust new email service providers? It would seem to be an uphill battle for Cloudflare to start a new service. It's easy to automate from the start, meaning it's easier to send spam. I suppose reputation is not simply based on the domain the email comes from?

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Hi, I work on this team at Cloudflare. We've been sending email for years via our free email routing product and email sending is built on top of the same infrastructure, code and knowledge.

I hope you've (your org) been able to curate something resembling higher level contacts with Microsoft. They seem to be the single largest email provider that consistently has deliverability issues.

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