Cloud Flare DNS 1.1.1.1 WHM Resolver Configuration
Cloudflare has a blacklisted IP address for email deliverability



DNS 1.1.1.1 / 1.0.0.1 8.8.8.8 / 8.8.4.4


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Blacklisted
DNS
RBL
BLocked for Spam Reason

Cloudflare IP addresses associated with a customers account are never used to send email. They are only used to accept inbound http/s requests.
This RBL has added the entire Cloudflare ASN, so there are no Cloudflare IP addresses not covered by this. They have also added all of Digital Ocean and AWS. An RBL can add any set of IP addresses they want RBL maintainers tend to be zealots that way. No sane person would use this RBL.

Cloudflare doesnt proxy outbound email ever.
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DNS Google

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8.8.8.8
8.8.4.4

:
https://community.cloudflare.com/t/c...rability/26915
https://community.cloudflare.com/t/b...ed-ip/60294/10