IP blacklist


Since moving to cloudfare last week, we have some issues regarding the DNS and Proxy enabled.

I’ve just figured out that our IP from cloudfare is blacklisted, because one colleague was sending an email and received an statuscode 550 from microsoft.

While searching for the problem, one blacklist came up from dnstoolbox.

This IP coming from the proxy of Cloudfare.

Has any one facing this problem, are there any other setups or workarounds?
Who do I need to contact??

  • The current setup with proxy is prefered in our case.
    Since we have an Odoo.sh instance, while cloudfare proxy ensures SSL connection.

Hope to hear reactions and thoughts what you guys think…

Best regards,

Cloudflare doesn’t send the mail but you will need to setup the proper TXT records in Cloudflare such as DMARC, SPF and DKIM if you’ve got it.
Send an email to this site and they’ll let you know what you should add for your records. https://www.mail-tester.com/

*Also, if your ERP sends mail or office scanners etc., you’ll need to add them to your SPF as well.

Thanks for the fast reply.

I’ve checked, modified and score is now 10/10.
Hopefully all emails will be send correctly.


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