On 2021-03-04 01:54, Suresh Ramasubramanian wrote:

Do you see email providers of significant size using it?

--srs

Potentially Microsoft [https://www.e-shot.net/insights/help/half-of-the-internet-is-blacklisted-uceprotect].

Office 365 Support has referred to uceprotect-level3 as a possible cause of why my mail gets delivered to the junk mail folder for their clients (https://pasteboard.co/JQYtxM2.png).

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Regards,
Kristijonas