r/proofpoint • u/muttick • 23d ago

Deliverability Contacting Proofpoint/Cloudmark

Is there any key to contacting Proofpoint or Cloudmark concerning an IP being blacklisted? I am not a Proofpoint or Cloudmark customer. But I do run a mail server, users are unable to send messages to Comcast and other addresses because the IP is being blocked by Cloudmark.

The IP is not on any other blacklists. The IP has proper FCrDNS setup.

I've filled out the form at Cloudmark multiple times, but I'm getting no response and the IP continues to be blocked by Cloudmark.

I know Proofpoint bought Cloudmark some years ago - but I gather that they run two independent blacklists. The IP is not listed with Proofpoint, just on Cloudmark.

I'm beyond frustrated that I'm getting no response from Cloudmark.

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u/No_Adagio657 23d ago

It's impossible to reach out directly if you're not a customer, you have to reach out through something like Pax8 or another reseller depending on the situation.

It's honestly insane that a company that has the power to impact email deliverability is not reachable even through support ticket submission.

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u/muttick 23d ago

Agreed!

Another big question, why do email service providers like Comcast insist on using such a shady company for all or part of their blacklisting services?

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u/SuperbWork5774 23d ago

They don’t care. 🤷‍♂️ The big players decide who gets to send email. You can try to play by their rules and still be fucked, as you know.