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Comment by inferiorhuman | Hacker News Reader

  How did they have access to those internal IP scores?

When I was doing DMARC stuff professionally, plenty of big names were willing to send DMARC reports our way. Microsoft was the only company to give us full text.

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Well, you can (and should!) set up your DMARC preferences through your DNS records and enable a mailbox to receive those reports, which you can then use to verify if you have any/some problems with particular providers. This is totally free and standard.

But the score I am speaking of was something different: it was the reputation assigned by Microsoft (i.e., something internal) to the IPs from which we sent e-mails. This score was used to determine how many e-mails sent from those IPs would pass/fail MSFT's filters. And to have access to the score and improve it, we had to pay a 3rd. party :).

in outlook's admin console, there are a few tools related to antispam, including a way to view stats about why or why not a specific email got sent to spam. IIRC it exposes the sender's reputation score among other things.

>enable a mailbox to receive those reports

Thanks for mentioning this. Have set DMARC preferences in DNS for ages but never configured a mailbox to receive the reports. Will try it out.

Right. We were a third party to all of that, so I meant full text messages for Microsoft's customers. Even Facebook didn't do that.

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