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twitter.com/DanielMicay/st No progress made on this after filing multiple support requests through the form they provide for it. I don't think that support form goes anywhere. I could always send an email to every public Microsoft address associated in any way with email projects.

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Daniel Micay

@DanielMicay

Jul 29, 2021

I'd appreciate it if someone at Microsoft could get both mail.grapheneos.org IPv4 addresses removed from the SNDS spam list: 51.161.8.140 (static IP of the server) 51.222.17.218 (newly assigned floating IP so we can avoid dealing with this in the future by moving it around)

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Daniel Micay

@DanielMicay

Aug 11, 2021

An alternative is that I could keep buying floating IPv4 addresses from OVH until they give me one Microsoft hasn't blacklisted. It's not that expensive but I find the concept ridiculous. I should probably just do this so attestation.app alert emails work for those users.

attestation.app

Device integrity monitoring

Hardware-based remote attestation service for monitoring the security of Android devices using the Auditor app.

Daniel Micay

@DanielMicay

Aug 11, 2021

If we switch to a new sending IP address, it's possible it will be blacklisted elsewhere. It's ridiculous since they've never received spam emails from our domains and we have DNSSEC + enforcing DMARC so they can see it's from us. It should bypass a blacklisted IPv4 address.

Daniel Micay

@DanielMicay

They don't support IPv6 so we have to use these recycled IPv4 addresses to send them email. Zero issues with any provider other than Microsoft and Office 365, etc. are fine with us. It's only hotmail.com / outlook.com with their broken IP blacklist system.

11:28 AM · Aug 11, 2021Twitter Web App

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A temporary workaround would be swapping the mail server with one of our web servers without a blacklisted IPv4 address. I want a long-term solution though which means having a floating IPv4 address that's not blacklisted, which means playing the lottery ordering more of those...

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i know a few people who have been stuck on the microsoft block-list for several years now, where even speaking to someone there hasn't helped 😕

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It costs $2.88/month per floating IPv4 address so I could keep ordering them until I get one that isn't blacklisted by Microsoft. I'm unsure what portion of them tend to be blacklisted though and I don't really want to waste a bunch of money buying dozens of these IP addresses.

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