alt Hacker NewsIt feels like there's quite a lot of spin on this. There's no hint as to how many users were actually affected. It only really seems to mention Estonia, and probably only a region of it.
The ISP there claims they haven't received any reports of SPAM. But that sounds wrong. No reports probably means your reporting system is broken.
So putting that together, it seems like a small ISP screwed up and let spammers go wild, and Outlook blocked them for it. I can't really fault Outlook for that.
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Someone recently leveraged some kind of automated spam attack against my domain using Zendesk's email servers. For some reason, Zendesk doesn't enforce SPF and DKIM checks when opening new tickets, so I got flooded with "your new account has been registered" and "thank you for filing a ticket" emails.
I blocked off Zendesk entirely because they didn't fix their shitty email system. The other newsletter mail services (mailgun/sendgrid/etc.) are just as bad for this.
There are plenty of reasons why large email senders could (and should) be on reputation blacklists. None of these email delivery companies seem to care very much about the spam they send until shit hits the fan, and now that it did it seems everyone blames the people maintaining the blacklists.
> There's no hint as to how many users were actually affected.
How many users would you see as the threshold then?
Since you stated that there is a spin to this, how many users would go over your defined threshold level?
The article has hyperlinks in it, e.g. to this:
https://learn.microsoft.com/en-us/answers/questions/5786144/...
which comes from an ESP serving millions of users.
My org (USA) was affected. I wasn't the primary person dealing with it, but from what I gather one user marked one of our emails as junk, and then suddenly all of our emails to Outlook users started getting blocked.