Thanks, @cinergi for bringing this up!
I’m running my own mail server for about 8 years now, a few years back I moved from another OS e-mail to MIAB hosted @ Linode for a few years now.
Never had direct rejections from MS domains and my mail server sends a couple of dozens of personal emails per month. I am in on MS SMDS and their Junk Mail Reporting Program since the beginning with MIAB@LInode. This did not help much up-to this day - always my e-mails sent to Outlook/Hotmail recipients arrive in the spam/junk folder, which is very annoying! Never had an issue with e-mails sent to Gmail over the years to be classified as spam/junk not once or any other provider!
Definitely start thinking of boycotting MS domains and sending them by default into the SPAM - E4E fashion! It sounds like MS statement is you do not pay us to host your e-mails, and you’re not big enough for us to care, so we’ll fit your mails in the SPAM by default?
Just for the record recently I deployed another MIAB for a friend as he is starting his own business and this time I did host his mail @ Digital Ocean for 4 months now. The other day he called me said I couldn’t send e-mails to MS Outlook/Hotmail recipients they all get rejected. Checking further it was clear that his IPv4 address was only on a UCEPROTECTL3 list now is the MS subscribed to it well?
Looking at the details these scammers @UCEPROTECTL3 does not have a way to request unblock unless you pay the hefty price tag for it? They were very generously blocking IPv4/18 blocks, altho UCEPROTECTL3 said that his IPv4 was not directly related to the spam score on Digital Ocean they were still blocking 16,382 addresses from DO, and my friend’s MIAB was one of them! Not only that I did move friend’s VM snapshot to another region on DO and guess what it was in that same list UCEPROTECTL3 another /20 blocks blacklisted. Was curious then checked another DO server IPv4 in the third region and guess what?
Contacted DO support and they said we are not a mail platform provider and can’t/won’t do anything about UCEPROTECTL3, and steered me to go to MS/Gmail or pay to SMTP relay services and discouraged me from running my own mail server, well just because it’s difficult and complicated this does not mean we should not try it!
The interesting part was that yesterday my IPv4 from Linode got under the same general /00 L3 block all on that same list - as someone mentions the list is dynamic and tomorrow Vultr ranges could end up on this same scammers lists.
I’m sorry for ranting about it, but your post hit a “sweet” spot, so I could not hold myself not to pitch in.
So what’s the solution? Why should an independent/privacy orientated mail providers like us have to pay third parties to get their personal mail delivered reliably?