Oh boy, thanks for the detail, love it. You've probably been more fortunate than you can appreciate for now. I mean, I've not yet had a DO IP which wasn't listed blocked by SNDS (Outlook private block-lists): https://sendersupport.olc.protection.outlook.com/snds/ipStat...

Would be interested to hear from others who've acquired new DO IPs that weren't blocked on that list though. Change my view of the whole scenario.