Same thing here, SpamCop is reporting this ip every time my vendor sends me an invoice:

Event:	rejected
User:	-remote-
Domain:
From Address:	bounces+2327135-1053-admin=[email address removed]
Sender:
Sent Time:	Jul 7, 2022, 11:17:23 PM
Sender Host:	o4.e.notification.intuit.com
Sender IP:	167.89.82.160
Authentication:	unauthorized
Spam Score:	0
Recipient:	[email address removed]
Delivery User:	(removed for security purposes)
Delivery Domain:	(removed for security purposes)
Delivered To:
Router:	reject
Transport:	**rejected**
Out Time:	Jul 7, 2022, 11:17:23 PM
ID:	1o9gMr-0002KQ-nJ
Delivery Host:	o4.e.notification.intuit.com
Delivery IP:	167.89.82.160
Size:	0 bytes
Result:	JunkMail rejected - o4.e.notification.intuit.com [167.89.82.160]:8954 is in an RBL: Blocked - see https://www.spamcop.net/bl.shtml?167.89.82.160

I will never upgrade my incredibly-old version of quickbooks, it works without issue, unlike all this garbage of online versions. This is clearly an issue with Intuit's IT department's inability to keep their mailservers off blacklists!

As for not being reported very much, I can guarantee you that if quickbooks customers realized their emails were being blocked by the servers, they'd be calling in. As for my vendor, he's clueless about this issue and whined that I hadn't paid an invoice he sent weeks before contacting me about it. This has been going on for 3 months now! I researched the issue, found his email blocked by my mail service provider's spam system (Spam Cop is what they use), explained to him its not on me but on him to get Quickbooks to get their servers whitelisted on there, and it obviously went right over his head as he's not a tech person. I would bet that there's thousands of folks out there in the same boat, inept at IT issues and clueless as to why its happening and who to contact!

And just how many of these folk's ISP's are just as clueless and telling their customers that they should "just try sending it again, it should go through shortly"?

As the official "quickbooks community", it should be monitored 24/7 by quickbooks and they should automatically report these types of findings with more than a handful of similar issues posted here! Amazing that a company like quickbooks can't figure out how to keep their mailservers off the blacklists of the internet, and even more amazing that after 4+ months of being reported, it STILL hasn't been fixed! Each and every one in the IT department should be immediately fired and a new batch of techs hired to get it running!