I've noticed that the big mail outfits don't take complaints seriously from small volume-mailers. They seem to assume that you're either a big mail outfit with a ton of volume to feed their algorithms or you're spam.
From: "Joseph Jenkins" <joe@breathe-underwater.com>
To: "Robert Story" <rstory@isi.edu>
Cc: "NANOG" <nanog@nanog.org>
Sent: Sunday, May 10, 2020 8:47:23 AM
Subject: Re: anyone on from hotmail.com, msn.com, live.com smtp?
No not at all, just replaced with a random address.
So nothing from MS as of yet, best I have gotten is these two addresses to go and file complaints. It's been 2 days with no response, MS isn't so attentive it seems.
So at this point we are just queuing up the messages waiting for MS to allow us to send again. What a pain.
On Fri 2020-05-08 19:35:08-0700 Joseph wrote:
> We are getting this messages when sending emails from our domain.
> We've submitted tickets, but haven't received a response yet. Anyone
> have any insights?
>
> 550 5.7.1 Unfortunately, messages from [1.1.1.1] weren't sent.
> It's our own address and everything on the Microsoft site says we are
> clean with no issues.
1.1.1.1 is your address? You are cloudfare's anycast dns server?
$ whois 1.1.1.1
[...]
inetnum: 1.1.1.0 - 1.1.1.255
netname: APNIC-LABS
descr: APNIC and Cloudflare DNS Resolver project
--
Robert Story <http://www.isi.edu/~rstory>
USC Information Sciences Institute <http://www.isi.edu/>