I notice that you are using an AWS address..
NetRange: 52.0.0.0 - 52.31.255.255
CIDR: 52.0.0.0/11
NetName: AT-88-Z
NetHandle: NET-52-0-0-0-1
Parent: NET52 (NET-52-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: Amazon Technologies Inc. (AT-88-Z)
RegDate: 1991-12-19
Updated: 2015-03-20
Ref: https://rdap.arin.net/registry/ip/52.0.0.0
Amazon has been REALLY bad lately, and more companies are blocking
larger parts of the AWS space.
Insist that Amazon provide you with 'rwhois' or that they address this
issue for you? If you are 100% certain you aren't sending suspicious
email activity from that IP Address.
On 2020-04-21 8:52 a.m., Norbert Bollow via mailop wrote:
Maybe it's not specifically you server's IP that's on the blacklist,
but an IP range belonging to your ISP (which includes your server)?
Greetings,
Norbert
On Tue, 21 Apr 2020 10:35:38 -0500
Michael via mailop <mailop@mailop.org> wrote:
My server's IP is on the hotmail blacklist. I can't find any details
as to why. I only have four users and we don't send any bulk mail.
Mostly just a small law firm communicating with clients. I'm set up
with SNDS but I don't see any details there that let me track down
the source of the blacklisting. I just set up the junk mail
reporting. I thought I had already done that but I don't remember
ever getting any reports.
Is there any way to get off this list?
I filled out a support request and received this response:
We have completed reviewing the IP(s) you submitted. The following
table contains the results of our investigation.
Not qualified for mitigation
52.10.9.48
Our investigation has determined that the above IP(s) do not qualify
for mitigation.
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