Microsoft-chek-email-easy-trademarks.com

I wonder why Microsoft don't accept email frоm our dedicated IP-address 88.198.83.90 despite of we have all settings concerning delivery email set up propely(SPF,DKIM,A,PTR-records)
Our server IP-address isn't in black/spam list, we don't sent a lot of email

For example, let's consider our domain easy-trademarks.com(88.198.83.90) and  all email settings


Response from Microsoft mail server

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  ramez.dous@hotmail.com
    host hotmail-com.olc.protection.outlook.com [104.47.55.161]
    SMTP error from remote mail server after pipelined MAIL from:<sysadmin@easy-trademarks.com> SIZE=2538:
    550 5.7.1 Unfortunately, messages from [88.198.83.90] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [BN8NAM12FT066.eop-nam12.prod.protection.outlook.com 2023-05-22T11:57:51.362Z 08DB59E499E4A279]
Reporting-MTA: dns; hosting1.amoriltd.com

We have correctly set up SPF and DKIM records

# dig @8.8.8.8 +short TXT easy-trademarks.com
"v=spf1 +a +mx +ip4:176.9.70.216 ip4:88.198.83.90  ~all"


# dig @8.8.8.8 +short TXT default._domainkey.easy-trademarks.com
"v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAl8/q8SYp+AbEHLu0NLhndKVSJ3kVX1We+m60Q3PsZNFhZft2Z9nc28LJasiWmCfCwlRufP+cLpOJLBSx0KtbkgQhT1Wv0BsKhDgvvFn5CNfqAQIpzDv2amWo3q8WZUWwahKd2B+IAiXVgQDSSt9l6fAbfU/TTDLnJsbJQE9kzdDGqgfEU2hMmIqnRTA+vni1L" "NU2Y8hXJvAz6KAOsRVBmMT0M4vZaH2vGnPlBtog2+M688N7AalNANy0+cn8BCGjIHdr7IWymcQ4jOxRwJw9nS1aJbnFfa5VqhEaMt1qlJtuQev0axUQ9DVD8Mg0F1rz66x39q+YcmO1NBZhuUzBtQIDAQAB;"

We have correctly set up A,PTR-records for our mail server(176.9.70.216)

# hostname -f
hosting1.amoriltd.com

# dig @8.8.8.8 +short A hosting1.amoriltd.com
176.9.70.216

# dig @8.8.8.8 +short -x 176.9.70.216
hosting1.amoriltd.com.

And for sending email adress as well(f.e. 88.198.83.90)

# dig @8.8.8.8 +short -x 88.198.83.90
mailip2.amoriltd.com.

# dig @8.8.8.8 +short mailip2.amoriltd.com
88.198.83.90


As IP-address of our domain(88.198.83.90) isn’t in black/spam lists as well

https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3a88.198.83.90&run=toolpage


As IP-address of our domain(88.198.83.90) has Neutral reputation
https://talosintelligence.com/reputation_center/lookup?search=88.198.83.90


We don't send a lot of email from our domain(88.198.83.90)
https://talosintelligence.com/reputation_center/lookup?search=88.198.83.90#email-history


I have checked your policy here
https://sendersupport.olc.protection.outlook.com/pm/policies.aspx
Nothing is new for me



Please unblock our subnet 88.198.83.88/29 (not only 88.198.83.90/32)
Due to we use this subnet to send emails for different our domains
and all email settings for other ip-addresses in our subnebt are set up the same properly as and for ip-address 88.198.83.90/32

# grep 88.198.83 /etc/mailips
abt-academy.org: 88.198.83.89
accountantpressroom.com: 88.198.83.89
alyafigroup.com: 88.198.83.89
events.alyafigroup.com: 88.198.83.89
dr.alyafigroup.com: 88.198.83.89
arabcpa.net: 88.198.83.89
chehab-law.com: 88.198.83.89
easy-trademarks.com: 88.198.83.90
gajournal.com: 88.198.83.90
gtvolt.info: 88.198.83.90
gtyafi.com: 88.198.83.90
iagazette.com: 88.198.83.90
ianewsletter.org: 88.198.83.91
ifnewsletter.com: 88.198.83.91
me-scaleup.com: 88.198.83.91
draft.me-scaleup.com: 88.198.83.91
menaf.net: 88.198.83.91
mooresrowland.asia: 88.198.83.92
mooresrowland.ca: 88.198.83.92
mooresrowland.co: 88.198.83.92
mooresrowland.la: 88.198.83.92
mooresrowland.me: 88.198.83.92
mooresrowland.net: 88.198.83.92
mooresrowland.org: 88.198.83.92
mooresrowland.us: 88.198.83.92
mri.group: 88.198.83.93
taxproviders.tax: 88.198.83.93
w2wconsulting.com: 88.198.83.93
xpertproviders.com: 88.198.83.93
yafico.com: 88.198.83.93