[caiu] hotmail bloqueando ips sem motivo

[Yves Pires Da Silva]

Senhores, os servidores hotmail estão bloqueando qualquer ip meu que faz envio de emails pra destino hotmail.com, outlook.com etc. Os primeiros 2-3 dias funciona normalmente, passado disso o IP é bloqueado.

Mensagem de erro:
------------------------------------------------------------------------------------------
<usuario em hotmail.com>: host
    hotmail-com.olc.protection.outlook.com[104.47.66.33] said: 550 5.7.1
    Unfortunately, messages from [177.129.104.22] 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.
    [MW2NAM12FT014.eop-nam12.prod.protection.outlook.com] (in reply to MAIL
    FROM command)
-----------------------------------------------------------------------------------------------

Reversos estão ok
SPF autorizados
DMARC configurado
DKIM assinado
IP não listados em blacklists
Emails com score máximo em analises: https://www.mail-tester.com/
-----------------

O volume diário de mensagens enviada com destino a hotmail/outlook é baixo se levar em conta que atendo mais de 100 domínios,  é de 400~500 emails legítimos, NFE etc..(não spam) dia.

Já abri alguns tickets.

Resposta:
------------------------------
Not qualified for mitigation
177.129.104.5
Our investigation has determined that the above IP(s) do not qualify for mitigation.

Please ensure your emails comply with the Outlook.com policies, practices and guidelines found here: http://mail.live.com/mail/policies.aspx.

To have Deliverability Support investigate further, please reply to this email with a detailed description of the problem you are having, including specific error messages, and an agent will contact you.


Regardless of the deliverability status, Outlook.com recommends that all senders join two free programs that provide visibility into the Outlook.com traffic on your sending IP(s), the sending IP reputation with Outlook.com and the Outlook.com user complaint rates.
---------------------------

Estou a deriva, não consigo nenhuma informação que me indique o motivo desses bloqueios. Cuido dos ips pelo programa https://postmaster.live.com/snds/JMRP.aspx - mas o mesmo não faz relatórios quando volume de envio por IP é inferior a 100 emails por dia.







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