On Wed, Aug 16, 2023 at 09:12:44AM -0400, pgnd via Postfix-users wrote:
> 4 0.321516 192.0.2.25 → 52.101.62.16 SMTP 121 S: 220
> mx1.example.net ESMTP .
Your server's hostname and served domains continue to be hidden. Are
you perhaps willing and able to post those details? Without that
information, no further differential diagnostics are possible.
> 4 0.318693 192.0.2.25 → 209.85.128.182 SMTP 133 S: 220
> mx1.example.net ESMTP .
I am assuming your server's name isn't actually mx1.example.net,
certainly not what Microsoft is connecting to, since that name has no IP
address in the public DNS (example.net is an IANA reserved name for use
in documentation).
--
Viktor.
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