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If only I could read those articles without joining LinkedIn.
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Are those posts available without logging in? This sounds like good stuff but I can’t access it.
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I think he reposts them on his consulting page https://www.sh.consulting/blog and no, I am not affiliated. Just keeping an eye on the email deliverability topic as a hoppy.
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I'm sure I don't speak just for myself when I ask, can you link the presentation?
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I can't share all of it, but to understand the relationship between SPF, DKIM and DMARC one should know that DMARC covers two possible cases. Either DKIM domain must match From: domain or MAIL FROM domain must match the From: domain plus the IP address of the sender should pass the SPF check

https://mikhailian.mova.org/delivering-mails/1.png shows the SMTP plaintext chat for the first case,

https://mikhailian.mova.org/delivering-mails/2.png shows the second.

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