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> Every email carries two "from" addresses I made a presentation about exactly the same subject many years ago, but I was not shy of separating the SMTP protoc
by sam_lowry_ 2mo ago
> Every email carries two "from" addresses
I made a presentation about exactly the same subject many years ago, but I was not shy of separating the SMTP protocol (RFC 821 and the following ) and the email message (RFC 822 and the following).
It makes the link between SPF, DKIM and DMARC much clearer.
Anyway. The article covers just the bare minimum, and in the most obscure way.
For those interested in the inner workings of contemporary email delivery... I recommend the posts by Alex Shakhov on LinkedIn https://www.linkedin.com/in/alexshakhov/ https://www.linkedin.com/in/alexshakhov/ (Yes, there is still meaningful content on LinkedIn, it's just vanishingly rare)
- philosopherNoob 2mo agoAre those posts available without logging in? This sounds like good stuff but I can’t access it.
- sam_lowry_ 2mo agoI think he reposts them on his consulting page https://www.sh.consulting/blog https://www.sh.consulting/blog and no, I am not affiliated. Just keeping an eye on the email deliverability topic as a hoppy.
- ThePowerOfFuet 2mo agoDo you mean as a hobby?
- sam_lowry_ 2mo agoYes, did it for others and for my own business once, but this field is dead in EU. Everyone and their friend gave up on owning the email infra
- ddevnyc 2mo agoI'm sure I don't speak just for myself when I ask, can you link the presentation?
- sam_lowry_ 2mo agoI 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 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 https://mikhailian.mova.org/delivering-mails/2.png shows the second.
- ciupicri 2mo agoIf only I could read those articles without joining LinkedIn.