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$ ls topics/smtp/

SMTP

2 articles.

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  1. Shield11 min read

    The evolution of Shield's mail flow architecture

    Three versions of Shield's mail flow architecture, from a blunt MX record to a design that hands the last mile back to Microsoft, and what changed each time along the way.

    Christian Maddox·Senior Software Engineer
  2. SMTP3 min read

    HELO, world!

    Why an email security company is starting an engineering blog, and what we plan to put here.

    Ben Hathaway·Chief Technology Officer