I am reliably informed that the SMTP Field Manual published by Postmark (first mentioned here) has been comprehensively updated, with lots of new information, including provider/receiver descriptions, postmaster links and resources, troubleshooting steps, insight for individual SMTP response codes, and more. Great job, Postmark team! Check it out here.
I am reliably informed that the SMTP Field Manual published by Postmark (first mentioned here) has been comprehensively updated, with lots of new information, including provider/receiver descriptions, postmaster links and resources, troubleshooting steps, insight for individual SMTP response codes, and more. Great job, Postmark team! Check it out here.
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