SMTP
Browse all articles, tutorials, and guides about SMTP
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DevOps
|13 min read
What Sending a Developer Newsletter Actually Takes
A newsletter looks like a for-loop over an address list. It is not. Here is the infrastructure behind the DevOps Daily newsletter: sending domain and DNS, bounce and complaint handling, one-click unsubscribe, idempotent scheduling, and the Message-ID that makes any of it debuggable.
Networking
|12 min read
Send an Email by Hand: The Raw SMTP Conversation (and Why You Should Not Do It in Production)
You can open a socket to a mail server and type an email one command at a time. Doing it once teaches you what every email API hides. Here is the full SMTP conversation, byte by byte, and the exact reasons production sending needs more than a telnet session.