Browse all articles, tutorials, and guides about Email
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Networking
|11 min read
DMARCbis Is Here: What Changed in the New DMARC and What to Do to Your Records
DMARC finally became a real internet standard in 2026. The pct tag is gone, there are two new tags, and the Public Suffix List is out. Here is what actually changed and the exact edits to make to your DNS.
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.