Email & Infrastructure | Paul O'Brien — Insights

DKIM: Proving a Message Wasn’t Changed — Not Who Sent It

DKIM Proves Message Integrity — Not Sender Identity

SPF: What It Really Proves — and Why It Fails So Often

SPF: What It Proves — and Why It Fails So Often

Spamhaus, Spam, and the Shape of Modern Email Filtering

Spamhaus & the Shape of Modern Email Filtering

SPF, DKIM, and DMARC: How Email Authentication Actually Works

SPF, DKIM & DMARC: How Email Authentication Works

Your Email Address Is Still Your Weakest Privacy Link

Your Email Is Your Weakest Privacy Link

Why Spam Isn’t Disappearing — It’s Just Changing Shape

Why Spam Isn't Disappearing: How It Evolved

What “Zero-Access” Really Means (And Why Email Providers Use It)

Zero-Access Encryption: What It Really Means

Why Using Your Own Domain for Email Makes Sense

Why Using Your Own Email Domain Makes Sense

Free vs Paid Email: What You’re Really Paying With

Free vs. Paid Email: What You Really Pay With

It’s Not If Your Email Provider Gets Hacked — It’s When

It’s Not If Your Email Gets Hacked — It’s When