Spoofed senders, leaked addresses: protecting your own domain from abuse.

• Check If Your Email Was in a Data Breach (and What Hits Mean)

  Check if your email was in a data breach with services like Have I Been Pwned or HPI's Identity Leak Checker, what a hit means, and how to test passwords safely.

• Password Manager: Choosing One and Switching Over Properly

  Password manager options compared: built-in, synced or local file. How strong the master password must be, with the maths, and a 6-step plan for switching over.

• DMARC Setup: From p=none to p=reject Without Losing Mail

  DMARC setup in stages: publish a _dmarc record with p=none and rua reports, fix alignment, then move to quarantine and reject over 4 to 8 weeks.

• SPF Record Setup: Syntax, Examples and the 10-Lookup Limit

  SPF record setup done right: one TXT record, the mechanisms that count toward the 10 DNS lookup limit, ~all versus -all, and how to verify it with dig.

The three DNS records that protect your domain from forgery.

• BIMI: Getting Your Logo in the Inbox with a VMC or CMC
• Prevent Email Spoofing: What Actually Stops Forged Senders
• Read DMARC Reports: Aggregate XML Explained Field by Field
• DKIM Setup: Selectors, 2048-bit Keys and DNS Records
• DMARC Setup: From p=none to p=reject Without Losing Mail
• SPF Record Setup: Syntax, Examples and the 10-Lookup Limit

Checking whether addresses are affected, and what to do next.

• Catch-All Email Address: Your Domain as a Leak Detector
• Check If Your Email Was in a Data Breach (and What Hits Mean)
• Email in Data Breach: What to Do in the First Hour

Passwords, 2FA and recovery.

• Account Recovery Email on Your Own Domain: The Hidden Risk
• Passkeys: How They Work and Where They Replace Passwords
• Password Manager: Choosing One and Switching Over Properly

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