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Domain security, in plain language
Short guides to the exposures we see most often, what they mean, and the exact records that fix them. Every one ends with a free scan of your own domain.
Email authentication
How to fix a DMARC p=none record and stop domain spoofing
A p=none DMARC record leaves your domain open to spoofing. Here is what p=none means, why it is not protecting you, and the exact record to move to quarantine and then reject safely.
Read the guide · 5 minMail transport security
What is MTA-STS and why your domain needs it
MTA-STS stops mail to your domain being quietly downgraded to an unencrypted connection an attacker can read. Here is how it works and what it takes to turn it on.
Read the guide · 5 minBrand and domain abuse
Lookalike domains: how to find and stop domain impersonation
A domain one character away from yours can send invoices and phishing that look like they come from you. Here is how lookalike domains work and what you can do about them.
Read the guide · 5 min