Here is one nifty service that can dig up useful information about a website, a domain or an IP address and it doesn’t cost a dime.
How to set up DMARC
The relentless onslaught of spam continues to drive mail administrators up the proverbial wall. DMARC, the unofficial successor to SPF (Sender Policy Framework), holds the promise of more email legitimacy, but can it deliver? Here is how you can put DMARC to the test.
Fixing DNS: why you need a Trusted Recursive Resolver and DNS over HTTPS
The DNS system is broken. The sorry state of DNS security exposes your server and your end users to a variety of risks. Some of those risks are preventable.