Businesses can create a sender policy framework (SPF) record on a domain to detect email spoofing and block spam. The SPF record defines authorized mail servers in the domain name system; if the ...

I'm writing some playbooks to set up an XMPP server and that requires a couple of DNS entries. I have my playbook working on Route 53, but I'd like to make this usable for people who might not be ...

How I got my business emails through spam filters with SPF, DKIM, and DMARC ...

I know this breaks the RFC/standard/whatever, but I want to know if there is any real world downside. When setting up DNS entries in a Windows environment, I will create a zone for a single A record ...

DNS can be tricky. There is a lot to know and, even when you think you have a firm grasp on it, surprises still pop up. Reverse DNS and PTR record configuration is one of those sneaky topics, but it’s ...