Technical articles on DNS, networking and IP infrastructure
Showing posts tagged #security ✕ clear
DNSSEC adds digital signatures to DNS so resolvers can detect forged answers. Here is how the chain of trust works, how to check a domain and what usually goes wrong.
If your emails suddenly bounce or land in spam, your server's IP address may be on a DNS blacklist. Learn how these lists work, how to check them and how to get delisted for good.
SPF, DKIM and DMARC are three DNS records that decide whether your emails are trusted or end up in spam. This guide explains each one in plain language and shows how to check and fix them.