Internet standards, RFCs, and protocol specifications.
3 articles
RFC 10023 describes a DNS signal for domains that are for sale, even while their websites and email remain active. Learn how to read the _for-sale TXT record and what to check before contacting a seller.
Persistent DNS validation does not guarantee renewals without intervention. Here is its status on October 11, 2026 with draft -02, its limitations and the criteria for deciding whether it suits your TLS setup.
DMARCbis replaces RFC 7489, drops the PSL in favor of the DNS Tree Walk, adds three tags and splits reporting into three documents. This guide covers everything: how it works, migration, compliance.