Registrars, DNS record configuration and email routing, with the failure modes named — dangling CNAMEs, transfer locks, and forwarding that silently drops mail.
ALIAS is not a DNS record type — it is a vendor extension that disappears when you change providers. Here is what the standards actually forbid at the apex, how Cloudflare's CNAME flattening works instead, and the three failure modes that look like DNS issues but are not.
Sep 23, 2026Most email outages after a DNS change are caused by one setting: a record that handles mail sitting behind a proxy. Here are the rules that matter, the SPF lookup budget people exceed without knowing it, and the migration order that no provider documents.
Sep 23, 2026TTL is the only lever you control in a DNS change, and two facts about it are widely unknown: negative answers are cached too, with a TTL taken from a different field, and on a proxied record your TTL setting is ignored entirely. Here is how to prepare a change properly.
Sep 23, 2026DNSSEC is the one DNS feature where a configuration mistake takes your whole domain offline rather than degrading it. Here is what the DS record does, the order of operations that makes it safe, why it has no documented SEO benefit, and the record that solves a similar problem with far less risk.
Sep 23, 2026A registrar transfer is one of the few domain operations where the failure mode is not a broken website — it is being unable to move the domain at all, for 60 days. Here are ICANN's documented denial reasons, why your DNS does not move with it, and the locking statuses that decide the whole thing.
Sep 23, 2026