Will my email go down?

Only if someone edits MX. We keep MX/TXT untouched unless the ticket is mail. Website cutover is A/AAAA/CNAME/NS.

How long does DNS take?

TTL plus registrar NS. We lower TTL first when we can. Cloudflare proxy can hide origin swaps in minutes.

DNS Cutover Same Day Without a Mystery Outage

Nameservers, apex A/AAAA, www CNAME, and health checks. We cut traffic when the origin is actually ready — not when the slide says go-live.

Cutover is operations, not a redesign

The new site can be perfect and still 404 if NS still point at the old account. We inventory every record before we flip.

Apex and www

Apex cannot CNAME on many DNS. We use A/AAAA or flattened CNAME and a www record that matches. Mixed www vs apex without redirects splits SEO and cookies.

Health before the flip

Origin 200 on the real host header. TLS SAN includes the public name. Then NS. Not the other way around.

We run the checklist

Registrar, old NS, new NS, TTL, MX left alone, post-flip curl from more than your office Wi-Fi.

Questions

Will my email go down?: Only if someone edits MX. We keep MX/TXT untouched unless the ticket is mail. Website cutover is A/AAAA/CNAME/NS.
How long does DNS take?: TTL plus registrar NS. We lower TTL first when we can. Cloudflare proxy can hide origin swaps in minutes.