A domain name, DNS, email and website hosting are often sold as one product, but technically and legally they are different components. Especially when something goes wrong, it matters which party manages which part.
A website can move without changing the domain registrant. Mail may be with a different provider from the website. DNS may be managed somewhere else again. That provides flexibility, but only when access, registration details and documentation are clear.
The registrar arranges registration of the domain name with the relevant registry. DNS translates names into technical destinations and includes records for the website and email, among other things. Hosting is the environment in which website files or applications run.
One provider can supply all three, but they are still different functions. When there is a problem, first establish which function is actually failing.
The actual rights holder: the person or organisation to whom the domain name belongs. A technical administrator may make changes on behalf of that rights holder, but that does not automatically make the administrator the owner.
Independence and technical continuity explains how ASK-Solutions deals with this when, after recovery, someone wants limited technical administration to continue.
Because email depends on DNS records other than the web address alone. Anyone who replaces a nameserver or an entire zone and restores only the A or AAAA record for the website can lose MX, SPF, DKIM or other records.
Make an inventory of the existing zone first and determine which records have a function before changing nameservers or DNS provider.
No. Hosting may refer only to the technical environment. Updates, content, domain registration, mail, backups and recovery may be with the same or different parties. Record which responsibility sits where.
Anyone who wants to learn how to investigate this in practice can also look at Digital within The Owl’s Nest.