There is only one name server for your domain.
Only having one (1) name server leaves you vulnerable to that name server failing and taking down your website. It is recommended to have at least two (2) name servers for your domain to provide failover capabilty/backup in the event one name server fails.
Additional Information
RFC 2182 declares that The Domain Name System requires that multiple servers exist for every delegated domain (zone).
A major reason for having multiple servers for each zone is to allow
information from the zone to be available widely and reliably to
clients throughout the Internet, that is, throughout the world, even
when one server is unavailable or unreachable.
Multiple servers also spread the name resolution load, and improve
the overall efficiency of the system by placing servers nearer to the
resolvers. Those purposes are not treated further here.
With multiple servers, usually one server will be the primary server,
and others will be secondary servers. Note that while some unusual
configurations use multiple primary servers, that can result in data
inconsistencies, and is not advisable. [RFC 2182]
DMARC is the key to improving Email Deliverability!
Email is the key to your customer communication strategy. But, what is your email reputation?
Setting up and managing your DMARC configuration is the key to getting insight into your email delivery. MxToolbox is the key to understanding DMARC.
MxToolbox Delivery Center gives you:
- Who is sending phishing email purporting to be from your domain
- What is the reputation of your domains and delegated IPs
- Where other senders are and What their reputations are
- How your SPF, DKIM and DMARC setup is performing
- What on-going maintenance you need to maintain and improve your email deliverability
Learn More