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]
Your Email Deliverability is in Jeopardy!
Blacklisting is a sign that you are not actively managing your email deliverability. Other technologies - SPF, DKIM and DMARC are now just as important to get your email placed in the Inbox of your recipients. If you aren’t managing email deliverability, your message may never be heard.
MxToolbox Delivery Center Features:
- Insight into your SPF, DKIM and DMARC configuration to ensure your sending email properly
- DMARC Compliance checks for all of your reported email
- Adaptive Blacklist Monitoring of all your email senders
- Recommendations for improving DMARC compliance and DMARC policies
- Event-based reminders for emergent issues and on-going maintenance
DMARC is a necessity for your business!
Learn More about Email Delivery