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DNS Open Recursive Name Server

What you see when your domain has this problem
Open Recursive Name Server Detected Details area Ignore
Monitor, detect and fix real world problems with your SPF and DKIM configuration

More Information About Dns Open Recursive Name Server

We found at least one "Open Recursive Name Server" which is capable to respond to any DNS lookup from any IP. This means that your DNS server will provide a DNS "Answer" for any domain if it is asked. This is a serious security vulnerability as it allows your system to be used for a DNS Amplification attack where someone will spoof an IP address and ask your DNS server for an answer. This could cause your DNS server to be slow or crash from the requests. It also causes your DNS server to send a DNS Response packet to the spoofed IP address. Since this packet is larger and the attacker is likely sending a lot of these, they have effectively used your system to DDOS the spoofed IP.

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

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