Domain name - is sequence of labels from the root domain node to the root of the tree.
Schematically it looks like this:
Schema displayed on the picture shows an example of how the domain name should be read. In this case we have the root node support, then there is a node soft-industry, the com node completes the root of the site domain name. This is the way in which domain names should
DNS (Domain Name System) - is a computerized distributed database which stores information about domains. Domain Name System is one of the fundamental components of the Internet and it is needed to convert IP addresses to domain names and vise versa.
To understand necessity of DNS we need to look in to entrails of history. As you know, maybe someone not, the Internet appeared as network established by the Ministry of Defense in 1969. It was called as ARPAnet. So, in the early development
One of the primary objectives of any Network Operations Center (NOC) should be to reduce downtime. This would include obvious actions such as immediately responding to an IT Enterprise function that failed instead of waiting until the failure became visible to Users. It would also include watching for problem symptoms and reporting/correcting them before they turn in to outages. Because a professionally run NOC has extensive monitoring tools that provide deep visibility into the equipment,
What to do if you mail server was blacklisted?
If, despite all the above, you find yourself on a blacklist, here's what to do. First, take a deep breath
Everything will be OK.
Than you need to check your mail server IP to be really blocked or not. To do it in most productive way you may use this links:
Very well known RBL, well recommended.
Direct UBE sources, verified spam
What RBL is?
RBL stands for Realtime Blackhole List, this is a term for DNS based systems designed to assist in the prevention of email abuse. The first such system was created by Mail Abuse Prevention System (MAPS) LLC who have been granted a Service Mark for the term. The generic name for wsuch services is DNSBL.
The DNSBL consists of a DNS based system containing lists of IP addresses whose owners refuse to stop the proliferation of spam whether this be by running their