In January 2021, there were approximately 349 million domains worldwide. Behind these domain names are usually multiple services, such as the website, the customer server or mail server. In order not to lose track of which server is responsible for which domain and which service, addressing is required.
Although every device connected to the Internet is assigned a so-called unique IP address, these are quite complex and long alphanumeric sequences that are impossible to remember.
DNS simplifies addressing, knows the services and associated IP addresses attached to a domain name, and automatically assigns requests. For example, when a domain is called, it is possible to address the server that provides the content of the web page.
All this information is stored in DNS records, or the zone file. When a browser calls your domain, the DNS in the associated record then retrieves and addresses the associated IP address to display the content.
For a more precise classification of the records, there are different types. Here is a list of the common DNS records:
Contains the IP address of a domain, usually for calling the web page.
Forwards a domain or sub-domain to another domain, but does not provide an IP address.
Forwards emails to an email server.
Allows the administrator to save text notes in the DNS zone.
Stores the name server for a DNS zone.
Stores administrator information about a domain.
Specifies a port for certain services.
Provides a domain name in reverse lookups.
Specifies which hosts/IPs are authorized to send emails via the domain. Deprecated type, which is now kept as TXT record with the same content. This record can be generated here.
Gives instructions for emails that cannot be delivered due to lack of authorization. This record can be generated here.
In order for EuropeanMX to protect your domains from spam and viruses, emails to your domain must first be filtered through the EuropeanMX servers. For this, you change the MX records of your domain and enter the actual target servers in your account.
With our tool for MX analysis you can check if these settings are done correctly.
But our tool can do much more. The analysis also shows you whether your domain is listed on one of the common block lists. This would mean that messages to recipients whose mail servers retrieve these lists will not be delivered and will be considered as spam.
Contact us if your domain is listed on a blocklist!
Furthermore, our tool shows which other technologies are already in use. For example, the analysis tool checks whether an SPF record exists, TLS is supported and where the reverse DNS is located. Also the connection time and transaction time can be evaluated, should you have the fear that the mail server does not react in the usual time frame.
Finally, the evaluation of the analysis shows you detailed information about the responsible MX records / servers.
Many companies end up on a block list over time due to unintentional spam sending. An infected workstation or a hacked company server may already be enough for this. Often, this is only noticed as soon as the first customers complain about undelivered messages.
To prevent blacklisting effectively, we therefore recommend to install outbound spam filters as well. EuropeanMX offers you reliable outbound filtering and reduces the risk of ending up on a blocklist to almost zero.
the security of your emails is important to you, you have more questions about your MX records, you are unsure how to interpret the evaluation or you want to take a closer look at our spam filter EuropeanMX.
We are happy to answer all your questions.
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