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Our tools make it simple to check domain DNS settings, verify SPF records, and identify if the domain's mail servers are listed in any RBL/DNSBL blacklists. Choose the check you want, enter the domain, and the tool will do the necessary DNS queries and check their results.
A DNS analyzer is a tool that checks domain DNS settings and verifies important DNS records to make sure they are configured correctly. For example, it checks A, AAAA, MX, TXT, NS, and SOA records. It also compares the settings of authoritative DNS servers with the domain delegation in the parent zone. The check also includes making sure that DNS delegation, glue records, and SOA serial number match between authoritative nameservers. If you want to know more about how DNS works, you can also visit our DNS page.
The check also makes sure that the specified domain isn't blocked by the Protective DNS system at joindns4.eu. If the domain is blocked, a warning will appear in the check results.
The SPF Analyzer checks the SPF record of a domain and its individual mechanisms. It checks if the domain has exactly one valid SPF record and looks at mechanisms such as include, redirect, a, mx, ip4, ip6, exists or all. The check also monitors the number of DNS lookups, void lookups, and cycles in the include and redirect chain. This helps you find problems in the SPF configuration that could cause emails not to be delivered.
A RBL/blacklist tester checks if the IP addresses used to receive emails for a specific domain are on DNS blacklists (RBL/DNSBL). First, it looks for the MX records of the domain and gets the IP addresses of the mail servers from them. If the domain doesn't have an MX record or the IP address can't be found in the MX record, the A record of the domain is used as a backup. Then, the IPv4 addresses that were obtained are compared with the available RBL/DNSBL lists. The result will help you decide if the IP address of the mail server can be listed on one of the blacklists that are being used.
Enter the domain you want to check, choose the tool you want to use, and start the check. The result is a summary of the DNS records found and any problems or warnings in the domain configuration.
