DNS Tools

The DNS tools let you inspect, test and generate email authentication records for any domain. Use the tool menu at the top of each tool to move between them.

In this section

• DNS Domain Analysis — Analyse the DMARC, SPF, DKIM, TLS-RPT, MTA-STS and BIMI setup of any domain.
• DNS Lookup — Look up DNS, DMARC, MTA-STS and TLS-RPT records for any domain.
• SPF Lookup — Look up and explain the SPF record of any domain.
• DKIM Lookup — Look up the DKIM records published for a domain and selector.
• SPF Policy Test — Check whether a sender IP address is authorized by a domain's SPF record.
• CIDR Calculator — Calculate CIDR notation, subnet masks and IP address ranges.
• DKIM Generator — Generate a DKIM key pair and the DNS record to publish.