We apologize, but this tool is temporarily unavailable.
While we address some issues with the tool, we suggest using other tools such as the SPF Record Check and the DMARC Check Tool from MXTOOLBOX.
Tool to validate if SPF and DMARC records have been “published” in a domain’s DNS zone file. The tool will query the DNS of the respective domains and present the records found. Up to 500 domains may be entered.