SIMPLE SYSTEMS / E-MAIL TOOLS
SPF lookup
Read the published SPF policy and inspect its mechanisms. Use the SPF analyser to expand includes and redirects.
Find the servers that receive e-mail for a domain.Try
Queries use Google Public DNS. Cached answers can reflect propagation delays. SPF and DMARC checks inspect published records; they do not replace a complete mail-delivery assessment. Subdomain DMARC results check the organizational domain when needed.