wiseTools
DNS
Authentication
Encoding
RFC
About
wiseTools
Useful tools for email people
DNS
Convert Names to IP addresses
Convert IP addresses to names
Find Mail servers
Authentication
Validate SPF and DKIM records
Find where a domain sends mail from
Explain a DKIM or DMARC record
Encoding
Decode encoded emails
Put images in your subject line
RFC
How the Internet works
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