Example image of eyePlorer eyePlorer map for 'Sender Policy Framework': E-mail spam E-mail spoofing Validation Domain name Host (network) List of DNS record types Message transfer agent E-mail E-mail address Simple Mail Transfer Protocol Domain Name System DNSBL Bounce message Client (computing) Server (computing) Backscatter (e-mail) Bounce address MX record Reputation system Sender Rewriting Scheme Whitelist Uniform Resource Locator Internet standard DomainKeys Identified Mail Internet Engineering Task Force Paul Vixie Meng Weng Wong MARID Sender ID Internet Engineering Steering Group Request for Comments Steven M. Bellovin Internet Assigned Numbers Authority Mail submission agent Virtual private network Anti-Spam SMTP Proxy SpamAssassin Courier Mail Server Exim Microsoft Exchange Postfix (software) Qmail Sendmail Wildcat! BBS MAAWG Author Domain Signing Practices Pobox Boxbe Vouch by Reference MDaemon Email Server for Windows