:: Domain Name Guide::
Why Need A Domain
Choosing Domain Name
Choosing Registrar
Registration Requirements
Domain Name System
DNS - A Record
DNS - Name Server
DNS - CNAME Record
DNS - MX Record
DNS - TXT Record
DNS - SPF Rcord
DNS - SOA Parameters
DNS - Domainkeys
Country Domains
Domain Name System (DNS)
Sender Policy Framework (SPF)
Sender Policy Framework is an extension to the Simple Mail Transfer Protocol (SMTP). SPF allows software to identify and reject forged addresses in the SMTP MAIL FROM (Return-Path), a typical nuisance in e-mail spam. SPF allows the owner of a domain to specify their mail sending policy, e.g. which mail servers they use to send mail from their domain. The technology requires two sides to work in tandem -- the domain owner publishes this information in an TXT Record in the domain's DNS zone, and when someone else's mail server receives a message claiming to come from that domain, then
- the receiving server can check whether the message complies with the domain's stated policy. If, for example, the message comes from an unknown server, it can be considered a fake.