What are SPF records?
Sender Policy Framework (SPF) is a system designed to fight SPAM emails. One of the main problems with SPAM is that messages are forged so they appear to originate from a different domain name. This is known as email spoofing.
An SPF record keeps track of the servers that are permitted to send email on behalf of your domain name. The recipeint of email from your domain can then check this SPF record to see if it has originated from an email server on your list. If the email has not come from a server on your list it can be discarded. If it has come from a server listed in your SPF record, the email will be classed as genuine. This renders your domain less susceptible to email spoofing.
For more information on the Sender Policy Framework, see the project website at: http://www.openspf.org.
