The Sender ID Framework is a new authentication protocol that can be used to counter spoofing by people who send unsolicited commercial e-mail messages (spam). Spoofing is the practice of forging a sender's address on e-mail messages. Spoofing misleads e-mail recipients and makes them read and respond to deceptive e-mail messages. To safeguard Internet domain names, and to help e-mail recipients identify junk e-mail messages and phishing scams more effectively, administrators can publish SPF records in the public DNS.
For more information and syntax on SPF, click here.
To configure SPF records in the Windows Server 2003 DNS, follow these steps:
|Click Start – All Programs – Administrative Tools – DNS.
|Expand DNS server then expand Forward Lookup Zones.
|Right-click the domain to which you want to add the SPF record, and click Other New Records.
|In the Select a resource record type list, click Text (TXT), and then click Create Record.
|If you add a record for the parent domain, leave the Record name box blank. If you do not add a record for the parent domain, type the single part name of the domain in the Record name box.
In the Text box, type v=spf1 mx -all. This example here allows only the MX servers to send emails for the domain.
|Click OK, and then click Done.