An SPF-record specifies the hosts (e-mail servers) which are permitted to send e-mails from a domain name.

This is used to prevent spam and phising. For details please see http://www.openspf.org

 

Simple DNS Plus also has an option to automatically provide missing SPF records - see Options dialog / DNS / Automatic SPF section.

 

To create a new SPF-record, right-click a zone in the left list in the DNS Records window, and select "New SPF-record" from the pop-up menu.

 

This record type is defined in RFC4408.