SPF wizards
Here are some sites that can help you generate SPF records. http://www.mtgsy.net/dns/spfwizard.php http://spfwizard.com/ http://www.spfwizard.net/
Sender Policy Framework
SPF Record Syntax Note: This page serves as an introduction and quick overview of SPF
Hoe werkt het SPF record in de DNS
Hoe werkt het SPF record in de DNS Geplaatst door Web-Oke Support aan 19 januari