Today, I will describe a very easy way to create SPF record on your server. This is a very important setting if you are sending mass emails through your server.
First of all, let me describe what SPF means. SPF is an acronym for Sender Policy Framework. Briefly, SPF fights return-path address forgery. With SPF, you identify your mail server in DNS. In this way, SMTP receivers verify the sender address against this information and eliminate messages from forgeries.
For more information about SPF, please check the following pages:
http://old.openspf.org/howworks.html
Setting up SPF on your server is not a difficult task to achieve. You only need to create SPF setting line and insert it into your DNS server. In the follow address, you will find a very useful wizard which will create the SPF setting line for you. It also describes how to insert this auto-generated SPF setting line into your DNS configuration.
http://old.openspf.org/wizard.html
Enjoy!