Adding SPF (Sender Policy Framework) support for Exim version 4.75
To learn more about SPF, visit http://www.openspf.org
Before implement SPF in your Exim mail system, compile and install Exim with libspf2 library. Google will help you :-)
You can now run SPF checks in incoming SMTP by using the "spf" ACL condition in either the MAIL, RCPT or DATA ACLs. When using it in the RCPT ACL, you can make the checks dependend on the RCPT address (or domain), so you can check SPF records only for certain target domains. This gives you the possibility to opt-out certain customers that do not want their mail to be subject to SPF checking.
Tags:Perl Net::DNS library can be used to write powerful web or OS system applications involving DNS lookups and queries. In this tutorial I will show you how to write a DNS diagnostic application involving DNS and resolver.
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