The strangest thing.. And I'm pretty sure that the solution is fairly simple.. I'm trying to install DKIM and SPF for one of my domain hosted on a dedicated server with cPanel WHM.. I'm following this tutorial (http://techinterplay.com/enabled-dkim-cpanel-server.html) but the DKIM test is unsuccessful.. Since I host the email for this domain name at Google Apps, I make the DKIM test from a simple php code by using the php mail() function What's causing the failure of the DKIM? Thanks for your help!!