It doesnt seem like most businesses using Google Apps actually do this. Is there anything I should know before doing this? Any reason NOT to do this?
http://www.techrepublic.com/blog/google-in-the-enterprise/send-better-email-configure-spf-and-dkim-for-google-apps/
Absolutely enable it! I know the folks at Sheepdog do this as standard operating procedure for all client domains
