The current buzz in the e-mail industry, is around Domain-based Message Authentication, Reporting & Conformance, commonly referred to as: DMARC. DMARC pulls together SPF and DKIM, into a method to try to stop spam and keep people from abusing your brand/domain. One of the added benefits of DMARC, is that receivers are able to report back to the domain owner, the disposition of messages being sent into their environment. Gmail is currently one of the few receivers providing these reports back, but hopefully adoption will be growing soon.

After parsing your DMARC results, you will need an easy way to review the results. I've put together a VERY basic PHP script that can be used for display DMARC report results.