thoughtbot/griddler — pull request #132 by ygnessin (2014-04-19 00:54:44+00:00)
Title: Extract Envelope, DKIM, SPF, Spam Score, and Spam Report in SG Adapter

These fields are useful for the following reasons:
- Envelope: Only way to get the recipient email address in the case of a BCC
- DKIM, SPF: Useful sender verification metrics from SendGrid
- spam_score, spam_report: Useful spam metrics from SendGrid

Thanks for reviewing!