Go library and tools for DKIM, DMARC and Authentication-Results (library)

 go-msgauth
 .
 Go library and tools to authenticate e-mails:
 .
  * Create and verify DKIM signatures
    (https://tools.ietf.org/html/rfc6376)
  * Create and parse Authentication-Results header fields
    (https://tools.ietf.org/html/rfc7601)
  * Fetch DMARC (http://tools.ietf.org/html/rfc7489) records