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If you use Mandrill to send your emails you'll want to do this too. http://help.mandrill.com/entries/21751322-What-are-SPF-and-DKIM-and-do-I-need-to-set-them-u

• StavrosK 13y ago
  You pretty much have to set the SPF field regardless of where you host your email. I don't know if Mandrill signs DKIM and give you a key to add.
  • dangrossman 13y ago
    > I don't know if Mandrill signs DKIM and give you a key to add. They do.