Reputation is everything, but when you need to setup a new server on a new blacklist-checked IP for (non-spammy) mass mailing, without SPF and DKIM your emails

Reputation is everything, but when you need to setup a new server on a new blacklist-checked IP for (non-spammy) mass mailing, without SPF and DKIM your emails will most likely go to the Spam folder, in 2015. Of course, those things are not guaranteeing delivery, but they play an important role.