With “marketing setup” do you mean you want to use the email summary itself as a marketing tool, to send emails containing ads/marketing info? If so, that’s not what the email summary is for and Discourse is not intended to be used this way. You’d want to use some other newsletter or marketing platform geared towards engaging with people in their email.
(Or turn on mailing list mode, so your members get an email for every post and can post to your forum by replying to the emails. But again, Discourse is not intended to be used this way. It’s better to get your community in the habit of logging in and participating on the site.)
You’re not providing alot of information in this topic about your needs and reasons, so the rest of us are just making guesses at how to help you..
Incidentally, I still find the email summary to be interesting and worth receiving, as community manager here. I recently created a test account that I don’t use to log in every day and a byproduct of that has been that I get the email summary.
Having a test account is useful as community manager because you can see Discourse as your regular members see it, and I recommend it.