Hi @rhence,
There isn’t a specific setting, no. By authenticating your email, you did the groundwork and from here on, it’s consistency and email sending according to best practices.
I’ve answered a similar thread before here: Why are my marketing emails going to spam in HubSpot? - #2 by karstenkoehler
Generally, it’s become a lot harder in recent years to get your email into the primary inbox of recipients. Email service providers are stricter, recipients are less forgiving.
If you’re already sending emails according to the best practices from my earlier post and from the resource that @chighsmith linked, then unfortunately, there isn’t a quick fix.
Lastly, you could consider turning off tracking for marketing emails to see if you’re emails have better deliverability: HubSpot Login and Sign in - you’ll lose insight into open and click rates however. Worth a test though, I would say.
Best regards!