Hi there, our team is looking to implement Einstein Send Time Optimization for a client who also uses Return Path to track deliverability. However, in order to use this functionality we need to use the STO functionality the email campaign has to be sent as part of a journey and the Return Path box that we typically check (to gather data) for our sends isn't present. 

The other issue we're running into is that using this functionality won't allow us to export the click activity PDF that we always generate to see what content is resonating with subscribers. Have you had any other clients successfully implement STO? If so, we'd love to hear how they handled this.