Thank you so much for your suggestion!
I discussed it with the IT of my univeristy, but in the end they decided to add a "Spoof intra-org" exception that could only work when the emails are sent from "s2survey.net" from my email address. My understanding is that adding the SMTP data to the project was not possible because there is a Multi-Factor Authentication in place.
They also asked me if I could provide the DKIM record to complete the setup correctly.
Thank you very much for your help