Email moved from GSuite to Dreamhost but not working

I have recently migrated from GSuite (+ hosting) to Dreamhost. I transferred the hosting from GSuite and stopped email as well. My webmail on Dreamhost is however not reachable (404 error) while for another website I host on Dreamhost it is working properly. I am guessing there is a setting in G-Suite I need to turn off but I have no idea what that might be. Anybody had a similar issue?