I've been pretty lazy with this.
I used to use my hotmail account, but they disabled password auth for smtp and many programs dont support 0auth2.
With that change, I just moved to using gmail. You've gotta create an App Password for smtp, but other wise works fine.
I've just been too lazy to move out of gmail+hotmail. Maybe one day

Homepage is unable to reach the host you gave it. IP/hostname changed.
Don't use the IP of the container, use its name (which you should set in paperless' compose file: 'container_name: paperless')