@BYK completely agree with you, yet what is confusing for me is that since Sentry docker does not supports by default nginx, maybe was making a bad decision on the image I added, or the setup for properly linking this nginx docker image to smtp docker image provided along side sentry is the issue. I would like to see someone in community sharing a better docker-compose.yml that contains the right nginx proxy for the sentry to run. Or else it seems already so much waste of hrs to debug this issues, with nginx it should work, yet then is not recommended to run it without nginx.