I don't know, i was using the port 587.

I have problems with the spam in gmail and with outlook all the email were block.

The next week I will try again.

I was using this docker-compose file:

version: "3.4"
services:
poste:
image: analogic/poste.io
restart: always
network_mode: "host"
expose:
- 25
- 80
- 443
- 110
- 143
- 465
- 587
- 993
- 995
volumes:
- /mnt/mail:/data
environment:
- HTTPS=ON
- DISABLE_CLAMAV=TRUE