Mail service in local GitLab docker container

I’ve created a local GitLab server for managmenting code versions with my local network (with my team). I would like to have a mail service for notifying changes to my team, but I don’t understand it.

This is my container:

f3a2c26319dc gitlab/gitlab-ce:latest “/assets/wrapper” 2 months ago Up 2 minutes (healthy) 80/tcp,>22/tcp,>7842/tcp, 443/tcp gitlab

My ip is, so for accessing to GitLab:

Is it possible to obtain a mail service in local network?