About Docker, you may want to do some research on it, because it may not be 
desirable for production systems due to its monolithic design, it uses a single 
Docker daemon, while competitors like podman use a daemonless architecture.

Look how "easy" it is to secure Docker:
https://cheatsheetseries.owasp.org/cheatsheets/Docker_Security_Cheat_Sheet.html





On Thu, 23 Nov 2023 19:01:56 +1300 DL Neil via Postfix-users 
<postfix-users@postfix.org> wrote:

> New to me was Docker Mailserver. This appears to be more cut-down, but 
> also gives (me) the impression that main.cf and master.cf are either 
> hidden-away or totally-inaccessible. Nr1 difference is 'no RDBMS', which 
> I guess I could live-with (am quite at-home with SQL and such) and don't 
> need it for (eg) the web-site side of things, so...
> 
> Do you have experience using this package?
> (is it sufficiently "Postfix" to be suitable conversation on this list?)
> 
> -- 
> Regards =dn
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