[mjl-]

There is some more information about spam filtering at the features page:

https://www.xmox.nl/features/#hdr-junk-filtering

I'm very happy with how the filtering works for me. Most email gets classified because of being a known sender. The first-time senders will go through the bayesian classifier, which keeps most spam out. For me, 1 spam message gets through every 2 days. If ham is incorrectly rejected as spam, the sender will hear about it, because mox will keep soft-rejecting the email, eventually resulting in a bounce.

> I assume that the web service can be fully disabled and Mox can be run with no httpd but that is also not specifically called out ... can it ?

You can run without the web interfaces. I think you can set it up without a public web server, but the admin interfaces are pretty convenient (though still spartan!), you could keep those internal. The webserver is needed for ACME, for MTA-STS, and for autoconfig. Btw, mox can also serve static files and do reverse proxying. The mox website is hosted by mox. I added webserver functionality (relatively tiny functionality/code compared with the email code!) so people wouldn't have to run another webserver, which greatly complicates the setup (with reverse proxying).