The scope isn't revolutionary - I've used https://mailu.io/ for years for a few 10s of users, and I really like it. I've heard similar good stories from Mailcow users.
On a quick skim I couldn't tell what was new relative to these older compose-based solutions but (as co-author of similar solution 10-15 years ago) I'm interested to know!
On a quick skim I couldn't tell what was new relative to these older compose-based solutions but (as co-author of similar solution 10-15 years ago) I'm interested to know!