I have several active implementations now (in active use for the past 2 years), I guess I could easily water some of those down into a few examples.
With regard to similar systems... Good question. Comparable solutions:
- Ruby Passenger daemon. Almost feature parity with the Enterprise version, except for the "cool robot logo".
- Python Flask framework.
- Apache with mod_php or php-fpm.
- Roxen.
With respect to procmail, yes, indeed, and I picked up its maintenance again, and released a new version recently.
are there similar systems in other languages so people can get an idea what to compare it to?
btw, welcome to hackernews.
everyone, if you didn't already recognize the nickname, BuGlessRB is famous for being the creator of procmail :-)