Curious if anyone here (possibly besides parent) who is running this in production? I thought it looked like the best option for a custom configurable stack (an

Curious if anyone here (possibly besides parent) who is running this in production? I thought it looked like the best option for a custom configurable stack (and keeping it up-to-date with security fixes), but there are so many moving parts in a full e-mail stack. Any experiences good or bad?