qmail was once a great piece of software. Then it stopped being maintained, and it lived in a licensing no-man's land for quite a while that effectively preven

qmail was once a great piece of software. Then it stopped being maintained, and it lived in a licensing no-man's land for quite a while that effectively prevented new maintainers and viable forks from existing. It's no longer current technology and fails to comply with RFC changes that have happened since it was released, including but not limited to 6522, which standardizes bounce messages. It still does very well at the job it was originally designed to do, but it's no longer a modern, usable tool. It doesn't belong in the modern email toolbox any longer.