[jjav]

> basic stuff like email rules

I mean gmail has the most limited frustrating filtering (lack thereof) rules of any email system I've used. Any self-hosted solution will be infinitely better.

> Gmail special like labels

How is that special?

Also, gmail spam filtering is not very good. You know how every business has that "check your spam folder" bit? Because gmail is so terrible about it. It is easy to do much better with a self-hosted solution, put an end to the false positives of gmail.

Seems that you like gmail, but in my experience it's one of the worst mainstream email implementations ever. Doing better is a trivial bar.