Search on it depends on your IMAP server's search system (I know Mailcow uses solr but that takes a while on my server, probably because of underspec hardware). Tags are easy to work with, the interface is quite good in my opinion, and integration with calendar/contact sync is also quite nice. The front end for basic Sieve rules works well for my requirements. Gravatar support and desktop notification support are also nice bonuses.
There aren't too many themes for it, though, so you'll have to make your own if you don't like the look. There's a SoGo demo on their website if you're interested.
It's so interesting: when Gmail first came out, tags were so innovative. So much better than folders. I spent the first couple years tagging all my mail, and setting up filters.
Now I never think of it. If I want an email, I search. Having hundreds of thousands of old emails means tags would have long-since been overwhelmed.
Is this other people's experience? Or am I bad for not doing inbox-zero and carefully curated tags?
If you know what thread you're looking for, search is good enough. If you communicate with distinct groups of people about different projects, search is good enough. If emails from the same few people can concern different projects, and there are no terms that always appear in those message to differentiate (or your colleagues are bad at using the subject line), tagging your messages with the proper project/issue/topic goes a long way.
This means that any tag applied by a filter is usually pretty useless, you can just repeat the filter's query when needed.
Looks like they're not really aiming at the DIY crowd though, I wonder if it's tricky to set up.
The features mention:
> Save the parameters of a search so that you can quickly access them later from the menu without having to enter them again. This is particularly useful for parameters of searches that are used frequently. Saved search parameters can also be deleted later.
Not that an open source project owes you anything, of course.
Is roundcube better now?