Comment Re:Join the mailing list (Score 1) 15
Kolab supports multi-domain, in fact even ASP multi-tenancy, environments. And seamless updates and upgrades are part of the enterprise values it provides under support. But naturally one needs to know what they are doing. This is a complex micro-service architecture that is more powerful than virtually any of the competitors. But that power comes at the cost of loads of opportunities to shoot yourself in the foot.
I think is simultaneously the best thing and the second biggest issue[1] about Kolab - it's a very powerful piece of software targeted at sysadmins. You can setup some very complex, enterprise grade configurations with it, but to do that you need to be willing to muck around with postfix, etc. By that same note, you need to have at least basic familiarity with postfix, apache, cyrus, etc. to actually set it up in the first place, which sets the bar fairly high. (I think it took me a week of practicing in a VM before I was ready to do a proper deployment on my home server.)
[1] The biggest issue would be its general bugginess. e.g. This bug affects anyone with an apostrophe in their name, but went untouched for over a year, despite a patch being included in the original submission.