[nosianu]

> It is pity, that Google Mail is «good enough» and it killed development of good desktop e-mail clients.

Microsoft Outlook has a very large market share in the business world. There is an old and a new GUI design version, and you can run the app, or use it online.

I don't like the presentation of the individual emails especially, I find the thread-view hard to understand, especially on mobile, but it works. Personally, I would have preferred the older folder presentation designs of 20+ years ago, for me this app is trying to be too clever - in both the old and the new GUI version. However, it is just so very widespread. I have to use it because everybody else in the company uses it.

They support a huge amount of scenarios and edge cases that many businesses now depend on, combined with all the Microsoft server side and infrastructure stuff they have of which the emails are just a very small part now.

[blacklion]

Outlook is more groupware client, than e-mail. Also, to-quoting only (AFAIK, it is THE place where top-quoting was invented).

Also, when I was forced to use it (to be honest, about 10 years ago) it works terrible with IMAP (as opposite to Exchange) servers.