Using classic Outlook for Windows in business environments
I will probably go for Mozilla Thunderbird.
It's been around for a long, long time. I actually tested it out in the early days and was not very impressed. However, recently I had a similar issue with my "older" Apple products, namely Mac computers bought approx 10 years ago. So, as we all know Apple stop you from updating the OS as they see appropriate. This also prevents you from updating the bundled Mail app, and I discovered that it turned out that perfectly usable computers were rendered almost useless. Looking for alternatives, I tried out Thunderbird and I have to say I like it. I have it installed on Mac computers and Linux boxes now, it works quite well. So I will probably go for it on Windows as well when M$ go through with this stupid **** forcing this bloatware app down our throats.