[ducttape45]

Still waiting for software like LibreOffice to come out with an email client like Outlook. So far, no one has come close.

[The Duke]

It might be worth checking out the Opera email client. Last time I used it, it made more use of tags than it did folders to organize emails. which I consider a big plus.

It also had great filtering / auto-tagging features.

[lgjhn23]

“...Still waiting for software like LibreOffice to come out with an email client like Outlook. So far, no one has come close....”
I just use Thunderbird by Mozilla. It’s the closest thing I could find to Outlook. It’s certainly easier to add accounts to it compared to Outlook and it’s served my needs quite well ( 4 different email accounts on it) over the past 4 years since Microsoft decided to quit “dating” me.
It may behoove ya to maybe check it out and give it a try.