For kde/plasma users, if you don't mind about kmail/kdepim/kontact/akonadi stuff, you can do it with a lot of patience and reading, 1 hour work. I let that kmail stuff go because i use thunderbird on my test system and on my working laptop claws as mail Client since years. But if you need the akonadi-services than be a little more careful, their will be the leftovers.