For me, there's only one reason I would use Evolution instead of Thunderbird:
- Evolution can use Outlook Exchange accounts (like the one I have to use in the office).
- It is only for Linux systems.
- Insufficient edition possibilities when composing messages (no lists, no embedded images, ...)
- Simple filters didn't worked for me.
- Evolution can't be deinstalled from Ubuntu, because it is somehow linked to several applications, so uninstalling Evolution forces you to uninstall applications like Nautilus.
This reminds me on IExplorer on Windows.
Tips & Tricks
By default, Evolution comes only with your systems language.
If you need more languages for spell checking, you have to install the corresponding aspell packages, for example:
sudo apt-get install aspell-de
Restart Evolution, and select the new languages for spell checking.