&gt; <i>It&#x27;s the best anti-Outlook as far as I know.</i><p>I don&#x27;t know about Windows, but on Linux... I try every so often to use other clients, but Thunderbird is still the only one I can bear.<p>For some reason there&#x27;s always something that doesn&#x27;t work with Gnome or KDE clients, keystore stuff that doesn&#x27;t let me save my passwords, or seems to but doesn&#x27;t actually remember them, or some indexation service insisting on taking half my CPU, or...<p>And the desktop-agnostic clients are ugly and lack features.<p>So through all this time, I&#x27;ve both hated Thunderbird and considered it the only usable client. I really wonder which one I&#x27;ll switch to in the future.