Thunderbird (e-mail client thread). Addons, discussion, help.

Ok, thunderbird is not for everyone. Thunderbird was not made to be like MS Outlook. Thunderbird exists, because a lot of people didn't want to use Outlook. It was designed to have less features to be more lightweight and less cluttered.

Remember, Thunderbird removes email from POP account after download by default. To leave messages, go to Accounts-Server settings (for each account)-Check "Leave messages"
1) Links
Read more on wiki
Thunderbird support forum. http://forums.mozillazine.org/viewforum.php?f=39 Or you can post in this thread.
Currents stable release. Thunderbird 2. Download.
Current beta release. Thundebird 3b3. Stable enough for me to use. No problems yet. Download
Thunderbird addons.

2) Addons I find useful
Nightly Tester Tools Need this to install some addons.
Lightning. Calendar addon. https://addons.mozilla.org/en-US/thunderbird/addon/2313
Lightning for Beta versions http://weblogs.mozillazine.org/calendar/2009/06/nightly_builds_now_available_f.html
Lightning Nightly Updater (Unofficial) https://addons.mozilla.org/en-US/thunderbird/addon/4623
Auto Address Cleaner https://addons.mozilla.org/en-US/thunderbird/addon/7148
CompactHeader https://addons.mozilla.org/en-US/thunderbird/addon/13564
Custom Buttons² https://addons.mozilla.org/en-US/thunderbird/addon/5066
Display Mail User Agent https://addons.mozilla.org/en-US/thunderbird/addon/562
EMail Address Crawler https://addons.mozilla.org/en-US/thunderbird/addon/9995
Enigmail https://addons.mozilla.org/en-US/thunderbird/addon/71
Hide Menubar https://addons.mozilla.org/en-US/thunderbird/addon/4762
Mail Tweak http://mailtweak.mozdev.org/tweaks.html
MinimizeToTray revived https://addons.mozilla.org/en-US/thunderbird/addon/12581
MR Tech Toolkit https://addons.mozilla.org/en-US/thunderbird/addon/421 This will really expand Options menu. May be anoying.
QuickFolders (Folder Tabs) https://addons.mozilla.org/en-US/thunderbird/addon/3254
Remove Duplicate Messages (Alternate) https://addons.mozilla.org/en-US/thunderbird/addon/4654
Signature Switch https://addons.mozilla.org/en-US/thunderbird/addon/611
SmoothWheel https://addons.mozilla.org/en-US/thunderbird/addon/357
Toolbar Buttons https://addons.mozilla.org/en-US/thunderbird/addon/2377
Zindus https://addons.mozilla.org/en-US/thunderbird/addon/6095 Sync gmail adressbook.

3) Competition
Outlook http://office.microsoft.com/en-us/outlook/default.aspx
You know it. Paid.
Live mail http://download.live.com/wlmail Sucessor of Outlook express.
Free.
The bat. http://ritlabs.com/en/Very
Paid. Powerfull client. But no calendar.
Eudora http://www.eudora.com/
Free/paid.
Postbox http://www.postbox-inc.com/
A paid client, based on Mozilla Thunderbird. By former Mozilla employees. Read more here. http://forums.mozillazine.org/viewtopic.php?f=34&t=1085655
Zimbra. http://www.zimbra.com/
Free/paid. Main competitor for Outlook. Has server exchange, a bunch of other stuff.