Thunderbird 6.0

Thunderbird is a great email client from the same people who brought you the Firefox browser.

Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.

  • Tabbed email
  • An Archive feature similar to the one in GMail
  • Lightning fast search
  • Smart folders


  • More responsive and faster to start up and use
  • Thunderbird is based on the new Mozilla Gecko 5 engine
  • New Add-ons Manager
  • Revised account creation wizard to improve email setup
  • New Troubleshooting Information page
  • Tabs can now be reordered and dragged to different windows
  • Attachment sizes now displayed along with attachments
  • Plugins can now be loaded in RSS feeds by default
  • There are several theme fixes for Windows Vista and Windows 7
  • Support for Mac 32/64 bit Universal builds (Thunderbird no longer supports PowerPC on Mac)
  • Over 390 platform fixes that improve speed, performance, stability and security

Download: Thunderbird 6.0 | 13.7 MB (Freeware)
Download: Mirror @ Brothersoft
View: Release Notes | Thunderbird Website

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It's interesting how Thunderbird has evolved.

For a while they were looking to integrate Sunbird (Calander) project in to Thunderbird, but now exists as a Thunderbird plugin called "Lightning"

Eudora deicded to open source there client and gave it to Mozilla... which has released one version ( and appears to be Eurdora's interface w/ Thunderbird 3x code behind it.

Jack Musick said,
Can someone explain to my why Thunderbird can't connect to Exchange via OWA like an iPhone or Android device?

Because iPhone and Android devices don't use OWA, they use ActiveSync and ActiveSync must be licensed for mobiles.

Default Windows 7 theme is indeed horrible, but when forcing it to use XP Theme, it's pretty nice.
All you have to do is edit nonlocalized.manifest file from omni.jar and change all 6's to 7.
Actually you don't even have to use omni.jar - just extract all the files to Program Files/Thunderbird directory and edit the manifest file as i did.

Hm... I really don't see much difference (And some of the changelog at least seems to be from version 5...).

One thing that seems interesting is that it looks like Personas is now built right in, which is a definite plus.

roadwarrior said,
Hmmm, just curious, but why are the Afrikaans and Bulgarian (and a few other languages) versions stuck at 3.1.12??

That does seem odd...

roadwarrior said,
Hmmm, just curious, but why are the Afrikaans and Bulgarian (and a few other languages) versions stuck at 3.1.12??

Looks to me that those languages are not maintained anymore. Perhaps lack of contributions/active volunteering maintainer?

Amen, brother... Hideous may be more appropriate.
I've switched back t0 3.x on Windows 7 (no problem - just uninstall 6 and install 3.x)
On Fedora I'm running 6, but the theme didn't change.
Perhaps someone can explain the whole "aero3Default" thing to us.

Tony. said,
Holy ****, Thunderbird 6 is ugly.