Changelog for previous release (Thunderbird 2.0.0.19) | Changelogs for other Thunderbird releases
Released on 18 Mar 09, and this changelog was last updated on 19 Mar 09.
Mozilla Thunderbird 2.0.0.21 has been released. Release notes are available. This post lists the improvements in Thunderbird 2.0.0.21 over 2.0.0.19. This list encompasses almost every single known fix that went into this release. Do check out the known issues as well.
The Gecko 1.8.1.x branch (Thunderbird 2.0.0.x series) will not include any groundbreaking features that Gecko 1.9.x will bring, since it is based on Gecko 1.8.
Impact key for security issues listed on the Mozilla Foundation Security Advisories webpage:
- Critical: Vulnerability can be used to run attacker code and install software, requiring no user interaction beyond normal browsing.
- High: Vulnerability can be used to gather sensitive data from sites in other windows or inject data or code into those sites, requiring no more than normal browsing actions.
- Moderate: Vulnerabilities that would otherwise be High or Critical except they only work in uncommon non-default configurations or require the user to perform complicated and/or unlikely steps.
- Low: Minor security vulnerabilities such as Denial of Service attacks, minor data leaks, or spoofs. (Undetectable spoofs of SSL indicia would have “High” impact because those are generally used to steal sensitive data intended for other sites.)
Changes in 2.0.0.21: (6)
Security issues: (3)
- Fixed: MFSA 2009-07 – Crashes with evidence of memory corruption (rv:1.9.0.7) (Critical)
- Fixed: MFSA 2009-10 – Upgrade PNG library to fix memory safety hazards (Critical)
- Fixed: MFSA 2009-09 – XML data theft via RDFXMLDataSource and cross-domain redirect (Moderate)
Other fixes: (3)

The Rumbling Edge :: Thunderbird Release Changelogs | 18-Mar-09 at 12:33 am | Permalink
[...] What’s new in Thunderbird 2.0.0.21 … (Not yet released) [...]
Kevin Day | 19-Mar-09 at 4:16 pm | Permalink
drag and drop of email messages into folders appears to be broken in this release. Proceed with caution
Don peterson | 20-Mar-09 at 7:21 am | Permalink
Thanks so much for a great product. I would use nothing else!
B. Scott Williams | 24-Mar-09 at 12:55 am | Permalink
I like Thunderbird as an email client. Currently, I use the add-on Spamato and it has issues. Almost all of my mail shows up in spamato. I have filters but spamato appears to take presidence. This is problematic but Spamato does find most spam in my incoming mail. Is there a fix so that filters will work in conjunction with the spamato add-on instead of competing with it.
Now a suggestion. I would like to see some new features.
1- Improved editor/mail document processor.
2-Saving the email being forwarded as attached as some known formats such as .html, .wpd, .doc, .txt, .rtf, .pdb, .pdf, .odt, .xml, .stw, .sxw, .xml, .stw, .sxw, .z, .zip, .docx, .dot, .frm (corel WP), .lab (corel WP), .ods, .ots, .ott, .sql, .sxc, .sxd, .wb1, .wb2, .wb3, .wpt, .xls, .xlsx, .xsl, .tar, .gz, etc.
3-Ability to open saved MS outlook mail
4-Ability to open MS outlook mail folders
5- ability to import Seamonkey mail
LeRoy | 25-Mar-09 at 7:31 pm | Permalink
Twice I have had my inbox in Thunderbird just disappear never to return. I am half afraid to mess with this new update unless it would fix this problem? So I think I will hold off for now.I like a lot of things about TB but a few things I dislike.
Iago | 27-Mar-09 at 7:45 pm | Permalink
Lighting has stopped working with this ‘upgrade’. calendars have disappear and cannot even create new ones
Bland Lipscomb | 29-Mar-09 at 12:16 am | Permalink
I cannot configure Thunderbird to work with the following:
IMAP
incoming: mail.toast.net
outgoing: smtp.toast.net
errow message smtp is rejected
Bland Lipscomb | 29-Mar-09 at 12:16 am | Permalink
I cannot configure Thunderbird to work with the following:
IMAP
incoming: mail.toast.net
outgoing: smtp.toast.net
error message smtp is rejected
James Hirs | 01-Apr-09 at 6:38 am | Permalink
Love Thunderbird, but the inability to open .pps and .xls files automatically on Mac OS X is a deal breaker. Will try again when this is fixed
Lois | 01-Apr-09 at 12:27 pm | Permalink
I have installed the latest thunderbird update twice and each time had to do a system restore as it has some conflict with my CA firewall.
When it is installed I cannot send any mail unless I disable the firewall. I’ve given up, but sure wish the update had an option to let Mozilla know of the problem.
Sylvia Haertle | 01-Apr-09 at 6:39 pm | Permalink
after having installed latest version of Thunderbird , the emails of the previous account have not been imported, the incoming mails are not in the inbox and I get the notice “connection to server pop.gmail.com timed out”
Please help a beginner!!!
Sylvia Haertle | 01-Apr-09 at 6:41 pm | Permalink
“Connection to server pop.gmail.com timed out” . What can I do? Thanks a lot. SH
Dayse Galhardo | 16-Apr-09 at 6:11 am | Permalink
The option on Configuration Account->Edit and Adress->Insert an sign: is disable, so I can’t change this option. I use version 2.0.0.21
Sueric | 30-May-09 at 1:34 pm | Permalink
Having a problem when trying to BCC from address book – keeps going back to TO, won’t keep BCCing. Anyone….????
Nadia Kerr | 02-Jun-09 at 8:31 am | Permalink
Still having problems on Mac OS X 10.5.6.
While in the middle or writing emails (new or replying) the program freezes. Can’t use program until it resumes from hanging/freeze state.
This appears to be a common problem as many have mentioned it on online discussions and forums, but still not fixed. Why is that?
Once I find an alternative program I will delete this one. Constant freezing in the middle of writing emails is just plain annoying and time wasting.
Not happy Thunderbird Developers!
Giulio | 23-Jun-09 at 4:10 pm | Permalink
What’s new in 2.0.0.22 ?
The Rumbling Edge :: Thunderbird 2.0.0.22 Released | 23-Jun-09 at 10:09 pm | Permalink
[...] Changelog for previous release (Thunderbird 2.0.0.21) | Changelogs for other Thunderbird releases [...]
Eva Wegrzyn | 24-Jun-09 at 5:18 am | Permalink
Hi everybody,
since the latest update I cannot send a file from another program (MS Word via File, send as – mail as attachment) directly. Microsoft says: Error: Contact “Microsoft exchange”. What went wrong? Please help -
Thanks a lot!!
Raniero | 24-Jun-09 at 1:13 pm | Permalink
I strogly believe that TB is the best email client of the world, and I’m waiting realese n.3.0: what about it? How long shold I waiting for?
thanks
Eraly Gaspard | 30-Jun-09 at 3:30 am | Permalink
During the last update the following has apparently happened.
Windows XP rejects Thunderbird as the standard e-mailprogram.
I can no langer send a file in Adobe Acrobat an send a link of a page from IE 8.
XP says that there is no standard e-mail account and that i must set MS Outlook as the standard e-mail program what we do not want !!!
Molly | 01-Jul-09 at 5:36 pm | Permalink
I have the same problem as Eva W. above. Since the last upgrade I can’t send a file from another programme either (for example MS Word via File, send as – mail as attachment). Please help as I use this feature a lot!
Thunderbird 2.0.0.21 corrige fallos de seguridad | Actualidad, Descargas, Internet, Software y paquetería | Espacio Linux – Portal y comunidad GNU/Linux en español | 14-Jul-09 at 8:20 am | Permalink
[...] corregir cuatro fallos de seguridad, de los cuales tres son críticos. Así también se corrigen tres fallos de funcionamiento en el programa, que a pesar de que no son de trascendencia, si son parte del mantenimiento de la [...]
Dean Drinkwater | 17-Jul-09 at 9:52 am | Permalink
since 2.0.0.22 CA firewall keeps blocking TB. If I turn the fire wall off it works. I have deleted TB from the list and re-granted access. I have set TB up manually. Some times it works for a day but then starts blocking it again. I have been running both TB and CA together for years. I am starting to see other with this problem. Any help?
Marcia Fanta | 20-Jul-09 at 1:25 am | Permalink
Cannot install updates. Have trouble getting into thunderbird when I try…..Update notice keeps popping up which is annoying since it will not let me install.