獲得2005年度郵件軟體大獎的1.5.0.2 正式版於日前釋出，也是Mozilla推出的產品，和Firefox都屬於開源軟體陣營，推薦給需要一套好郵件軟體，又不想用微軟OutlookExpress或Outlook的人使用。最棒的是，它像Firefox一樣，還有很多擴充套件或外掛套件可以用，豐富了更多個人需要的功能或工具，這是其它郵件軟體遠所不及的，而且在官網都找得到最新擴充套件檔案。
有興趣的可點選Thunderbird 1.5.0.2英文版下載，或Thunderbird 1.5.0.2繁體中文版，很奇怪的是官方正式版只放了簡體中文的版本，我這邊列出的是最接近正式版的繁體中文候選版，不知道為甚麼官方沒放上去，下載這個版本回來用也是很穩定並不受影響。它主要的特點有：
軟體能自動更新到新版本，其擴充也可以自動更新。
可依據自己寄信給每一位使用者的頻率排序郵件。
更好的自動拼字檢查。
能夠跨越不同郵件帳號進行搜尋。
內建的釣魚詐騙郵件過濾系統，以及內建的廣告信過濾系統（還可以和伺服器的廣告過濾系統整合），幫助使用者對抗騙徒和廣告信。
支援Podcast與RSS。
能夠不刪除郵件本文而刪除附件夾檔。
可透過郵件過濾原則進行回信和轉寄。
提供Kerberos認證系統。
郵件進行編輯時，可自動存成草稿。
支援SMTP伺服器管理。
1.5.0.2更新的內容有：
* 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 1.5.0.2: (77)
Security issues: (15)
* Fixed: 319858 – JavaScript execution in mail when forwarding in-line (Critical)
* Fixed: 325991, 328469 – Privilege escalation through Print Preview (Critical)
* Fixed: 282105, 315254, 320459, 326615, 326834, 327941, 328509 – Crashes with evidence of memory corruption (rv:1.8.0.2) (Moderate)
* Fixed: 316885, 322045 – JavaScript garbage-collection hazards (Moderate)
* Fixed: 317934 – Changing postion:relative to static corrupts memory (Moderate)
* Fixed: 319296 – Memory corruption via QueryInterface on Location, Navigator objects (Moderate)
* Fixed: 319847 – Localstore.rdf XML injection through XULDocument.persist() (Moderate)
* Fixed: 319872, 322215 – Integer overflows in E4X, SVG, and Canvas (Moderate)
* Fixed: 323501 – Security check of js_ValueToFunctionObject() can be circumvented (Moderate)
* Fixed: 325403, ZDI-06-010 – CSS Letter-Spacing Heap Overflow Vulnerability (Moderate)
* Fixed: 327126 – Privilege escalation using crypto.generateCRMFRequest (Moderate)
* Fixed: 328937, ZDI-06-011 – Table Rebuilding Code Execution Vulnerability (Moderate)
* Fixed: 320375 – Read beyond buffer while parsing XML (Low)
* Fixed: 322312 – "AnyName" entrainment and access control hazard20459 (Low)
* Fixed: 328917 – Mail Multiple Information Disclosure (Low)
Crashes: (8)
* Fixed: 306067 – null pointer dereference crash
* Fixed: 317420 – Firefox 1.5RC3 crashes when trying to print a page
* Fixed: 319210 – crash [@ plc4.dll + (00001ae2)] on mail send (using SSL connection to SMTP)
* Fixed: 321495 – Thunderbird 1.5rc1 and 1.5rc2 hangs with 945 messages in a POP account
* Fixed: 323131 – crash after saving all attachments [@ nsMessenger::SaveAllAttachments]
* Fixed: 328187 – crash at IMAP login with GSSAPI authentication using SSPI library
* Fixed: 322273 – Crash at [@ nsMsgQuickSearchDBView::ListIdsInThread]
* Fixed: 322283 – Crash after filter operation with a missing destination folder
Build configuration: (6)
* Fixed: 307311 – Allow client.mk to build xulrunner + multiple apps in one sweep
* Fixed: 316177 – command-line options for "-compose" broken
* Fixed: 316674 – compare-locales should support reasonable numbers of ordered search
* Fixed: 321791 – mailViews.dat should be in mail.xpi
* Fixed: 323997 – TARGET_XPCOM_ABI not set in AIX builds
* Fixed: 329047 – 1.5.0.2 nightlies ABI incompabilities with 1.5
Functionality: (9)
* Fixed: 180849 – Mail loss in import of NC4 mail when 0x5C() is used as 2nd byte of muti-byte character in folder name.
* Fixed: 307052 – Spellchecker doesn't display suggestion list for misspelled words if Russian Spell dictionary is installed
* Fixed: 307527 – Connection timeout with IMAP on dual core systems
* Fixed: 315625 – When forwarding a message inline, Thunderbird strips inline-images
* Fixed: 316812 – When address book name is Japanese character, address book is lost when new address book is created
* Fixed: 317009 – Thunderbird incorrectly decodes =00 in quoted-printable attachments as 0x20, not NULL
* Fixed: 323318 – When the attachment file name is separated, should append semi-colon(';')
* Fixed: 323608 – ldap schema's use of displayName has changed since Thunderbird 1.0x
* Fixed: 326280 – Suppression of append-domain autocompletion not working
RSS: (4)
* Fixed: 312008 – RSS feeds stop loading after connection errors
* Fixed: 315600 – Hangs while validating feed (rdf)
* Fixed: 320818 – broken parsing on CDATA sections
* Fixed: 320967 – 'content:encoded' field ignored in RSS2 feed parsing
Toolkit: (9)
* Fixed: 298960 – -remote can no longer handle commas or quotes
* Fixed: 302099 – How do embedders embed libxul?
* Fixed: 315434 – Security error with remote <xul:tabbox>: can't switch tabs if chrome has focus
* Fixed: 317568 – Stub executable opens console window
* Fixed: 319410 – textbox element loses content upon resize with direction:rtl and flex
* Fixed: 320449 – Make properties of GRE_GetGREPathWithProperties useful
* Fixed: 322354 – libxul always links against X11
* Fixed: 326772 – compatibility.ini should include TARGET_OS_ABI
* Fixed: 328505 – [Linux-only] –install-app fails on Linux for packages without a vendor
UI improvements: (6)
* Fixed: 183394 – sometimes when you delete a message, the focus gets lost instead of going to the next message
* Fixed: 184811 – addressingwidget appears as sunken, not as button
* Fixed: 299343 – Can't copy and paste into the beginning of a line
* Fixed: 315057 – Display – Fonts tab: The pull-down menu of Character Encodings doesn't work.
* Fixed: 320185 – It's impossible to delete or detach attachment via File Menu
* Fixed: 326846 – read mail not marked as read
Miscellaneous fixes: (4)
* Fixed: 320117 – Syntax Error in chrome://editor/content/EdInsertTOC.js
* Fixed: 322172 – bump copyright year to 2006
* Fixed: 322994 – Remove palm related files in the installer
* Fixed: 326128 – Thunderbird 1.5.0.2 – Update build and branch values
Mac-specific: (4)
* Fixed: 308294 – Thunderbird tinderbox (bg l10n) fails in "$(ZIP) -r9D $(LANGPACK_FILE) install.rdf chrome chrome.manifest"
* Fixed: 309210 – makexpi.pl only looks for *.so when stripping
* Fixed: 325410 – Mac builds not packaging .chk files
* Fixed: 327108 – Cannot save copies to Sent folder. Selections in Copies & Folders are not retained(IMAP)
Intel Mac-related: (9)
* Fixed: 302212 – Mac OS X x86 builds can't target SDKs
* Fixed: 322578 – Support ppc<->x86 cross builds for Mac OS X
* Fixed: 324855 – Need a script to produce universal binary .app from cpu-specific bits
* Fixed: 327823 – Support configurable preflight/postflight actions in client.mk
* Fixed: 327848 – Drive the Mac universal build process entirely in-tree
* Fixed: 328081 – Support unification of bdate for multi-project builds
* Fixed: 328391 – .mar generation should package universal build when the build is universal
* Fixed: 328596 – Difficult to "Open using Rosetta" due to self-relaunching
* Fixed: 330890 – unify does not preserve the execute bit
Sun-specific: (2)
* Fixed: 312154 – Start script does not take care of running instance
* Fixed: 314018 – Error in configure(.in): Sun CXX (CC) compiler defiens __SUNPRO_CC and not __SUNPRO_C
AIX-specific: (1)
* Fixed: 323997 – TARGET_XPCOM_ABI not set in AIX builds
