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Hello, I've just downloaded and started to use Mozilla Thunderbird on my Windows 11 desktop, and have encountered a strange problem. Whenever I compose a new email - it contains a lot of gibberish that looks a bit like a mixture of HTML coding and binary. I've tried changing the format of new emails between HTML and Plain Text and nothing seems to overcome this issue.

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%µµµµ 1 0 obj <</Type/Catalog/Pages 2 0 R/Lang(en) /StructTreeRoot 11 0 R/MarkInfo<</Marked true>>/Metadata 24 0 R/ViewerPreferences 25 0 R>> endobj 2 0 obj <</Type/Pages/Count 1/Kids[ 3 0 R] >> endobj ..... á)S«++Ü>_æcåZ[aCyبµå]$úÌÎñvö¤ãÜ.;[P?°6ø?êæT‡Õ:TêP+;:¶„?p_E¸ïº?\?rc¸¿¿¢2?ð£±ñÓŽ<€‡õÙv¿·ãk†Îû÷z¬§.ê1dÛ¿fBŠ!?™&äKÍÐ7ô?ãóùD_Îé ²?H„Û§VSÚË?¸#,X?¨ +µ"ç?™ã?‰œv™s¤z­ß'–ª²6ú½ºÙ?n_àÍëÙ×¾³ñ|oXÍ©]Pß,¸®±Ã_QAó6£:?¬€?ÖEÇZÙYX€òuµ?Ä"1 S«Ã?þÖp²??€Ã+Ö`Ñôj­J´Z8¹<Ìj룵Â?•?¢_ÞÊŽÚ ê hË?µz??Ôý~g‘×½c?+b5¢?á”r,JNeGuCSØSënÀþlòV»}á` ¦¯Æ_ÝX#VÉo?÷}?óiOÔjalÇ•–…ÅȍÙ&oµâVkÄjÁá­Â‡Ôpdر\ZR¬è¨áÞjîf²?ž?-!Ô1í ¡f—?Yª¨Z>Æí«ñ‘ýH—ÜÑ>é³Ã¦?mÙá8Ò'zÎ?vJ‹?õõV6Vôèà1ê£?Œ¶ö·û©ˆ¹ˆ>?5Lb9ÇÈ,5?'?>?Íh.±Š.o˜MñVû?ý5~ì¡à”j161×ÚúŽŸî??uVµ¶ÚÑ]2ã˜?å—P*Ì|È– ¥?{°*à–˪¥Gké#É1Çe•Ù~ѯŽŽ†N¦f‹­ìîäšÐ—ŸS?ž?¨ñ‡??ü>Ñϼþ&fõͨ-ÇY­B¸óWÕù½voUG]Wwû‚ŽÎ`°£µ²¶y(ÎE‡lC‡zõp·ÖùiÕ?Üëij?Ùx>~Æ(4¥°Q~~ÖÔΠ?kú¬ê]vƼgͨŽ(\)¯?UÓ™…¼ê]^Æ‚šW?^á? ¯Hˆ–¦!aÒÊ»w??k×rušCK×wq¦ùLÒÇY}—B>;=(G{P?·“ú.?å?ei?|&òµSéÜhi?rì"g7SÄ}Kd’u21ÁA³>h Æ?­J¼‚)?®?<»Q6Ž³?V?ÏݝhsšæîâíqA÷.­¥iÑ’í()|íG|è¹(Ö£!<??::‚Ьê?V†öµO”?%?»ÐÕŒ=„÷I¥·Aì¿õ5Í?µ5"z°?ìU|ó0÷`aÅ??=6XÃf㨰Å?JøË„¿Œü?á7bçó?ŽÅ?A·£Ö@Œ?SÍܜΚ*šôvuwϨö=çÞ_ãÃYš?̪?Ç?ðrÓgC¹Ñ?µp?·×׉~°Pµ¨kÌ?[_ƒs)?D‘±á8´??m?%ª´:⼡R=öZ_“p#t´×„k?â¡Õ‹j´ój?³1þ¡aC?µ©Ï??*¨éHô?Ô‚?κ9{‹ 8ôM¯&?I<¬†&ÉhEÏëýȪ¯õÒ?™Ž³L/?³›<ˆùºœF fw4“‰a©Ù–xs8.? ..... trailer <</Size 27/Root 1 0 R/Info 10 0 R/ID[<8A940EF8C93B1F468E504337B8F1ED8B><8A940EF8C93B1F468E504337B8F1ED8B>] /Prev 38146/XRefStm 37845>> startxref 38843 %%EOF </p>

Regards,

 Martin
 martin@baughan.org.uk

Wayne Mery asked me 4 questions. The answers are l. No, the 224 message number is blank. 2. Nothing to click on. 3. Starting in troubleshoot mode did not help.4. My version number show at Help is 147.0.1. (64-bit) currently on the release update channel

I have Thunderbird checking a Gmail email account but also another, non corporate email account. On my iMac desktop computer, I have the email client putting all "Incoming" email into a single inbox. Is that possible to do on Thunderbird? Or, do I have to go to the specific email inbox of each email account that I am checking with Thunderbird?

My computer suddenly started the above error message for multiple programs. The local computer shop was able to sort out what appeared to be the root cause and that recovered some things but I still needed to reinstall a number of programs.

The program I am terrified of reinstalling is Thunderbird. All my emails on five email accounts since 2011 are stored in TB and I naturally do not want to lose any of them.

The major problems are the computer is running Win7 Enterprise and I am 82 years old so I am prone to needing things spelt out in greater detail than many others.

Can anyone provide a way to reset the program permissions (preferable) or identify the best way to reinstall and still access all my historic emails?

Thank you

When i minimize, it starts "eating" ram the computer crashed when it consumed 59GB of ram.. suspect memory leak.. One solution is turning it off after checked for mail...But i kinda want it minimized so i don't have to check by starting it every now and then..

I am running Windows 10 22H2, Thunderbird 140.7.1esr.

I cannot display some emails that are found when I make a search for a specific word and partially displayed. Therefore I understand they are still there.

However, when I request a list of these emails, none is found. Same thing if I try to fully edit them. I understand the index is somewhat damaged. How do I fix that ?

Thunderbird has turned into a scam. Each time I try to download it for windows it takes me back to the donation page. I am on my third donation but it never trys to install.

As the image attachment shows, the 2024 Local Folders item has a different icon and is not in order with the other years. I'm running 147.0.1 on a Windows 11 system. Selecting Reset Folder Order had no effect. Is there a way to better integrate the 2024 local folder with the other years?

Hallo, ich habe seit 2 Wochen Probleme mit der Authentifizierung meines Mailaccounds von AOL. Alles was ich Versuche funktioniert nicht. Ich bekomme jedesmal im eingeblendeten AOL Autentifizierungs Fenster die Meldung "etwas ist schiefgelaufen. Ich habe in meinem AOL Account schon mehrerer Male ein App Passwort für Thunderbird erstellt. Habe dieses App Passwort Thunderbird genannt. Konto ist ein SMTP IMAP Konto, die Ports stimmen auch. Ich habe mein AOL Mailkonto mittlerweile in Thunderbird komplett gelöscht und ebenfalls die AOL Passwörter gelöscht. Die Authentifizierungsmethode für outh2 ist angewählt und Cookies sind eingeschaltet.

Ich kann machen was ich will. Die Autentifizierung funktioniert nicht.

Woran kann das noch liegen. Ich bin mittlerweile ratlos.

Frank

I have a local folder which has 90 folders within it. These are folders brought over from Eudora (the mail system I used before Thunderbird). It would help me if I could easily move all 90 from their current "Eudora" folder to the big "main" folder that Thunderbird has. To make it clear what I'm asking, here's an example, using two folders, Danbury and Fritz.

D (folders whose names begin with D) Eudora folder, which has two folders - Danbury and Fritz F (folders whose names begin with F)

Is there any way to move the 2 folders that are currently within the "Eudora" folder so that they're "first level" folders. In other words, Danbury would be among the "D" folders and Fritz would be among the "F" folders.

The only way I know to achieve this is by manually creating the new folders, moving the items from the old folder to the new folder, and then deleting the old folder. This is cumbersome.

Hello! It seems Thunderbird emails are suddenly being 'threaded'. It is causing great confusion in my office.

I need to see each email from a person separately in order to find them easily and also to reply to each one at the time it is received.

Can someone please explain in very simple non-techy jargon:- a) How I 'unthread' messages already threaded AND b) How I stop any new ones being threaded in the first place.

Thank you Tylex

Sync with my gmail account is over a day now and still a long way to go. grabs 20 or so emails at a time and then just sits there. All my folders are gone as well. They are there in gmail but not TB.

Running Thunderbird 140.6.0esr in Windows 11. This afternoon I found that one of my three accounts no longer shows up in the folder pane, though it still appears normally in the account settings tab. I can still send mail from it, but can't receive any. The other two accounts appear in the folder pane as usual and can send and receive normally.

Any help getting the account back into the folder pane would be appreciated. -- tralfaz

Starting Feb 8, 2026 my yahoo accounts no longer work in Thunderbird. I have accessed these for over a dozen years using Thunderbird. In addition, when I open Thunderbird at all I end up getting endless loops of yahoo login messages. The mechanisms in the messages do not work at all. I have received no Yahoo mail since that date. To troubleshoot the issue I tried logging into the accounts directly through Yahoo. Broken, with no access at all to any help resource from Yahoo. Although Yahoo seems to be keeping mum on the problems, there is spotty information online that Yahoo servers were breached a few days ago. One report claimed that user data for about a billion accounts was compromised. I suppose that may explain why my accounts no longer work anywhere- neither from Yahoo itself nor within Thunderbird. Is there a way to disable the incapacitating yahoo popups pending any larger solution to this?

I have been using ThunderBird on Linux Mint for some time now. I am using Outlook.com for emails, calendar and contacts and I sync with another laptop and mobile phone. All fine until a few days ago when I noticed calendar events were not syncing with my phone. I found one calendar event in ThunderBird had an error when I manually synced with TbSync. The error report did not say anything specific. I deleted this calendar event and TbSync ran successfully uploading 2 events that it had not uploaded due to the calendar sync error. I then wanted to manually recreate this calendar event in ThunderBird. When I clicked on "New Event", the Calendar New Event pop-up window did not appear. When I minimised the ThunderBird window, the New Events was not behind it. The ThunderBird icon pinned to the panel had a "2" in the corner. When I hovered over the ThunderBird icon in the panel, it showed both the ThunderBird window and New Event window preview. When I selected the New Event preview window in the panel, it still did not become visible. All I could do with with New Event preview window in the panel was click in the 'X' to close it. I checked for Lightning Calendar Tab add-on updates. It was up to date. I check the settings. All OK. I disabled and enabled this add-on. Still not working. My Windows habits made me shutdown and restart my device. Still Not working. When I checked the other ThunderBird functions, New Event pop-up windows appeared for Emails and Contacts but not Tasks which had the same symptoms as the Calendar.