Thunderbird Community Forum

I would kindly ask for adding support for PGP/inline for Thunderbird on desktop. I am aware that there is a valid argument against PGP/inline and a workaround for using it regardless [1]. However, there are also some use cases, which apparently led to it being implemented for Android [2]. My use case are PGP/inline signatures for (unencrypted) newsgroup posts. In this context, the advantages of MIME are less pronounced and some disadvantages show. PGP is less supported by newsreaders, which in the worst case leads to illegible messages in the case of MIME. In some groups, multipart messages are prohibited by the charter. Similarly, for discussion based groups, attachments are seldom (or prohibited) and messages often monolithic, thus ensuring integrity even with PGP/inline. Also, privacy (unencrypted metadata) is not really a concern on a public message board. While PGP/MIME is a good default, newsgroups are an example where it would be desirable to have an option to switch to PGP/inline on a message-by-message basis or even as an account default. There are already PGP specific options in both, the account settings and the message settings. Extending that by another checkbox seems like a good solution to me.

[1] https://support.mozilla.org/en-US/questions/1446050 [2] https://github.com/thunderbird/thunderbird-android/issues/1974

Hello, I only use Thunderbird on my PC with IMAP. For the past three days, while I receive my emails just fine, I can no longer send them. They bounce back with the following error message:

The only thing I've done is also install Thunderbird on my mobile phone. It asked me for a password that I don't know and don't think I've ever had one for Thunderbird.

However, when I go directly to the Free Zimbra website associated with my email, it works and I can send my emails. Thank you for your help.

Christian - Error message attached.

I am really in a panic: Using ubuntu 22.04 and Thunderbird 140.7.1.esr For my main account I keep some 40 sub-folders and sub-sub-folders. All but the most recent mails in my sub folders are gone, something like 4 years of email. I asked chatGPT for help and found inside the /mail folder that most of the files with the names of my sub folders with no extension have 0 kb. I don't use IMAPS because I wanted my mails on my computer so I use only POP. :-( The interesting thing is that this only happend to my main account. I have 6 more accounts in Thunderbird and they seem to be fine, at least for now. Thank you for any help. Kind regards Frank

Hello, can someone please fix this e-mail address please & thank you.

Following the instructions provided at this web page: https://developer.mozilla.org/en-US/docs/MDN/Community/Community_Participation_Guidelines I e-mailed a code of conduct violation report to the provided email address, mdn-cpg-report@mozilla.com

Actual results:

I immediately received the following e-mail reply, telling me in effect that my e-mail could not be delivered:

Subject: Delivery Status Notification (Failure) Date: Sun, 15 Feb 2026 21:34:30 -0800 (PST) From: Mail Delivery Subsystem <mailer-daemon@googlemail.com> To: [redacted]

Hello [redacted],

We're writing to let you know that the group you tried to contact (mdn-cpg-report) may not exist, or you may not have permission to post messages to the group. A few more details on why you weren't able to post:

You might have spelled or formatted the group name incorrectly. The owner of the group may have removed this group. You may need to join the group before receiving permission to post. This group may not be open to posting. If you have questions related to this or any other Google Group, visit the Help Center at https://support.google.com/a/mozilla.com/bin/topic.py?topic=25838.

Thanks,

mozilla.com admins

[headers, etc redacted]

Expected results:

I expected instead to receive a reply telling me that my e-mail had been successfully received.

Dear all,

I would like to use Thunderbird on a shared computer at my universitys lab space (it is mainly my PC but other people have access and use it sometimes). However, as we are requested to keep mails confidential I thought it would be as easy as just setting a primary password and thunderbird would not start if that password is not set. However, that proofed to be a wrong assumption. Instead if I just cancel the dialog it will open and still display all the locally stored mails.

We are using IMAP server and I already set up that the mails are not stored locally. Still, some mails that I have used recently are visible. I am aware that there would anyway be the local copy in the profile folder but I guess none of the people sharing that computer would take the efford to check that, so I would be fine if I could simply prevent thunderbird from starting without the primary password.

Is there any option for that or any extention that would do so?

Thank you in advance! Juergen

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.

 %PDF-1.7

%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

When I send a message, it actually is sent, however the windows showing send progress continues on for some time, after which I need to click on cancel to close this window. At first I did not think the mail was being sent, however after replies on them were being received, and when sending an email from one of my email addresses to another, I get the windows message that the email was received. Why isn't the process window closing when the message was actually sent??

The month at a glance format was great. This new format(s) Feels like you fixed something that was not broken. I liked the old format. How can I get back to it?

I’m trying to filter Calendar events by Category and then sort the results by Start Date. Currently, I can use the “Search All Events” feature to display events and sort them by Category, but I’m unable to apply multiple sorting criteria or filter the results to show only a specific Category before sorting by another field.

Is there a way to first filter events by a specific Category and then sort those results by Start Date? What would be the correct approach to achieve this?

I use Linux Cinnamon Mint on two Dell desktops - they are set up identically and perform in the same way with one exception. Both appear to be the same version of Thunderbird and have identical settings but on one computer the appearance of the typeface (in for example a listing of emails) is less clear /sharp than on the other.

When I say they are the same version - they both say 140.7.1esr (64-bit) but after that on one computer it says "Thunderbird for Linux Mint -mint-001 - 1.0". This qualification appears on the computer where the typeface is less clear but not on the other.

I should add that the issue seems to relate solely to Thunderbird - it does not present when looking at (say) websites on Firefox.

Being of a certain age clarity is important and I just wonder if I am missing something? Thanks for any help.

Hi!

I've added some subfolders to my inbox on my laptop but these folders dont appear or sync on my phone, I've checked all settings and they seem to be in order. Can you point me in the right direction to fix this?

Cheers,

Henk

В первой половине дня не отправляются письма в thunderbird, во второй начинает работать. Проблема появилась 3 недели назад, причем по всем филиалам с разных IP адресов. При этом напрямую из браузера письма отправляются. P.S. в thunderbird входящие приходят. В чем может быть проблема? Во вложении скрины

Every 2 or 3 days, Thunderbird tells me it needs to be updated. I run the update but halfway through it stops and tells me that I have a newer version on my PC. Why can it not recognise that I am up to date?

I was sending an email with an attachment I wanted to check the attachment before I sent it. But I chose windows media player and it won't work I went to remove media player but I couldn't open my attachments, so I put the attachments back on but I still can't open my attachment. What do I do so I can Read my attachments again Thank you Richard

I am using Thunderbird 115.18.0 and Windows 7 professional (no snarky comments please).

All has been working fine for years, but in the last few days, strange thing have been happening:

In the pane with all of my email accounts, the ">" icon to the left of the first account has been disappearing. This meant I could not look at any folders, including Inbox, Drafts, Sent etc and handmade folders. Cured by closing and opening Thunderbird.

I now have two Archive folders, one called Archive, the other Archives. Both empty, neither can be deleted.

Periodically, when the ">" is present, selecting it (to "V"), the list of folders SLOWLY appears, one folder at a time.

Periodically, the bottom of the Thunderbird window, shows a 'downloading' message, of hundreds of files. Several GB of data has been downloaded over a couple of days.

Opening the Inbox folder, the pane with subject, correspondents, date etc has changed the sort order.

Sometimes, all of the emails in this pane have had their font underlined.

Nothing on my system has intentionally changed,

Any ideas what has gone wrong, and how to put things right would be appreciated.

Thanks,

I am setting up Thunderbird on a Win10 machine, and am having a lot of trouble adding accounts that I did not have on the two Win11 machines I have set the same accounts up on.

When adding my 2 GMail accounts, after clicking "Allow" on the OAuth popup the button would go grey the window would stay open and not close, and the account would not be added.

Changing the general.useragent.compatMode.firefox option to TRUE allowed me to progress and finally add those accounts.

I am now having the same trouble with my @hotmail.com account. When I add the account, the dark blue OAuth window pops up, but is completely empty, and there is nothing more I can do.

Things I have tried

• Reverting the above config change
• Checking that cookies and JavaScript are enabled
• Checking there is no saved password
• Used both the Account Hub and the default dialog, with the same effect.

Thanks in advance!

Is the feature supposed to behave this way? I find this rather tedious. Am I missing something here?

Current behavior:

My installation does not seem to automatically execute spam filtering for unified folders or saved searches. As soon as I manually select one of the included folders within - e.g. an individual mail acccount's inbox - the algorithm triggers and everything works as expected, but only for the one folder I clicked. This leaves me with having to click through all my mail accounts manually to make use of the adaptive junk mail controls function.

Expected behavior:

Selecting a unified folder triggers junk mail controls for all the included folders and moves messages to the respective junk folders automatically.