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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

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 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

Hi all,

I am new to a Mac (1 year now) and am trying to make Thunderbird work for me as I have not been happy with other mail clients. I am struggling through a few things.

I like to navigate by keyboard if possible. In the Calendar tab using a month or multi week view, the "[" and "]" move month by month or week by week in multi-week view. How do I move to the next day or two using the keyboard?

A big thank you to all who reply, and sorry if this question has been answered many times before (I did not find the answer in the keyboard FAQ). --Tim

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

My old calendar kept events in Reminder mode until I dismissed them. Thunderbird dismisses them too soon. Can I force it to keep displaing the reminders?

I did something one time, but it suddenly showed a whole month of reminders! That was too much. I just want to be the one who decides to dismiss. Thanks.

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.

1. Was able to receive emails sent to my address xxxxxx@xxxxxxx.free-online.co.uk, but unable to SEND my replies. Was getting this notification: 'Send message error. Sending of message failed. An error occurred while sending mail. The mail server responded: Unknown sender. Please verify that your email address is correct in your account settings and try again, OK' (see attached). 2. Checked all settings, all correct as used to be before the problem started. 3. At some stage, I tried changing the password in Settings > Privacy & Security > Passwords > Saved passwords > Saved logins to see if that helped. It didn't. 4. I removed the free-online Server from the Saved logins (Provider: smtp://relay.free-online.net, User: xxxxxxx) with the intention of restoring it with a new password - but found I couldn't restore the free-online server. So I decided the best thing to do was to restore the password as it was before and to ask for help here. >>> That line has now been restored.

NB1. Free-online is a sub section of Plusnet. NB2. Last year I received an email from Greenby saying something about maybe taking over from Plusnet and that I would be notified if and when I had to do anything. I have not received any such instructions so left things as they were. Many thanks for your help from a not-very-techy so stressed old lady.

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

After creating an email message, I click on attachment button to attach a file or pdf document to the message. The file explorer screen opens for a second then closes, giving me no opportunity to attach anything.

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.

My Thunderbird email account no longer lets me send out messages. I get a message error

  QUOTE____

Sending of message failed. An error occurred while sending mail. The mail server has responded. Message contains bare CR and is violating 822.bis section 2.3. Please check the message and try again.

But I am able to receive messages.

Can anyone help. Thanks in advance!!

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

The Inbox on my Thunderbird emails shows 224 messages but do not open. I have tried opening and deleting but to no avail.

IMPORTANTLY I am still receiving new emails.

ho appena inviato un post, replica ad una vostra risposta... purtroppo ho concluso con il button "solved the problem" ... per favore, ho giusto ri-raccontato il guaio, non è per nulla solved... non mollatemi, grazie. Giorgio Chiantore, 10015 Ivrea.

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??

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?