Thunderbird Community Forum

peter.lerche@mail.dk My internet service provider, YouSee, removed my access to Thunderbird for a couple of days - then restored it. However with the result that my laptop can receive and send emails, my PC can receive but not send, and my phone can neither receive nor send.

YouSee claims that everything looks OK from their side, and that any correction is up to Thunderbird.

Can you possibly help me?

Peter Lerche

My e-mails are sorted from earliest (top) to the latest (bottom). Suddenly about 15 messages have gone out of order. Early ones have appeared towards the bottom (later ones, have appeared under those). Is there an easy way of moving them so they are all sequential?

Thanks

Hi, when i wrote an email, and i wont to attach a file from PC, when i select the file with extension .pdf, the file did not shown in preview pane. I try everything i think, but it wont work.

I'm trying to add accounts through the hosting provider Strato, but as soon as I add a new email, it asks for my name and email address, and I can only click "Next." Then it searches and searches, and I can't cancel without forcibly closing Thunderbird. How can I change this? Why can't I do it manually? Antivirus and firewall are already disabled... it doesn't help.

new 143.0.01

Hallo,

(new information at the end)

in an effort to understand why one s/mime signed message I received could not be verified by Thunderbird (140.3.0esr (64-bit) on Ubuntu 24.04.3 LTS) (error 1041, "unknown problems with this digital signature"), but by all other clients I and others could check (including cli tools openssl, cmsutil), I did a few tests using my own certificate (using rsaEncryption, SHA256).

Inital observation: Messages signed with "openssl smime -sign -in msg.txt -to <email> -from <my-email> -subject test -signer mycert.pem -inkey mykey.pem -out signed.eml" and opened in Thunderbird showed error 1041. Any modifiers like -crlfeol, -text, -binary, ... did not make a difference.

Omitting signed attributes (-noattr) however helped. The signature was verified.

Further investigations now showed that the reason for that is a mismatch of the signing time in the signed attributes block with the RFC 5322 date in the header (or a missing date, which is the reason, the openssl smime output is rejected). If there is no match, Thunderbird shows a 1041 error (unknown problems with the signature).

However, I'm wondering whether such a test a reasonable. The standards don’t instruct MUAs to compare signingTime to the RFC 5322 Date. Flagging a mismatch is not required by spec and in my opinion adds little to no security value. The RFC date header can be easily modified and the signing time is openly readable.

Does anyone knows why it has been decided to test that?

Good morning.

Problem 1. I've been using Thunderbird for a very long time. Everything has always been fine. But recently, I've been having trouble sending email from one of my accounts. When I try to send a message, a message appears: enter the password for the user... Entering the password doesn't help, and another message appears asking me to contact the network administrator. I contacted them, but they didn't find the cause of the problem, but they suggested changing the password, which I did, and reinstalling Thunderbird, which I didn't do for fear of losing all my email. Changing the password helped for maybe two weeks, and then the problem started all over again. The problem only affects one email address and only on one computer. Sending messages from that address on Android works without any problems.

Problem 2. I installed Thunderbird on my Android phone and encountered a problem when adding two accounts: the first installed without a problem, but I can't install the second one because every time I try, I get a message that the incoming mail server check failed - unknown error 42.

Problem 3. I'm trying to install the program on my second phone - it downloads 99% from the Google Play Store and that's it.

Is there any way to solve these problems, or should I change my email program? Best regards, Andrzej Witkowski

My Thunderbird calendar refuses to display dates in European format, namely day-month-year. I have read lots of helpful hints on the forums and tried everything, but nothing changes. My system is Ubuntu 25.04 with Cinnamon 6.4.8. Thunderbird version is 140.3.0esr (64-bit). Some of the suggestions refer to settings that are no longer there compared to earlier versions. For example, Settings > General > Language and Fonts has no format options. I have also used the config editor while TB was not running and added ntl.date_time.pattern_override.date_short and ntl.date_time.pattern_override.time_short, without any effect. Dates in the calendar still always appear in the illogical American month-day-year format. This is confusing, to say the least ! Has a solution been found to EASILY select the locale and formats that should be used? At the moment, the settings are under different menus and in different locations, and TB seems to be making it as difficult as possible to get these set - permanently ! - to the user's preference.

Thunderbird being used as IMAP client for Gmail - with no issues, until recently when an existing email recipient, who sits behind the Barracuda Networks system, fails to receive mail from Thunderbird's recent versions because it is rejected and blocked by Barracuda. I have tried using plain text formats and checked that SMTP server accounts are correct all to no avail, a 550 blocked is the result. The Thunderbird ver is 143 64 bit - However mail from an earlier 32 bit version 115.5 was successfully delivered, later 32 bit ver 140 failed to deliver through the Barracuda system.

Email from Google's own Web client gets delivered and mail from the Android mobile phone app likewise arrives. A simpler IMAP client (MailSpring) manages to get mail thru Barracuda so what has Thunderbird done to appear a threat to Barracuda ? BTW Mailspring is sort of 'Ok' - but it just isn't Thunderbird - it was installed only as a test vehicle !

My (our) ISP started using new 'bigger/better' software. grrr

The ISP's tech support had me close (? delete ?) my Thunderbird e-mail account & start a new one.

I cannot access - use any of the ?17-19? folders. How do I, if I can, recover the folders so I can start moving relevant messages to them?

Good luck, remain WELL & be SAFE!

THANKS!

Robin

A disaster happened, but first, let me say that I had to create a new Thunderbird Profile because Thunderbird was acting really strange and also making my e-mails fail DKIM for some reason. After creating the new profile, things were working better, but still some problems. It's been several days. Twice it marked my own e-mails as Junk, and both times I marked them as Not Junk, but that didn't seem to "take".

An e-mail in my Drafts folder is my "in case of death" e-mail. I was editing it to change the To addresses, then told it to save as Draft. That immediate Draft went straight to the Junk folder. WTF? So I go to the Junk folder, select it, right click, and "Mark as Not Junk".

Instead of going to the Drafts folder, Thunderbird sent it. Not only that, the old Draft of the e-mail was sent also!

I'm royally pissed off! How could Thunderbird do something so stupid? First classify my own saved Draft as Junk after my having marked my own e-mails twice before as Not Junk, then send it when I said it was not Junk? This is stupid.

Needless to say, I had to hurriedly sent a retraction e-mail, then made phone calls.

Something is really wrong with Thunderbird Junk processing. After creating the new profile, I've seen junk e-mails sit in my Inbox for 15 minutes before suddenly Thunderbird decides that they are junk.

Thunderbird WAS a good program, but after having to start over with a new Profile, setting up my e-mail addresses again, install add-ins, go through all the settings again, import my e-mails, addresses, and calendars, then have things still going wrong, I'm wondering why I'm still using Thunderbird.

Most of the questions I have are either not answered at all or not answered in help or in forums and I'm unaware of any responses to questions I've asked. Isn't there any way to get support from a live person? My questions are often quite complicated. When I ask a question, I get dozens of answers that have nothing at all to do with my question and I don't have time to look thru all the answers. When I do see an answer that might be relevant, it either isn't or the answer is far too technical.

For example, I have no sent folder. Cant understand answers that tell how to create one. Need to be able to save my sent messages. Having to cc myself to get a copy of a sent message - stupid situation.

I am switching from Outlook to Thunderbird because of complicated problem with Outlook. Got garbage when imported csv contact file and can't find how to delete a large number of contacts. Reluctant to use your specific Outlook import in case it brings the Outlook problems along.

Really need help with lots of things making the transition. 'bold text'

Is there an extension or add-on that can search like the old Eudora does? The default search does not seem to search thru headers or all email messages This is important for us when we need to find the Senders IP numbers so we can ban the spam emails

My email provider calls its junk folder "Spam". Many years ago I had to set up accounts tied to this provider (IONOS) to have a Spam folder. Otherwise, account would not imap correctly to the mail server. Today I noticed that my Spam folder is not there. When I try to create a new folder, TB won't allow me to create one with the exact name "Spam," as if the folder were already there. What is going on?

I have imported my GoDaddy Emails into Thunderbird. I am able to receive emails but I am not able to send anout emails so I believer my outgoing settings must be incorrect. Can someone help me. Thanks / J

I've installed Thunderbird on new computer, and moved over from the old computer emails and Address Books (including customized ones). But when I start a new message, I can't get any e-addresses to appear in the To box.

What do I need to do to access Addresses?

My c: disk is getting full, so I decided to transfer my Thunderbird profile to d: . My old Tbird profile has profile folders for two POP accounts and two IMAP accounts. I managed to copy the profile and set up new accounts and now emails work, but in the process I disconnected the old profile on c: . When trying to create a new account on c: (so that I can access the old profile to delete old mails and get more space) I run into either "incoming server already exists" or I am asked a password which I can't find.

Any help would be highly appreciated! Should I just delete the old profile, or is there a procedure to safely remove it? Or is a Tbird reinstall in order? Thanks!

I have over 17,000 emails in my inbox and Thunderbird won't let me send any more out. I tried to cull blocks of emails (e.g., all before 2024) but it wouldn't let me do that; it made me do one at a time.

Is there no way I can delete a whole lot in one go? SW

I am looking to archive old folders from mail addresses that I don't use anymore, but don't want to delete the folders. And once those are gone- I would like the rearrange the order of the folders. This second one seems like it should be easy but I am having trouble finding how to do that. Thank you