Thunderbird Community Forum

Thunderbird Version 140.7.1esr, Build ID 20260123195141 User Agent Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 OS Linux 6.1.0-33-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.133-1 (2025-04-10) OS Theme Xfce / Adwaita Application Binary /usr/lib/thunderbird/thunderbird-bin

Having a problem with an ATT POP account. TB stopped getting mail. After a minute and a half or so (wish it would time-out faster), I get a pop-up box in the top right of the screen that states: "Connection to server inbound.att.net timed out" and then quickly goes away.

Deleted passwords and cannot see where to create them again, as it never prompts me for new ones.

Thanks.

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.

I'm running Thunderbird 140.5.0esr (32-bit) on Windows 10 Pro Build 19045. After the last few updates the columns in the email listings are changing widths from what I've set them, this seems to happen after I close then reopen Thunderbird; which I'm having to do more often these days to resolve weird calendar malfunctions. For instance, the data column would appear so narrow that only the month/day show with "..." at the end, when I know I've looked at this yesterday with the full view of the date and time showing. I've reviewed my options and I've set them individually, set them globally and it makes no difference. Of course I've rebooted, etc. I have over a hundred local folders and they all change differently, of course some look the same but others don't. Most have the same column headings selected but it doesn't seem to matter. Some have the "Correspondents" column selected but many don't.

This is very irritating and I'd like to know why Thunderbird is doing this, and more importantly, how can I prevent this behavior in the future. Thanks,

Yes this is the problem when working with Thunderbird’s import of a CSV file, the Match field names option only is allowed on the first attempt. That told me that the source fields and first Record columns did not have useful fields to even try to Match field names. So I went and edited the CSV file to try to get at the Match Field names option but it was not available no matter what I fix or tried. So to me the problem is with Thunderbird’s “ surmising that since I was given the Match field Names screen that I Thunderbird never gives the Match Field names on subsequent attempt. Thunderbird needs to give the Match field Names screen as an option on every attempt not just the 1st attempt.

The below screen was given to me by one of the consultant’s attempt. And you can see that he had a CSV file with the THUNDERBIRD’s preferred CSV options!!!

I have several different local calendars set up in my Thunderbird. I want to unsubscribe to a specific one. When I select "Unsubscribe from Selected Calendar" from the Events and Tasks drop down, the Calendar selected is not the one I want to subscribe from. How do I select the Calendar I want to unsubscribe from prior to selecting that menu option. I have searched through the forums and have found references to opening a Calendar tab and right clicking on the left pane to select a Calendar. When I right click on the Calendar tab, I just get the options to Open in New tab or close the current tab. I'm not understanding something and I'd appreciate any clarification on this step. I am including a screen shot that shows the Unsubscribe screen. The calendar that is selected is my Google calendar, but I don't want to unsubscribe from Google. I want to unsubscribe from a duplicate local calendar. How do I do that?

 Thanks!

I quite often get this message, though it tends not to be a problem later "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox"

One of the solutions seems to be Compact a File. How do I do this?

I successfully imported the self-signed CA certificate into thunderbird. Then I tried to import the p12 S/MIME client certificate and this error message popped up (cf. screenshot below).

However, I checked the client certificate and it seems fine:

1. openssl pkcs12 -in smime-client-certificate.p12 -info -noout

Enter Import Password: MAC: sha256, Iteration 2048 MAC length: 32, salt length: 8 PKCS7 Encrypted data: PBES2, PBKDF2, AES-256-CBC, Iteration 2048, PRF hmacWithSHA256 Certificate bag PKCS7 Data Shrouded Keybag: PBES2, PBKDF2, AES-256-CBC, Iteration 2048, PRF hmacWithSHA256

1. pk12util -l smime-client-certificate.p12

Enter password for PKCS12 file: Certificate(has private key):

   Data:
       Version: 3 (0x2)
       Serial Number: 1 (0x1)
       Signature Algorithm: PKCS #1 SHA-256 With RSA Encryption
       Issuer: "..."
       Validity:
           Not Before: Thu Feb 19 13:32:18 2026
           Not After : Sun Feb 17 13:32:18 2036
       Subject: "E=user@example.com,CN=user@example.com,
           O=example.com,ST=...,C=..."
       Subject Public Key Info:
           Public Key Algorithm: X9.62 elliptic edwards curve public key
       unknown SPKI algorithm type
       Raw:
           69:58:ee:5d:45:3f:10:d9:bb:8c:a3:b6:a5:c6:16:a6:
           53:78:65:77:73:5d:e0:6f:60:df:2c:32:f3:c2:e2:58
       Signed Extensions:
           Name: Certificate Basic Constraints
           Data: Is not a CA.

           Name: Certificate Key Usage
           Usages: Digital Signature
                   Non-Repudiation
                   Key Encipherment

           Name: Extended Key Usage
               E-Mail Protection Certificate

           Name: Certificate Subject Key ID
           Data:
               99:8a:6d:e4:ec:3a:25:5d:ad:26:a0:36:e1:da:a2:ea:
               bc:88:79:50

           Name: Certificate Authority Key Identifier
           Key ID:
               f5:6c:37:9a:37:d1:81:43:d3:54:3f:b9:33:23:85:c1:
               7e:17:73:88

           Name: Certificate Subject Alt Name
           RFC822 Name: "user@example.com"

   Signature Algorithm: PKCS #1 SHA-256 With RSA Encryption
   Signature:
       44:3a:5e:d7:44:51:f1:3c:a3:80:d8:54:f4:9c:d8:0b:
       ...
   Fingerprint (SHA-256):
       88:95:7A:DF:A5:7C:D1:E8:A5:55:A8:18:BD:BD:7D:92:1F:7D:6E:17:26:68:39:84:26:F3:F6:F3:4A:5C:56:90
   Fingerprint (SHA1):
       72:83:D0:13:C9:C9:AD:46:CA:C3:73:66:9E:79:5B:5C:3B:2E:81:47

Key(shrouded):

   Encryption algorithm: PKCS #5 Password Based Encryption v2 
       Encryption:
           KDF: PKCS #5 Password Based Key Derive Function v2 
               Parameters:
                   Salt:
                       dc:f9:bf:4a:80:e1:7c:4a:b4:f5:52:6b:9b:d5:75:ad
                   Iteration Count: 2048 (0x800)
                   KDF algorithm: HMAC SHA-256
           Cipher: AES-256-CBC
               Args:
                   04:10:0d:a4:96:03:00:2a:d5:a6:fe:d3:6c:a5:d0:12:
                   67:b3

What is going on and how to troubleshoot this issue as there is no logging about this matter into /var/log/syslog?

Environment: - Ubuntu 25.10 - thunderbird 2:1snap1-0ubuntu3

Hello, i want to integrate my dates from a Google Calendar on my smart phone (Samsung) in the calendar from Thunderbird (Version 147.0.2 64 Bit). Is it possible an how to do it? Greetings from Horst

A fair number of folders in my primary email address's inbox have been out of sorted order for at least several months.

Most of them are folders I access quite often; they now appear AFTER what used to be the last folder ("Zoom").

If this is a "feature," I suggest moving the highest activity folders to the FRONT of the inbox rather than to the BACK.

HOW DO I RE-SORT MY INBOX FOLDERS?

Thank you.

This morning, after subscribing some new members to my Gardenplot blog, I was unable to access my inbox which was empty and stated "No New Messages". It is very likely that during the subscription process I made a bad command. But how do I correct this? Please note that I have a second account linked to Thunderbird, namely quartzquest@gmail.com, from which this current message issues.

Many thanks for your help

Douglas Smith

Hi

Just checking when ThunderMail and Pro will be available? I'm in need of email services for my small business and just don't want to subscribe to Google. I love Thunderbird, glad it survived so many transformations over decades and would like my subscription contribute to further development.

Can you, please provide me with at least estimated timeline?

Thank you S

Hi, I’ve been using Thunderbird, but after installation it’s taking up 128GB of disk space. That seems unusually large — could you please help check what might be causing this?

When I open Thunderbird, I get a pop-up that says "Login to server pop.centurylink.net with username(my email address)@centurylink.net failed" It asks me to enter my password. I enter my password, and I get the same message again. I can access my Centurylink email through webmail, using the same password that Thunderbird refuses to acknowledge, so I am using the correct password. Has anyone else had this problem? Does anyone know how to fix it, even if they haven't had this problem?

By the way, Thunderbird updated when I opened it a few minutes ago. The problem was already happening before the update and continues to happen since the update, so the version of Thunderbird I'm using doesn't seem to be the problem.