Thunderbird Community Forum

A NEW password is required EVERY time to make e-mail go in or out: "Set the password for (e-mail address) in mailin.telia.com" and "Set the password for (e-mail address) in mailout.telia.com". Each time I have to get a password from "Telia Webmail" (!). This is happening since Summer 2025. I´ve checked the e-mail account installation details and it is identical to the original (when I installed it first time). I´ve also made a new account (with another e-mail address) but it didn´t help. HELP!

I have been having a problem with calendar reminders popping up and not being able to "snooze" them.....I can select minutes/days/weeks etc but I am not able to click the check mark....all I can do is close the window so the reminder comes back in minutes.

This was an issue for a while and then one day it was magically working.....for a month or three ---then today it stopped working again. I am assuming due to an update.

Side note -- I wish we could choose to NOT update EVERY PIECE OF SOFTWARE -- if its working leave it alone....but I digress.

Any help on this issue would be appreciated.

Very little to do with accounts, but none of the selectable topics cover 'user Interface'.

Used to be able to open different accounts in different windows. Can't remember how, but it was obvious. Once new window is created, each time Thunderbird is started it re-creates them. I accidentally closed one and can find no way to re-open it. I use three email accounts each needing a different mindset, so keeping them in different windows helps. Also one has a screendepth full of folders and so is easier to handle in its own window. (The others are still there but only take up one line each when collapsed.

140.7.1esr (64-bit) Mozilla Thunderbird Snap for Ubuntu ubuntu-snap-build - 1.0

Without client certificate configuration, the user can retrieve its emails on the dovecot IMAPs server using a password.

When I try to authenticate the user with an S/MIME client certificate, the dovecot server reports that: ```dovecot: imap-login: Login aborted: Connection closed (client didn't send a cert) (client_ssl_cert_missing)```

Here is the configuration: 1. On the client side: I've imported into thunderbird: - the self-signed CA certificate - the user's S/MIME client certificate which is fine: ```

1. pk12util -l user@example.com.p12

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

   Data:
       Version: 3 (0x2)
       Serial Number:
           00:c3:10:d5:01:d1:9c:3c:4c:26:a7:a9:4d:90:f0:49:
           03:a8:f3:71:d6
       Signature Algorithm: PKCS #1 SHA-256 With RSA Encryption
       Issuer: "O=Example,ST=Yvelines,C=FR"
       Validity:
           Not Before: Mon Feb 23 14:26:26 2026
           Not After : Thu Feb 21 14:26:26 2036
       Subject: "E=user@example.com,CN=user@example.com,O=Example,ST=Yvel
           ines,C=FR"
       Subject Public Key Info:
           Public Key Algorithm: PKCS #1 RSA Encryption
           RSA Public Key:
               Modulus:
                   c7:f9:af:0a:53:72:a9:de:f0:db:bb:ad:86:90:15:f1:
                   ...
               Exponent: 65537 (0x10001)
       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:
               68:5f:60:6d:8b:c8:0c:28:e3:d9:49:ca:bd:c7:25:a0:
               24:4c:2c:40

           Name: Certificate Authority Key Identifier
           Key ID:
               00:eb:69:5d:78:80:7f:1b:7f:e3:2b:fa:15:c3:9b:e6:
               68:98:fa:f6

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

   Signature Algorithm: PKCS #1 SHA-256 With RSA Encryption
   Signature:
       71:1b:e4:78:b0:21:f7:20:78:50:80:87:c8:71:a2:9c:
       ...
   Fingerprint (SHA-256):
       7F:8D:00:DF:04:02:39:90:11:B2:7D:5F:D3:EE:A7:2D:EF:58:B3:A9:4B:79:ED:D5:FE:2A:70:74:06:33:ED:31
   Fingerprint (SHA1):
       4E:7C:3B:31:58:32:8A:C3:42:26:CB:D3:DB:54:95:C5:C1:06:19:14

Key(shrouded):

   Encryption algorithm: PKCS #5 Password Based Encryption v2 
       Encryption:
           KDF: PKCS #5 Password Based Key Derive Function v2 
               Parameters:
                   Salt:
                       f2:73:28:5b:0b:6c:36:ec:1f:ca:1d:19:b3:77:87:7e
                   Iteration Count: 2048 (0x800)
                   KDF algorithm: HMAC SHA-256
           Cipher: AES-256-CBC
               Args:
                   04:10:be:da:bb:10:d3:94:e0:82:b3:2b:c2:ad:39:b5:
                   3b:4e

``` I've setup the account to - use its certificate - use a TLS certificate as an authentication method. There is no S/MIME certificate option.

2. On the dovecot (2.4.1) server side: The server is configured to require client certificates for all IMAP connection: ``` protocol imap {

 ssl_server_ca_file = /etc/ssl/CA_CRL.pem
 ssl_server_request_client_cert = yes
 ssl_server_cert_username_field = commonName
 
 auth_ssl_require_client_cert=yes
 auth_ssl_username_from_cert = yes

} ```

Does that mean that I also have to import a TLS client certificate? If so, what format should it (.p12, .crt...) be?

The Thunderbird UX indicates the outgoing email server is smtp.mediacombb.net, but the MessageSend.sys.mjs sender tries to send the email on mail.mediacombb.net. This is BLOCKED by my ISP.

Log Message: Sending failed; An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: EHLO 173.27.140.38 blocked. AUP#SMTP., exitCode=2147500037, originalMsgURI=mailbox-message://athasm@mail.mediacombb.net/Drafts#1

Why would the UX and the actual SmtpClient code be sending to a domain different than the UX indicates?

Good afternoon.

When I receive emails such as password resets, or email verifications, etc., they always contain a line such as "click the link to verify your email", and they never display correctly like they do in other email programs, and I have to literally copy and paste the link in a web browser manually.

Is there a setting somewhere that I am missing?

Today 2/25/26 when I signed into TB, it made me authorize each email address with Yahoo..before doing so I googled and it said this was because the authorization needed to be renewed..soooo i did so for my several Yahoo-Cox accounts but now a folder that was on one account appears under another and all the email going to that account are being also sent to the other..I have checked to make sure in the tools and settings there are no forwarding indicated..any suggestions?

DEUTSCH (English see below):

Hallo zudammen,

Konfiguration: - Window11 25H2 (aktuell) - Thunderbird Beta-6 (BuildID=20260213180051) - gpg2.5.17 (Gpg4Win 5.0.1); siehe auch: <https://www.gpg4win.de/>

Der bisherige und standarmärige Installationspfad von "Gpg4Win": "C:\Progam Diles (x86)\Gpg4Win\" wurde softwareseitig auf: "C:\Progam Diles\Gpg4Win\" geändert!

Bug 1967121 (Closed) => thunderbird148 --- fixed! <https://bugzilla.mozilla.org/show_bug.cgi?id=1967121>

Zur Zeit verfolge ich die Änderungen bezüglich der externen Schlüsselverwaltung in Thunderbird-Beta, da das Arbeiten mit externen Schlüsseln in der esr- und in der relesease-Version von Thunderbird seit der offiziellen Herausgabe von gpg2.5.x absolut nicht mehr möglich ist! Die geheimen Schlüssel für das Entschlüsseln und Signieren werden mit gpg2.5.x nicht mehr gefunden!

In der Schlüsselverwaltung von TB-Beta befinden sich meine öffentlichen Schlüssel und alle öffentlichen Schlüssel meiner Kommunikationspartner. Extern sind meine geheimen Schlüssel gelagert. Folgende Präferenz wurde aufgrund von gpg2.5.x hinzugefügt:

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2026-02-25-14-35-46-df59be.png

Allerdings erscheint nach all diesen Maßnahmen die Fehlermeldung: "The secret key that's required to decrypt this message is not availlable."

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2026-02-25-14-36-58-d8280e.png

Mit Herausgabe von Thunderbird/148.0 (release) sind dort die gleichen Probleme mit der externen Schlüsselverwaltung zu bepbachten!

Mit Versionen gpg < 2.5 funktioniert unter Windows alles problemlos!

UNTER LINUX haben hier Änderungen an der Präferenz: "mail.openpgp.load_untested_gpgme_version" nachweislich keinerlei Auswirkungen!

Was übersehe ich?

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

ENGLISH:

Hello,

Configuration: - Window11 25H2 (current status) - Thunderbird Beta-6 (BuildID=20260213180051) - gpg2.5.17 (Gpg4Win 5.0.1); see also: <https://www.gpg4win.de/>

The previous and default installation path of "Gpg4Win": "C:\Program Files (x86)\Gpg4Win\" has been changed by the software to: "C:\Program Files\Gpg4Win\"!

Bug 1967121 (Closed) => thunderbird148 --- fixed! <https://bugzilla.mozilla.org/show_bug.cgi?id=1967121>

At the moment, I’m following the changes regarding external key management in Thunderbird Beta, because working with external keys in the ESR and release versions of Thunderbird has become absolutely impossible since the official release of gpg 2.5.x! The secret keys required for decryption and signing are no longer found when using gpg 2.5.x!

In Thunderbird Beta’s key manager, my public keys and all public keys of my communication partners are present. My secret keys are stored externally. The following preference was added because of gpg 2.5.x:

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2026-02-25-14-35-46-df59be.png

However, even after all these measures, the following error message appears: **"The secret key that's required to decrypt this message is not available."**

https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2026-02-25-14-36-58-d8280e.png

With the release of Thunderbird 148.0 (release), the same problems with external key management can be observed there as well!

With gpg versions **older than 2.5**, everything works flawlessly under Windows!

• • UNDER LINUX**, changes to the preference

"mail.openpgp.load_untested_gpgme_version" have demonstrably no effect at all!

What am I missing?

I want to create an email contact that will send to two separate addresses every time I am on v 148.0, I see the instructions for adding a mailing list but the instructions found so far do not appear valid for this version. File>New>Mailing List

I am using a condav address book, perhaps this where the problem originates

Can I create the contact in the condav book directly and have it show up and work in TBird?

I have created a mailing list in the "collected addresses" address book as a workaround

Will try the direct entry to condav to test that method

Computer PC-A died. Had access to data

Recovered PC-A:CalA: ... users .... roaming ... <profilename> calfiles

Installed TBird on another machine (PC-B) Copied the three sqlite files from backup to same location on that other machine. Deleted WAL file. Restarted. CalA does not appear' on PC-B.

is the <ProfileName> in the sqlite files?

What to do?

Hi

When Thunderbird is started maximized it overlap taskbar if is set to hide and taskbar won't show until Thunderbird is minimized and maximized. Another way is to press the Win key two times. Then the hided taskbar can be shown/use. The same thing happens to Firefox. Only when is first started. Then if Firefox is minimized and maximized, press Win key two times, press F11 two times then the hided taskbar show/hide normal.

It is a setting that can be changed to start Thunderbird and Firefox in full screen and do not overlap hided taskbar?

I can receive mail fine. Cannot send mail on gmx.co.uk acct, but gmx.net works on oauth2. But oauth2 is missing on gmx.co.uk It's just not on the pulldown. I tried a new thunderbird acct for gmx.co.uk but oauth2 is still missing.

Continuation of my prior post: https://support.mozilla.org/en-US/questions/1516342

Thunderbird has a routine problem with being unable to log into various mail servers. I have four accounts and they all seem to share this problem.

Most recent update: I've tested this in Windows Safe Mode, and the problem has not appeared. Since I can't do any useful work in Safe Mode, it's hard to give it a thorough test, but so far so good. Also, I have removed AVG antivirus because it was redundant. I have seen no improvement since it was removed.

Can this problem be resolved?

I opened Thunderbird this morning and my Drafts folder is empty. Not only that but when I am composing an email and hit Save, which is setup to save to Drafts folder, I get a little popup that says Copying message to drafts folder. I open Drafts folder and it is not there. However, this new message that I tried to safe to Drafts shows up in a folder named All Mail. I try to drag it to Drafts but it does not copy or move to Drafts. I created a new folder and named it Drafts 2 then copied this test message to Drafts 2. But where are my original Drafts folder contents> I have changed absolutely nothing in Thunderbird. No settings changes, no nothing. What the heck? I had important things in my Drafts folder and now they are gone.

Oh, this happens on my Primary Gmail account. I open Gmail in my browser, check Drafts and it's empty too.

I check my ISP furnished POP3 account and it has a message in Drafts. I create a new message, save it to drafts in this POP3 account and Thunderbird147 puts it there.

Using latest thunderbird on desktop, if I create account, thunderbird pops up a window but the window greys out and never gives me a way to input password. There’s a url at the top but it never goes

I don't receive email on my computer in MX. I did for 2 months. Now it's stopped. I tried to change to "No Proxy" as AI advised, but that doesn't register/the computer button remains white.

I am trying to set up a visualization of the columns of the main interface. Here's what I do:

1. Click on the list icon in the top right corner.
2. Uncheck the columns I want to hide. Specifically, From (CB), Recipient (CB), and Correspondents (CB).
3. Apply the selection to all folders: click on the icon in the top right corner, apply columns to.. > folders and its children... > select account > Confirm

These actions produce immediate results. However, the next day or a few days later, when I reopen the program, the column display changes. Sometimes in the main folder (inbox), sometimes in the subfolders.

Is this a known bug? Is there anything I can do to keep the desired column configuration stable?