Thunderbird Community Forum

Hello all:

After migrating to a new machine I finally have TB set up and running nicely. As I checked the individual settings and C: folders for the e-mail accounts under the server settings for each account (there are two, law and business), and the local folders (for long term e-mail storage, under Local Folders, Local Directory settings), I discovered the C: folder for the Law e-mail account is gigantic - when I check the properties in File Explorer it comes back as 331 GIG, yes, gig. More disturbing is that most of this appears to be "dark matter" that does not "show up." I total the visible files and folders inside that location and it is roughly 150 meg.

For comparison, the folder directory for Business e-mail account is only 24.9 gig, and the directory for the local folder for long term e-mail storage only clocks in at 11.1 gig.

Any ideas why the law firm e-mail account C: drive storage would be this large, with so much of it not visible?

Thanks for any thoughts.

Larry Reese

After the last TB update I had to delete one of my email accounts. Now when I try too reinstall it, it connects to the wrong account. I am using a bellsouth.net account. There a two accounts and TB will only connect to one of the accounts eventhough I use the correct account name and password to set up the account.

When I get to the "Choose your email account type" screen i get "Configuration found in Mozilla ISPDB".

My Thunderbird version 140.8.0esr (32-bit) started to refuse sending mails this morning.

The error message suggested to change the authentication method or if it still not working, my password could be stolen.

I tried changing authentication method, it did not solved the problem so I changed it back to original setting as seen in the picture.

I was afraid my account was hacked. I tried to send messages from my email account via other platform (the Web Mail service from the hosting company) and via my Android phone, mails sent successfully. So, my email account is safe.

Since it is my business email account, I have been using it on Thunderbird daily for decades and I never encountered this problem before. Problem just started this morning.

I tried to create a new Outgoing SMTP with same setting and deleted the old one, it didn't help.

Although my Thunderbird refuse to send out mails, it receives incoming mails as usual.

Hope someone can figure out this problem and help!

Thanks in advance.

Tim

Translation: My emails in Thunderbird suddenly disappeared.

They were over 10,000, but now they're down to only 7,800.

Why?

Original: Email saya di thunderbird tiba-tiba menghilang, awal nya sejumlah diatas 10 ribu , menjadi hanya 7800 ? kenapa

I am trying to add a business gmail account to my Thunderbird on Desktop and have run into difficulty.

I tried to use This Article in order to overcome the issue, however it is dated 2018 and seems very out of date with the current UI. So I am struggling with how to rename the incoming/outgoing servers to allow the new gmail account into the host.

When I try to add the gmail account I get the window to sign into the new account, but when I click continue I get "The server cannot process the request because it is malformed. It should not be retried. That’s all we know." (see attached image).

Escaping out of the log in screen brings me back to the config page which appears to have accepted the account, until I hit continue and then it tells me that the incoming server is already in use. (see the second image).

I also tried turning off the experimental add account and use the previous interface to work the problem. I got the same results both times.

Please advise, I'd really like to have access to the account emails on my desktop without using the google web interface.

Thank you DD Randall

It's pretty much in the title. My in box freezes up and no emails arrive. Microsoft will drop drop down a box asking me if I want to open THUNDERBIRD and says make sure I'm using a trusted server - app??? I don't understand any of this!

I have 2 email accounts. One is a Yahoo.com address and the other is an AT&T.net address. I have always been able to access both email accounts in my Thunderbird application on my computer (Windows 11). All Yahoo emails have always gone to my Yahoo mailbox and all AT&T emails go to my AT&T mailbox on Thunderbird. However, something happened this morning (a Yahoo popup popped up when I clicked on Thunderbird and I stupidly clicked on accept) and now I'm getting duplicate emails in both accounts. After I clicked on accept on the Yahoo popup, all my emails from all folders (inbox, trash, spam) from the AT&T server downloaded into my Yahoo mailbox (in Thunderbird) and were deleted from my AT&T server from myyahoo.com (not on Thunderbird). Is there anyway to reverse this or change something in the Thunderbird application so I can go back to what it was previously (all Yahoo mail goes to my Yahoo.com mailbox and all AT&T mail goes to my AT&T.net mailbox in Thunderbird)?

I have contacted Yahoo and AT&T about this and after spending most of the day on the phone with each of them, they informed me that since my mail provider (Thunderbird) is a third party application, I would have to contact Thunderbird.

Please help!

Andrea

I've been afraid to upgrade T-bird since 102 because last time, it changed the look and feel of my program. Honestly, I had a devil of a time getting panes reconfigured back to looking how I had it. After that, I turned off updating.

If it matters, I've got Classic view enabled (along with folder and message panes).

So to my question, if I update, will everything stay the same. Honestly, if it's going to change again, then I may stick with what's working. A friend is suggesting Betterbird, but I may just bite bullet and go to Gmail.

Does what I am asking make sense? I just don't want the layout to change based on what someone – who isn't me – thinks is better because I 'like' how I have it configured.

Many thanks!

I haven't been receiving mail from a club I belong to. It was suggested that I approve the receipt of mail from the domain that sends the mailings for the club. But there is no mail from this domain in my inbox, trash, or spam. Is there any way to approve this domain? The domain name is email.onrsu.com

Hello. I recently upgraded from my older MacBook Pro (now factory reset and sold) to a new MacBook Air. I use Thunderbird as my email client and I have many folders that live within my Local Folders. When I transferred all the data from the older Mac to the new Mac via iCloud, and set up my new mail account (IMAP), the folders did not download into the program. I've tried using Subscribe but none of my pre-existing folders show up. Any assistance would be much appreciated. Thanks.

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.

I cant receive emails only send them. I receive an error message when starting Thunderbird "the current operation on inbox <my email address> did not succeed"

Just a couple hours ago I tried to attach a photo from my Samsung phone. I was successful doing so earlier today. Now I get this message and have no idea what to do? "C:\Users\Owner\Desktop\Jack.jpg could not be opened, because the associated helper application does not exist. Change the association in your preferences." Can you help?

Can not send emails to a newly created outlook.com (free) account. Have tried dozens of different settings, approaches.

My current setup:

 - windows 10
 - thunderbird 140.8.0esr (64-bit),  numerous previous versions also do not work
 - outlook.com (free) account mail provider
 - POP3 enabled (tried IMAP enabling also) on outlook.com account
 - no 2FA or 2FA enabled on outlook.com account, no difference
 - outlook.com web access works fine
 - followed instructions in mozilla support article Microsoft OAuth Authentication and Thunderbird in 2024 
      (https://support.mozilla.org/en-US/kb/microsoft-oauth-authentication-and-thunderbird-202)
 - have done a fresh install on a new machine without an existing profile.
 - have tried various microsoft servers, have tried oauth2, normal password
 - thunderbird account creation works just fine.
 - server settings and SMTP settings match as recommended by support article noted above
    SMTP server settings
        server name: smtp-mail.outlook.com  
        port: 587
        connection: STARTTLS
        authentication: OAUTH2
        user:  xxxxxxxx@outlook.com

symptoms:

 - receiving(downloading) emails works fine.
 - sending emails fails with following messages
     Login to server smtp-mail.outlook.com with username  xxxxxx@outlook.com    failed    followed by 
           Unable to authenticate to Outgoing server (SMTP) . Please check the password and verify the 
             'Authentication method' in 'Account Settings | Outgoing server (SMTP)'

Many people seem to be having this issue with no resolution.

Please help.

I made a folder and saved emails in that folder. A few days later they were all gone, empty folder. I followed suggestions on here, did the repair, erased password and replaced it, did the subscribe, and now even the folder is gone. I spent hours trying to research this and repair it and now I have nothing.

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?

Solo pochi vecchi messaggi erano presenti. Non riusciva a connettersi con Virgilio e mi chiedeva una nuova password. Non riuscivo a fare niente perché continuava a chiedere. Dovevo chiuderlo stavo pensando di usare outlook o gmail. Alle 1745 l ho riacceso e funzionava tutto. Sono riapparsi i vecchi messaggi ed arrivati quelli nuovi di oggi . Non so che dire

Using TB 147.0.2 on Windows 11. Installation went very smoothly, including importing all my IMAP, Gmail, and iCloud accounts. Kudos!

However, my iCloud account has four calendars (personal, shared, travel, work) and TB only sees two of the four. I can't pinpoint any reason why. There's nothing special about the two it sees or the two it doesn't, as far as I can tell.

Any hints? Suggestions? Ridicule?