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When I open Thunderbird (Mozilla), my files are not current. In other words, the most recent emails, probably since the last time I used Thunderbird, in my file folders are missing. I have tried changing the server settings but I think they are correct. Please be patient with me, I am unfamiliar with all the terminology, etc. Also, when I first enter Thunderbird, it does not recognize my password. A window opens with the message "Login to server imap.postoffice.net with username john.fn@usa.net failed." That message also appears when I click on Get Messages. Thanks for any help.

Starting on 10/01/2024 Thunderbird no longer allows me to send or receive email.

When I try to read messages using Thunderbird, I get the following: Sending of password for user XX@msn.com did not succeed. Mail server outlook.office365.com responded: Logon failure: unknown user name or bad password.

When I try to send messages using Thunderbird, I get the following: Enter your password for XX on smtp.office365.com:

I have tried redoing the password and it does not help.

This is on a WIN/10 system. I updated to the latest version of Thunderbird and it did not help.

I checked out Thunderbird on my WIN/XP and get the same results as with WIN/10.

When I use Firefox and login to https://outlook.live.com/mail/0/, I can send and receive email as before. The same is also true with my Mobile Phone.

Good morning, I had asked a question early on Saturday, but was unavailable the rest of the weekend so just now responding to associate Corey Bryan's answer. I had gotten a message that I am using an unsupported version and they recommend downloading the latest stable version.

He said it appears that I'm on the "Release" channel and most likely want to be on the ESR channel. I also mentioned that I am a cave-man when it comes to anything computer and am very skittish about making any changes as I don't how to straighten out any errors that might occur.

He asked me where I installed Thunderbird from and the answer is that I don't know. It was an IT guy that did it many years ago.

So I guess my questions are, if I've been using this version for years, do I need to or should I update it? If so, if I click on the latest stable version of Thunderbird, will that change anything on my computer, aside from getting the newer version of T-Bird? And will my e-mails in Thunderbird look any different?

Thanks very much for the help. Tony

I just upgraded to 128.2.2esr and cannot receive or send messages after the update. I have restarted the computer and tried again - still nothing. I'm unable to use a tool that is critical for my daily needs.

Trying to send just says "Connected" or "Sending" but never completes. Worked fine before the update which was just in the past hour or so.

Same issues with downloading new email or sending email for all accounts. :(

Anyone else having problems? Ideas?

Thank you!

I installed Thunderbird and typed in my Office 365 email information to connect my account. Thunderbird found the correct IMAP settings, which I verified on Microsoft's website. It proceeds to open a browser so I can authenticate my account. After that succeeds it starts downloading all of my messages & folders. I thought everything went fine until I attempted to send a message. I get the following error:

Login to server smtp.office365.com with username me@mydomain.com has failed.

It gives me the option to enter a new password, which doesn't make sense since it's oAuth2 but I created an app password to see if that would work, and it didn't. The only other options are cancel & retry which don't help either.

I thought maybe something went wrong with the authentication process so I uninstalled thunderbird and started again with the same results. I've tried many other server settings, but nothing works, so I'm here.

Current Settings:

Server Name: smtp.office365.com User Name: me@mydomain.com Authentication Method: oAuth2 Security: STARTTLS Port: 587

I've tried: Using Port 465 / SSL/TLS Using Port 465 / STARTLS Using Port 587 / SSL/TLS Changing Auth method to Normal Password and then using app-specific password. Uninstall / Resintsall

One final thing to note: I followed the same process with my fastmail.com account, which worked flawlessly. I can send & receive fine.

Hi

 I am using version 115.14.0 (64-bit) and I am using Fedora 39, up to date OS.  I have been using ThunderBird for a very long time.  I have been experiencing an issue which, unfortunately, seems to come and go.  I am experiencing this issue on 2 separate physical computers.  How can I restore the list of emails under any account when they are not visible?
 This is very troubling ...

Robert

Hi there - been using Thunderbird for donkeys (since it was Eudora!). A few weeks back I started to get messages from Microsoft that I needed to change security settings as they were no longer supported on 3rd party email handlers like Thunderbird. So I re-created the three accounts I had there and it seemed to be OK, though SMTP did not have the OAUTH2 option available ... and when I tried to use the new SMTPs they wouldn't work. So I reverted to the old settings there and it worked again.

But this morning, with the big update to Thunderbird Nebula, I can no longer send emails from the MS accounts. My Gmail one is still OK ... but whatever I try, I cannot get the MS ones to send emails - I get a failure connecting.

Login to server smtp-mail.outlook.com with username xxxxx@hotmail.com failed.

I checked on MS and the details shown there:

SMTP server name smtp-mail.outlook.com SMTP port 587 SMTP encryption STARTTLS Authentication Method OAuth2/Modern Auth

Are what I have (I did have a different SMTP Server name came up - smtp.office365.com - but that doesn't work either)

So ... where is the issue? Is this a bug in the new Thunderbird setup? Something else? I don't know where to go ...

David

I use SMTP settings

Description: smtp.office365.com Server Name: smtp.office365.com Port: 587 User Name: mypersonalaccout@hotmail.com Authentication method: OAuth2 Connection Security: STARTTLS

but TB is incapable of sending email. Either I got dialog https://software9119.technology/__other/tb/dialog.png or error https://software9119.technology/__other/tb/timed-out.png.

I tried cleaning cache and made some re+/search with no avail. There seems to exist some Authenticated SMTP but this is only available on Exchange 365 while this is my personal Outlook.com account.

Same question had Bill Swartout at 1/9/24, 2:30 PM with no answer, https://support.mozilla.org/en-US/questions/1423404#answer-1629472.

I'm a Thunderbird novice.

I had Thunderbird working to allow me to read and write messages to the Quicken newsgroup.

Something went wrong (Thunderbird was displaying the Quicken newsgroup name twice - in the left column), but clicking on either of the displayed names produced a blank screen. It did not matter what the read/unread setting said: no messages diaplayed.

So I tried reinstalling Thunderbird - which is requiring me to set everything up again. I struggled to get setup the first time, and this time I'm getting almost nowhere.

First: Thunderbird setup my email account even though I don't want to use Thunderbird for my email. I'm hoping that's just a minor annoyance, though I'd like to get rid of the Thunderbird email account.

But I am not getting anywhere setting up the Newsgroup.

I'm trying to use www.eternal-september.org to get messages from the newsgroup alt.comp.software.financial.quicken - which was working fine before I had to reinstall.

Is there a simple step-by-step guide I can follow to achieve my goal.

I get a message like this every time I start Thunderbird. The topic came up last year but the conclusion was along the lines of "...this problem will be fixed in version 128" but it was never clear whether or not the User followed Mozilla's support replies or what they had to do to clear the email message from Thunderbird. .....Well I'm running version 128.1.1esr and the problem still exists.

My questions:

1. What is Thunderbird trying to do? Compact individual email files? Compae from ct the whole Thunderbird Profiles folder?

2. Is the problem the size of the Profiles folder or the overall size of the hard drive the Profiles folder resides on? What is the Hard/solidstate drive is the maximum?

3. Is the problem related to the amount of Free Space left on the Hard/solidstate drive or is the issue the number of individual files?

4. Is the issue related to the number of Thunderbird files and/or folders OR is it related to the total number of files and/or folders on the hard drive?

5. Is there a limit to the number of sub-folder levels that Thunderbird can navigate?

Thank you.

Tom

Tom O'Brien TOBrienArchitect@gmail.com

since 8/22/24 I have been unable to send email from one of my personal domains. Same install of T-Bird successfully sends SMTP via Gmail and my other domains.

I receive the error shown in the first photo below. Sending of the message failed. An error occurred while sending mail. Outgoing server (SMTP) error. The server responded: us2.outbound.mailhostbox.com ESMTP not accepting connections.

I have been back and forth with the domain tech support. Here are the email content (parsed for easy reading)

Me > I am having difficulty sending email. > I can POP email without issue. > I am using the most recent version of Thunderbird; version 128.2.0esr (64-bit) > When I send (with or without an attachment) I get the following error: error as shown above > I have never seen this error before and cannot find it in your knowledgebase files. > My SMTP settings: > > server name: smtp.drachenfelspress.com > Port: 587 > Connection security: None > Authentication method: Password; transmitted insecurely > User Name: mcaputo@drachenfelspress.com

Tech: If you are able to download emails from our server but unable to send out emails through the same, then it is likely that your Internet service provider is blocking port 25 on your local network. For such ISPs, you must use their SMTP server to send out mails on their network. Customer Support - TH

WELL Since I was using 587 that didn't help at all.

ME the error says YOUR server, "US2.outbound.mailhostbox.com ESMTP not accepting connections." This is YOUR error, not my ISP. I was using port 587, my ISP does not block port 25.

Tech try non-SSL using the following: STARTTLS Auth Normal change server name to smtp.<yourdomain>.com

Me No change

Tech Try reducing TLS version back to 1.0

Me No difference. Restored TLS 1.3

Tech return to the mailhostbox.com server Port 587 STARTTLS Normal full username

ME ok, no difference. That is where we started, didn't work then, doesn't work now. (second photo)

Tech Try port 25

ME Same results

Tech <resets my password>

Me Did you reset my password overnight?

Tech To investigate the issue, we needed to reset the password for mcaputo@drachenfelspress.com, to enable us to configure the Thunderbird email client on our end. The temporary password is "Se!!P)iqk2" We have successfully created a Thunderbird account and were able to send emails through it without any complications. The configurations we utilized are displayed in the screenshot provided below: us2.outbound.mailhostbox.com Port 587 STARTTLS Normal full username

Then change your password.

Me I appreciate your response. HOWEVER the issue remains.

Tech We have already replied to you on this matter.

ME Tried sending on port 465 and it indicated "sending" but hung there. Using Telnet I am able to access the us2.smtp.mailhostbox.com on port 587 but I cannot trigger an AUTH login through TELNET. (see CMD screenshot below)

Tech What is your IP address?

ME It is not static, but today's is (IP address at the time given)

Tech We have done further testing by setting the ThunderBird email client for mcaputo@drachenfelspress.com to both SSL and Non SSL connections. We can see both the implementations being fetched correctly without any issues. <provides two sets of POP and IMAP settings>

ME I can POP successfully, have always been able to. Problem is with SMTP, outbound mail.

Tech Provides two incomplete setting combinations: us2.smtp.mailboxhost.com port 587 smtp.drachenfelspress.com port 25 Upon using any of the two implementations, SSL or Non SSL as configured above, there should be no issues in setting up the email client.

The SMTP and IMAP passwords (if asked any) will be the same as your current email account password.

We are unable to replicate the issue you mentioned. Customer Support - TH

ME I am unable to replicate your success. I still cannot SEND email.

Tech We have rechecked and can confirm that we are able to setup the email client on the latest version of thunderbird i.e 128.2.1 as well using the same IMAP settings as shared in previous email. We are afraid that we are unable to replicate the issue you are reporting after numerous tests from our end. As a suggestion, could you try to connect to your mail account from a different network or ISP? Customer Support - TH

ME Again, IMAP is not used on this account the issue is with OUTGOING mail. Tried both SSL and non-SSL settings for drachenfelspress.com outgoing mail will not send.

That's ALL I have right now. I am going out right now to try to send email from a laptop with a fresh t-bird install while sitting in a McDonalds on their wifi...

Help?

Problem: newly added account disappears when TB is closed. Thunderbird on this PC (Dell Latitude 6540) has held a Verizon account for years. The "new" account is a different, equally old Verizon account kept on TB in an identical PC I no longer use. When added to TB on the present PC it tests and works fine until TB is closed. Repeated numerous times. Having read thread # 1286437 I did what follows , to no avail: 1. tried TB in troubleshoot mode; 2. tried in Windows safe mode; 3. cleared startup cache; 4. drastically pruned old emails; 5. looked up profile folder under troubleshooting info. Folder qxxxxxxd ( size 1.18 GB before adding new account) holds one folder tree, one directory tree, but NO prefs.js file. Instead, twenty-two prefs-xx.js files from 1 to 22; removed all to a thumb drive except prefs-1.js which I dared not rename as prefs.js; 6. found two profile folders, both labeled default. One is the above holding 1.18 GB, the other holds 685 MB (probably harmless and related to an old university account no longer extant). I copied both profile folders to a thumb drive. Note: profile folder qxxxxxxd is clearly engaged in what I am attempting. When TB is open with the added new account working -- which is the case as I am writing --, profile folder size increases from 1.18 to 1.20 GB and the number of folders increases by one (under "Mail" the list of pop.verizon-xx.net sub-folders increases from 17 to 18). Please advise on what to do next; I am 86 and no software geek, but can follow instructions... Thanks --Paul

I use Thunderbird 128.2.0esr (64-bit) to read mail from the Outlook server; these are the folder mappings:

imap://<email>@outlook.office365.com/INBOX imap://<email>@outlook.office365.com/Sent imap://<email>@outlook.office365.com/Drafts imap://<email>@outlook.office365.com/Trash

I used to also be able to read the Junk Email folder from the Ourlook server the same way, but the folder disappeared from my Thunderbird a couple of months ago. I tried re-adding it as a sub-folder, which is how I created it in the first place, but it won't appear on the list.

I'm not sure what else to do here. I don't know where the Thunderbird directories are stored locally any more, I'm using Ubintu 24.04.

Hi, A few weeks ago, my desktop PC had to be returned to the manufacturer for repair, so I had to move my email to my laptop. I have 9 email accounts (3x yahoo, 3 x Microsoft, 2 x GMX and a Gmail). I used to train adults how to use a computer or laptop (basic training) so had addresses for different providers, so I was familiar with anything they could throw at me! Some don't get a lot of use now, but I like to keep them, for the odd occasion. All the accounts loaded sweetly at the time, some requiring 2FA, but none needing any App Passwords. A week ago My laptop had a catastrophic problem requiring me to restore to factory defaults. Since then, I have been reinstalling all the programs/apps to get it something like it was before the disaster occurred. Obviously, as part of the process, I had to reinstall Thunderbird. However, I have not been able to get any of the accounts to get set up on Thunderbird. The settings are found in the database and passed as okay, but I've been getting messages like: "Unable to login at server. Probably wrong configuration, username or password." I know the settings are correct because I have double-checked them very carefully, and I also use Bitwarden to ensure the Username and Password are correct. Initially I had wondered whether it was just one account that was a problem, and had tried other (alternative and approved) port and security settings but got a "Thunderbird failed to find the settings for your email account" message. I am puzzled, because about 3 weeks ago everything went in so easily, and I completed all nine accounts one after the other in probably less than half an hour, and now I can't complete any. I'm obviously playing with the idea of trying another email program, but also liked the calendar in Thunderbird. I'll attach some screen prints below. I also use Nord VPN, but for a fortnight it didn't matter whether Nord VPN was on or off, Thunderbird was brilliant. Today I was wondering whether that was having an effect, so I switched on Split Tunnelling, and applied Thunderbird, but it made no difference. So my next thought was whether as part of the Factory reset of the Laptop, not all the registry entries for Thunderbird had been cleared, or that there was some files somewhere that had escaped the purge and Thunderbird was still pointing to them. However, that didn't make sense, because I had Uninstalled Thunderbird with BC Uninstaller and deleted entries found after uninstallation, before I reinstalled it. So what can I do other than find some other email product, which seems unlikely at present! Kind regards.

I use Thunderbird on Windows 10; I have a verizon.net email account which I access through Thunderbird. Verizon.net email is transferred to the server from AOL Mail, and I have been able to get and send my emails on Thunderbird at verizon.net for years. This week, after Thunderbird's latest update, I have not received any incoming mail on Thunderbird, but I can see my emails on AOL Mail. The technical expert I consulted deduced that the problem is with Thunderbird such that AOL is not connecting to the incoming mail server, even after the password was changed. I can send messages successfully from Thunderbird; the outgoing mail works.

Hi everyone! I completely cleaned TB (using BCUninstaller) from the system, reinstalled, and it still won't add a google account. Tried different ways several times. I never had any problems with gmail in previous versions. Been using it for over a decade.

Before that, I had the previous TB. I decided to uninstall it completely and put the latest clean version to set everything up again.

Trying to set up Thunderbird on new computer. I do NOT want to import anything but address book from old computer. I use Thunderbird to Gmail since I also have an Android phone and want to access emails with Thunderbird and Gmail. I downloaded the Thunderbird installer, but I cannot log into Gmail when the Thunderbird setup asks me to EVEN THOUGH I know I am using the correct Gmail password, it is rejected as incorrect. Do I need to set up a whole new Gmail account? I MUST use the same email address, and I doubt Google will allow me to set up a new account with that address.

Please help.

I have the same issue and behavior reported in question 1468895 following update 128.3.1esr.

When I "get new mail," another account processes and my main one does nothing with no status message display. It used to be that when "nothing" happened, I would try again and be asked to confirm a security exception and then it worked again.

A tablet pc I use for travel with the same update continues to download mail for this account, though more hesitatingly than it did.

The error console shows: NotFoundError: No such JSProcessActor 'BrowserToolboxDevToolsProcess' pop3.server1.4: SecurityError: a SecurityCertificate error occurred Pop3Client.sys.mjs:380:18 pop3.server1.4: SecurityError info: SSL_ERROR_BAD_CERT_DOMAIN Pop3Client.sys.mjs:422:20 pop3.server1.4: SecurityError cert chain: securepop.siteprotect.com; serial# 20:C8:AF:E0:B1:95:42:48:9C:C8:21:21:4A:87:89:B8 <- Avast Web/Mail Shield Root; serial# 4D:D7:A4:81:AF:9D:DF:4D:8F:45:D8:21:07:23:2D:0A Pop3Client.sys.mjs:427:22 tb.account.size_on_disk - Truncating float/double number. 2

I turned off the antivirus email feature and then it read: NotFoundError: No such JSProcessActor 'BrowserToolboxDevToolsProcess' pop3.server1.4: SecurityError: a SecurityCertificate error occurred Pop3Client.sys.mjs:380:18 pop3.server1.4: SecurityError info: SSL_ERROR_BAD_CERT_DOMAIN Pop3Client.sys.mjs:422:20 pop3.server1.4: SecurityError cert chain: securepop.siteprotect.com; serial# 0F:F0:5D:99:50:38:74:73:10:57:9F:F7:75:85:06:4A <- GeoTrust TLS RSA CA G1; serial# 0D:07:78:2A:13:3F:C6:F9:A5:72:96:E1:31:FF:D1:79 Pop3Client.sys.mjs:427:22

I have used Thunderbird for years without issue. In the last 2 days, it keeps crashing on one of my laptops (fine on the other). I sent a crash report, but I can't reopen Thunderbird. I tried both quitting and restarting. I shut down my computer and restarted it. I tried updating by downloading the latest version, but that didn't work either. I completely uninstalled it, reinstalled it, and it worked for a few hours. Now, it is back to the Crash Report.

Any suggestions? I love TB and don't want to switch to something else.

Christine