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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.

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

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?

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.

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

After Thunderbird just updated to Version 128.5.0esr today, now all my accounts are saying that the connection is refused. This is coming from three different email services that I have accounts on. I'm assuming it's not an issue with those servers as I can access them just fine with a different email client, and I didn't change any settings. Yesterday it worked, today it doesn't. Only thing that seems to have changed is Thunderbird got updated.

A while back I managed to both widen my sliders and change the color to improve visibility from the grey that is barely different from the background color. It work most of the time, I made the change tinkering with GTK. Here's my gtk.css file:

scrollbar { background-color: #cccccc; } scrollbar slider { min-width: 20px; }

/* dark green: pointer is not in the active window */ scrollbar slider:backdrop { background-color: #00aa00; }

/* green: pointer is in the active window but not on a slider */ scrollbar slider { background-color: #00ff00; }

/* dark red: pointer is hovering over slider but mouse button not pressed */ scrollbar slider:hover { background-color: #aa0000; }

/* red: slider is active */ scrollbar slider:hover:active { background-color: #ff0000; }

... it always works in the 'inbox' window and usually works for message content, but some messages insist on continuing to show the tiny grey slider that's almost invisible. Is there some way I can fix that? If anyone's interested I can forward examples of both situations. Image on the left is what I want. Image on the right is the tiny grey slider that I can't see.

Hi. I have created 2 subfolders in "Drafts", which ALSO turned into draft folders:

• The folder icons switched from the standard folder icon to the "Drafts" icon.
• The right-click context menu is reduced (just like for other special folders), e.g. the "delete" command is missing.

So how can I delete this misbehaving folder now ?

I doublechecked in my account manager and via config editor that the subfolder are NOT used as DRAFTS folder for any of my (POP3/maildir) accounts.

Thank you so much.

On Xubuntu 24.04: In compose, the image file picker stopped working after a recent update to Version 128.3.1esr (64-bit) These images are simple png or jpg from my Pictures Folder. I double checked that all accounts all do allow html composing. The 'Choose File' Button does nothing at all. I was expecting a pop-up file picker.

TB was working great until ten days to two weeks ago. Now it constantly crashes, crash reports fail to send, can't open emails, reply or forward, nothing works and then it crashes again. I have had complete virus scans, malware scans, threat scans done and none are detected.

What happened? I love TB but it no longer works.

I tried to update my email password and when Thunderbird prompted me for the new password, I entered it but now I get a message stating that Thunderbird could not connect to the server. I have looked at several other posts describing a similar problem but so far have been unable to solve my issue.

Eric

Bonjour, J'ai 3 comptes de messageries gérés sur Thunderbird. Sur l'un des trois (jeanmarie.doree@outlook.fr), je reçois bien des messages mais il m'est impossible d'en envoyer... alors que sur les deux autres tout fonctionne normalement. J'ai supprimé ce compte et je l'ai réinstallé mais le problème est toujours là (voir pièce jointe). Merci d'avance pour votre aide ! Cordialement, JM Dorée

two errors.

1. the folder the guardian on myemailaddress@gmail.com could not be found, so filters associated with this folder will be disabled. Verify that the folder exists, and the filters point to a valid destination folder

2.ditto....different folder....Linux.org on myemailadress etc etc.

In my research I came across a suggestion to alter the mozilla database : impa.gmail.com ....to....imap.googlemail.com I could not find the mozilla database, so I opened Account Settings/server settings, and changed the server name from : imap.gmail.com ....to... imap.googlemail.com

I need to receive emails to my email address destined for the two folders in question...Linux.org and the guardian....which I will definately have from Linux .org in the next few hours, and from the guardian maybe sometime this afternoon and if not definitely by 7:15am tomorrow morning. The time as i type this is 10:56am...guardian mail has already been received for today

If you have any alternative solution/thought, I will be most pleased to hear from you.

if my 'solution" works then this is definitely a google problem, not Thunderbird......but as usual thunderbird and others will be left to clean up their mess.

Edit to Add: I re enabled the Linux.org filter, and also changed its name from Info@Linux.org, to linux.org....and so far there is not another error thrown when I click on 'run now' in message filters....and the same applies to the guardian. Fingers Crossed !

Specs: Linux Mint 22 (Cinnamon) Thunderbird for linux Mint, mint-001 - 1.0 Thunderbird: 128.3.0esr (64bit)

This must have been posted about before but I couldn't find anything. And in fact I asked here over a year ago and no one replied. Odd if I'm the only one with this issue.

For a year and few months now, I think since the recipient dropdown started showing grey on some listed entries and white for others, thunderbird seems to be often selecting contacts based on some weird criteria that doesn't work well at all.

For example if I type in Julie, yes I see Julie down the suggested list at position 3 or 4, but positions 1 2 3 seem to be completely random selections from my contacts. Since this change happened I've been trying to be super careful with trusting the position 1 offering, which used to almost always be what I was after, but yesterday I sent and email to the wrong person because I didn't check.

If this is supposed to be some great new feature of tbird (which in itself is great), can someone tell me how to turn if off?

I used Linux Mint 21 and exported data to import into Mint22. All the files have been imported but nothing shows up on Thunderbird. How can I install them? Some are very important to me. A couple of screenshots to try and explain better. Any replies to brian/at/casadelpi.casa. Thanks in advance

Bonjour, Je reçois le message suivant à l'envoi d'un mail, et cela pour toutes mes boites:

L’envoi du message a échoué. Une erreur est survenue lors de l’envoi de l’e-mail. Le serveur e-mail a répondu : 6C1HtsAZQgIcw Authentification requise. Authentication Required. OFR203_200 [200]. Veuillez vérifier que votre adresse e-mail dans les paramètres du compte est correcte et essayer à nouveau.

J'ai vérifié les adresses , elles sont correctes. Que faire? Merci Cordialement.

Hi, my IMAP email account is getting full, so to make space, I moved most of my mail, including both Inbox and Sent, to the Local Folder, however there's no size difference showing, according to my email provider's quota meter. My IMAP mail is still just as full. Perhaps I'm not understanding what the Local Folder is. I thought this meant I could have mail offline but still accessible. Could anyone please help me understand this, and also please tell me if there's a way to keep my mail accessible and readable from within Thunderbird while keeping it stored offline so that it's removed from my IMAP account. Thank you!