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Hello community. My company decided, right before Christmas, to force-migrate all e-mail addresses from the functioning old servers to "Exchange Online", which not only made the web-browser based access more complicated, but also required changes in Thunderbird. While they provided instructions, which I slavishly followed (despite being usually rather hand around the computer), I still cannot send e-mails with my work address - they get timed out. My company IT are notoriously unwilling to help with issues on the private computer and have recommended even beforehand to from now on only use the web-based access to avoid trouble - which is laughable, for me, as I need my e-mails offline as well. So before harassing them more loudly, I wanted to make sure it's a fault on their end not on mine.

Some details: New server is outlook.office365.com, SMTP port 587. Security level is STARTTLS, authentification OAuth2. These are the changed options requested by the company IT. The window popping up when trying to send a message asks me to chose a certificate for athentification and suggests "Adobe Conetent Certificate 10-7". Neither installing this manually, accepting, or changing something under "further options" changes the outcome that the message will be timed out. As my private e-mail also uses port 587, and it still works perfectly normal, this port is not generally blocked by the windows defender or antivirus (I use Kaspersky).

Maybe someone has an idea what it happening here? Or knows if to slve it by installing a particular different certificate?

Google search no longer works on Firefox. Other browsers have no problems. Changing the default search engine on Firefox works (eg Bing), BUT. It can now find Google Maps, but Google Maps cannot find a location, because it uses a Google search. I tried the fix in about:config, but it had no effect.

All of our "read" emails, --from all of our accounts -- have suddenly disappeared. All of the folders and subfolders are still present. We still get new email, but as soon as we read it, it's gone. We have had these same email accounts for years and have not made any changes. In Account Settings --> Synchronization & Storage --> "don't delete any messages" is checked. "Read" messages are still on our server.

So, 1) Why did this happen? 2) Is there any way we can get our messages back in Thunderbird?

Firefox can't connect to my local weather station at "http://192.168.33.11:8998/gauges.html" but chrome works just fine.

This is the error message I get:

The connection has timed out -- The server at 192.168.32.11 is taking too long to respond.

Thunderbird recently upgraded (?) to Version 15 on my Windows 10 laptop. Since them, when I go to look at the "Trash" folder, I get the message: "Unable to open the summary file for Trash on username@gmail.com. Perhaps there was an error on disk, or the full path is too long." I was able to fix it temporarily by restarting Windows 10, but the error is back a few hours later.

Ok, last week I migrated my Verizon Email to the new AOL/Verizon email set up. All went smoothly. I was sending and receiving no problem. All of a sudden, I am not sending or receiving. I can get mail from the AOL.Mail site, but can not get from Thunderbird. I have a G.mail Acct using Thunderbird and it works fine. Any idea why the new Verizon/Aol might be stumbling over Thunderbird? When I try to get mail it just hangs, when i try to send i instantly get this message...Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.verizon.net was lost in the middle of the transaction. Try again.

I have three email accounts and need to add a fourth, but haven't been able to. When I click the "create a new account > email" button a screen comes up with two buttons, and neither button works. They're 'clickable' in that they change color, but there's no way to move away from this screen and neither button brings up a new window. Once I get here I have to force quit the application to get off this screen.

I'm on mac os 10.12.4, using Thunderbird 52.1.0. I updated thunderbird, uninstalled and reinstalled, and no luck. Any thoughts?

I have used TB in Linux Debian for several years. Three days ago it was fine. Now suddenly when I try to get messages from my Hotmail account, I get a black window saying something to the effect that the server may be offline. (It disappears too quick to be able to quote it accurately.) But the messages are downloading OK to my smartphone (not using TB). And I have connected directly to the Microsoft Outlook server, and my Hotmail account is up to date. It seems to be a TB problem! I reset the Hotmail account password in TB as suggested on one of the TB sites, but to no avail. I also disabled my firewall, again to no effect. Please can someone help? (Incidentally, when reseting my Password, I stupidly failed to set the option to record it in the TB Password Manager, so it no longer appears there. I would be grateful also to know if the pw. can be added retrospectively to the PW Manager in TB, and if so how it is done.) Tom.

My ISP, Cox, sent me a message that I have to change my POP server settings from:

port 110, Connection security: None, and Authentication method: Password, transmitted insecurely

to:

port 995, Connection security: SSL/TLS, and Authentication method: normal password

When I do this Thunderbird will not retrieve any new messages. The same changes work ok on two android devices, so I can see from them that there are new emails for Thunderbird to get, it's just not getting them. I tried changing one of my accounts back to the port 110 settings and that account now works again.

I tried contacting Cox about it but they stated that they don't support Thunderbird and referred me here.

I'm on Thunderbird 52.5.2 32 bit.

I get error 5.1.1 when I try to send an email, see below for my my smtp settings and the error msg. To the best of my knowledge I have changed nothing but update to current version. attglobal.net is my email provider, windows 10 build 16299, norton 22.11.2.7, Thunderbird 52.6.0 32 bit,

Suddenly, I could not send emails. This has happened before, but quite some time ago, so I can't recall how I solved it back then. I went through the “Cannot Send Messages” https://support.mozilla.org/en-US/kb/cannot-send-messages steps and discovered that there was no entry line at all for smtp outbound when I checked "Saved Logins" to see the passwords. Mailbox inbound was there, but not smtp outbound. It had been there before without doubt.

The original error message said that I needed to enter a password, which, when I checked as I described, was missing. So trying again, I entered the password and checked the box that lets the system manager remember it. Now an smtp outbound line appeared in "Saved Logins," but I still could not attempt to send a message without an error notice that declared failure

This error message I kept getting was this one:

  Login Failed

  ?  Login to server outbound.att.net failed

  [Retry]     [Enter New Password]     [Cancel]

(As you can see, the underlying email service is from the unfortunate ATT/Yahoo, the second half of which is known by the lovely name "Oath" (visions of writhing fanatics swearing allegiance at a blazing altar), which I am seeking to replace. Meanwhile, I must have working email service from it through the heretofore wonderful client Thunderbird.)

Imagine my surprise when I happened to check the "Sent" box and discovered that these messages all were listed as having gone out despite the failure message I was receiving, but given that tests I sent to myself were not received, these must have been on the order of "false positives." I tried the steps in that "Cannot Send Messages" article and cannot imagine what is wrong.

What am I missing?

Thank you.

Hello,

After upgrading my Thunderbird install to version 60.2.1 on my Xubuntu 18.04 machine, I cannot access my mail anymore, because there seems to be a problem with passwords.

Symptoms:

- When starting Thunderbird, I get an "Enter your password" box for each of my accounts even though I had my passwords saved.

- When I go to Preferences -> Security -> Passwords -> Saved Passwords, the list is empty.

- When I try to enter a password and save it, it does not actually get saved and Thunderbird will ask again soon after.

- The following line is logged to console a whole bunch of times:

JavaScript error: jar:file:///usr/lib/thunderbird/omni.ja!/components/crypto-SDR.js, line 179: NS_ERROR_FAILURE: Couldn't decrypt string

Other findings:

- Downgrading Thunderbird to 52.7.0 fixes the problem. The old saved passwords just reappear again and Thunderbird has no problem logging in.

- Starting Thunderbird 60.2.1 on a Windows 10 box with exactly the same profile folder works fine. It can read the passwords and access my mail accounts.

Can you please tell me what to do to fix this, so I don't need to keep using an old version of Thunderbird just to access my mail?

Thanks,

Folks:

I am running 64-bit Windows 10 Pro ,version 1511. I had been running Thunderbird 52.9.1 without any problems whatsoever. A few days ago, Thunderbird upgraded to 60.3.1. Thunderbird became unstable and unusable immediately upon start. Taskbar and Process Explorer showed that the program was running, but the window would not stay open or even stay stable.

I was able to use System Restore to revert to the previous version of Thunderbird, and although the calendar functionality is gone, it seems to work fine.

Any help you can provide would be greatly appreciated.

Thanks!

I have recently added a Microsoft exchange account to Thunderbird. I am able to connect to and receive emails through imap, but I cannot send emails. The error I get is a 'Login Failed' error with the message 'Login to server smtp-mail.outlook.com failed.' but I have double checked that my login information is correct (and reset my password and tried again). I can also happily send emails from the webmail and from a desktop copy of Outlook. I have tried all the suggestions in the 'Cannot send messages' troubleshooting article with no success.

My outgoing server settings are:

Server Name: smtp-mail.outlook.com

Port: 587

Authentication method: Normal password

Connection Security: STARTTLS

This is a Microsoft Exchange email, I am running Thunderbird 52.9.1 on Windows 10. Any suggestions on what the problem might be?

When using built in search (google default) -- browser stops responding. Shows Firefox new tab background when loading the search. Issue resolves on Firefox close and re-open. Paste and go, creating new tabs also fail with same 'new tab background' displayed. Issue is intermittent but appears often, at least 4-5 times a day.

Tested same sample search with google chrome in same time period, no issue.

Issue appeared around the V99 update. Fix would be greatly appreciated - exiting and re-opening browser, dropping all tabs to reload is a serious usability issue.

I just started having an issue while watching Live Streams on Youtube with FireFox. I'll load the live stream and it will run for about a minute then it will switch to the streamers previous recorded stream. I opened Youtube on my iPad and on Edge browser and the Live stream keeps playing the live stream but on FireFox it only lets it run for about a minute before flipping the playback to the previous recorded video of that streamer. I tried clearing my cache for Youtube and I have no extensions running. I have Youtube Premium and run no adblockers. I have also tried safe mode but the problem persists.

Any idea what could be happening?

Firefox continually refuses to open, and I have worked all the suggested solutions once again. I used it for a few hours this morning, switched briefly to Chrome. Went to go back into Firefox, and it wouldn't open again. Did all the work arounds....uninstall, reinstall, even system reset to the previous day. Still won't open. I am so disappointed at having it behave so unpredictably. I sometimes sense it is related to updates....almost afraid to reboot my computer sometimes because it will not open afterwards. My recent install attempt appears among the public users, which is not the case as mine is a private PC. The Mozilla Program itself, however loaded to the 86 bit program files. Not at all sure to proceed at this point.... getting forced over to Edge it feels like....

I am trying to reach an internal company website ([URL]), with a certificate chain rooted in a company certificate authority. This works fine in Chrome, and worked in Firefox on my previous computer. But i recently got a new machine, and something somewhere is not quite right. I get an error message looking like this (between the ~~~s):

~~~ Someone could be trying to impersonate the site and you should not continue.

Web sites prove their identity via certificates. Firefox does not trust [URL] because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates.

Error code: SEC_ERROR_UNKNOWN_ISSUER

View Certificate ~~~

If i click on the error code, i get these details:

~~~ [URL]

Peer's Certificate issuer is not recognised.

HTTP Strict Transport Security: false HTTP Public Key Pinning: false

Certificate chain:

[certificate]

[certificate]

[certificate]

~~~

If i click 'View Certificate', i get a chain of three certificates:

1. Subject common name = [certificate]
2. Subject common name = [certificate]
3. Subject common name = [certificate]

If i go to Settings > Privacy & Security > View Certificates > Authorities, i can find both the [certificate] certificates. As far as i can tell, they are identical - i can open the certificate from 'View Certificate' and the corresponding one from the certificate manager and flip between tabs, and all the details are the same.

I am using Firefox 120.0, via a flatpak, on Ubuntu 22. I have given the flatpak access to /etc/ssl/certs, where my company's internal CA certificates are located.

To me, this seems like it should all work. The server has a certificate signed by an internal CA, which is signed by another internal CA, and both those internal CA certificates are in my certificate manager. So what is going wrong? Is there any way i can debug this?

Hi,

I am using Firefox for Linux, and whenever my yubikey is plugged in, firefox will start bothering me for a pkcs#11 password. It always happens on start-up but it gets relentlessly annoying if I happen to be on a site which potentially utilizes certificate auth, which I do not use this yubikey for.

I do however use it for 2fa, which does work perfectly fine.

How do I permanently stop whatever Firefox process keeps bothering me about this PKCS#11 password for functionality that I never use?