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I am trying to access certain HTTPS websites and some of them show PR_CONNECT_RESET_ERROR in Firefox. This error is not present in Edge or Chromium.

Here's what I've tried (none of these works):

• DNS over HTTPS turned off
• Uninstall all add-ons
• Reinstall Firefox
• Create new profile and set it as default
• Delete/rename certs.db in the Firefox profiles folder.

The only fix that works is to use Troubleshoot Mode every time I visit these websites which is not practical. Any ideas on what could be the problem?

I don't know if this is relevant but one of the websites that does not work is https://alexan.com.ph/

With Firefox 135.0 i cant reach google.com but google.se i can.

I make daily images of C: and today i managed to go back one day to 2025-02-06 but accidentally chooses 2025-01-06 and with the older version of firefox i could reach google.com

I have tried to delete cookies. DNS over HTTPS off. No proxy in connection. Add-ons off but to no avail.

In Firefox, and only in Firefox, I get 'Failed to verify your identity' on these sites. I have updated MacOS and Firefox, rebooted, tried a different DNS, and disabled all of my extensions. With extensions disabled I don't get the error, but the login site won't accept my login at all. See the attached image. I can't think of anything else to try.

On January 21st 2025 I changed my Spectrum account password. Almost immediately Thunderbird could not log into the spectrum maintained "mail.twc.com" server. When I called Spectrum support I was told the old Spectrum use of separate passwords for SMTP and IMAP was changed to use the same password as the spectrum web page which is now the same for all spectrum logins, a "one password to rule them all" scheme in November 2024. I changed the passwords in Thunderbird for IMAP and SMTP, but it still will not connect. If I do an auto populate attempt, the server actually responds with the correct setting so I know I am reaching the server. After five days trying to resolve the issue with Spectrum I was told this is a know issue with Thunderbird and it is not the server but the third party application. It is bad enough they reconfigure things like this without disclosing it. It baffles me that the changes they claim were made in November 2024 only make themselves known when the service stops working nearly three months after the change and only when I changed the web site password. Anyone know how to solve this? Thank you so much in advance.

I have been using Thunderbird for many years. I have 4 accounts that have all been set up and working fine. This morning the 2 yahoo.com accounts stopped working. I logged in to the impacted accounts using a web browser and password just fine. I then updated Thunderbird to 116.0 to see if that would fix the problem, but it did not. The outlook and gmail accounts are working fine, for now.

When Thunderbird attempts to download mail for the yahoo accounts, I get a large pop-up window with "Edge: Too Many Requests". The pop-up window is blank except for that error message. I get the small pop-up with the Authentication Failure message. Sometimes I get Retry, Enter Password or Cancel. But I never see a window that will allow me to enter my password.

I can send/receive mail from the accounts while logged in via a browser but authentication fails within Thunderbird.

UNABLE TO RE-ADD MAIL ACCOUNTS TO THUNDERBIRD For the last three or four months I have been getting two separate messages in the bottom of the screen when opening Thunderbird on my laptop. "GMAIL settings are out of date" and "Yahoo settings are out of date". Then, a about a month ago when I opened Thunderbird I noticed that it was trying to download almost 3000 Gmail emails. I had always believed that only new Gmail messages would download on start up? Whilst this was happening it was impossiblle to do anything on my laptop as I had limited internet access. The only way I could see to stop this was to delete my Gmail account from Thunderbird. When I opened Thunderbird I continued to get the messages "settings are out of date" for each of my mail accounts. So I deleted my email accounts from Thunderbird with the intention of re-adding them. I then downloaded and re-installed Thunderbird to ensure I was on the latest version. I then tried to re-add my mail accounts, letting Thunderbird find and load the correct email settings for each account but I now get an error message saying "Unable to Log In at Server. Probably wrong configuration, username or password". Refer to attached screenshot. I can log in to my Mail Accounts OK using Firefox so I know my username and password are correct. I also tried adding my mail accounts manually in Thunderbird but I contiue to get the same message. I am unable to add my mail accounts to Thunderbird and I have run out of ideas regarding diagnosis and resolution. I need help please.

I have the Android T-bird app on my Google Pixel 9.

I am having constant problems with it not syncing.

This morning, when I swiped down, the kept spinning but did not connect. When i tapped the sync icon at the bottom left of the screen, nothing!

Nothing changed after rebooting the phone, which BTW takes almost twice as long as the reboot on my previous Samsung phones.

I have now uninstalled and reinstalled, and imported my settings using the QR code on my desktop. It imported my accounts, but asked me to sign in or sign in later. There is no link for signing in immediately, and sign in later does not allow any sign in opportunity.

I now have no emails imported to the app.

Any help would be appreciated

Since upgrade to 128.10.1esr, list of emails in local folders is visible, but cannot view email contents, cannot forward, cannot reply, cannot move, cannot delete.

IMAP folder functionality is all OK.

Occurs in both 64 bit and 32 bit versions of 128.10.1esr

After this occurred on 64 bit machine, we had 32 bit two machines running a previous version of Thunderbird that were still able to access (read, forward, delete, etc) emails in the same local folders (local folders are on network and accessible to 3 different computers).

After upgrading one of them, access to emails on local folders broke on that one, but still working on remaining machine running older version.

This means it is not corruption of local folders (e.g. folder repair and .msf deletion don't make any difference).

It seems to be a problem with this version since update.

How can this be fixed, do we need to wait for another update?

After working fine for years, Thunderbird stopped receiving email from my POP accounts a month ago and I haven't been able to get it to work since. After weeks of experimentation and frustration, the only way I can get TB to download POP mail is to install and run it in Windows Safe Mode with networking. However, once installed in Windows Safe Mode, TB run in Windows normal mode will successfully send messages from each account.

It would take pages to describe everything I've tried, so I won't. The results of all the tweaking and updates is the system specs below.

OS: Windows 10 Home (x64) version 22H2 AVS: BitDefender Email: Thunderbird 102.15.1 Add-ons: None Theme: Default Accept cookies: Always Exceptions: (added any that seemed even remotely associated with issue) https://accounts.google.com https://mail.google.com https://www.googleapis.com https://pop.gmail.com https://pop.gmail.com:995 https://smtp.gmail.com https://smtp.gmail.com:587 https://pop.centurylink.com https://pop.centurylink.com:995 https://smtp.centurylink.com https://smtp.centurylink.com:587

Saved passwords: mailbox://pop.centurylink.net (mailbox://pop.centurylink.net) Oauth://accounts.google.com (https://mail.google.com https://www.googleapis.com/auth/carddav https://www.googleapis.com/auth/calendar) smtp://smtp.centurylink.com (smtp://smtp.centurylink.com) smtp://smtp.gmail.com (smtp://smtp.gmail.com)

Hardware acceleration: Off

Gmail POP server: pop.gmail.com Port: 995 Security: SSL/TLS Authentication: Oauth2

Gmail SMTP server: smtp.gmail.com Port: 587 Security: STARTTLS Authentication: Oauth2

CenturyLink POP server: pop.centurylink.net Port: 995 Security: SSL/TLS Authentication: Normal password

CenturyLink SMTP server: smtp.centurylink.com Port: 587 Security: STARTTLS Authentication: Normal password

I'm at a total loss as to what I've missed or where to look next. I would appreciate any help.

Thunderbird, quite suddenly, stopped getting my email; Both on my account and my wife's account at the same ISP. I spent more than two hours on the phone with the ISPs help line trying to resolve this issue. They also use Thunderbird at their help desk, and the agent I talked to was familiar with your program. She (the agent) was not able to replicate the issue on their system. We then tried to set up a NEW email account. I carefully entered all the info needed for a new account, following instructions from the agent, then hit the 'Test' button. I got the following message onscreen: "THUNDERBIRD FAILED TO FIND SETTINGS FOR YOUR EMAIL ACCOUNT" The answer to the original issue suddenly became very clear - Thunderbird cannot, or refuses to, connect with the email server, therefore NO EMAIL. We tried everything in her toolkit to resolve the problem to no avail. We finally tried UNINSTALLING Thunderbird (and the Maintaince program). Once Uninstalled, I used the Registry Tool on CCleaner to remove any entries in the registry referring to Thunderbird (there were several), then restarted my computer. I then downloaded and installed a totally NEW Thunderbird program. When I ran the Thunderbird again, I found all my account(s) info was still present, and Thunderbird was still unable to find the server. I'm at my wits end trying to resolve this issue, and REALLY HATE to go back to Microsoft OUTLOOK to get my email. Anybody got any ideas??? Any help would be greatly appreciated. (Signed) Proteus

After years of working flawlessly today I turn on my computer, start Thunderbird and see the following Alert pop up-

"An error occurred during a connection to pop.bizmail.yahoo.com:995

Peer reports incompatible or unsupported protocol version

(Error code: ssl_error_protocol_version_alert)"

I click on OK and the same message pops up another 3 times (Thunderbird is managing 4 email addresses for my business, hosted on Yahoo email).

I called my website host and they tell me it is nothing on their side. No changes were made overnight.

Where should I begin?

The font size in "Manage Bookmarks" is way too large, both in the sections list menu on the left and the list of bookmarks. I checked my userChrome.css file as well as the layout.css.devPixelsPerPx entry in about:config and there's nothing there to explain why only the "Manage Bookmarks" text is so large.

It's possible I changed a setting somewhere that's causing this. But I'm stumped re: what setting might be controlling the font size in only that UI. All other Firefox text sizes are good.

Thanks to anyone who knows where I should be looking

Firefox 134.0.1 (64-bit) Windows 10

I occasionally have problems with Thunderbird insisting that posts in my frequently visited newsgroup are expired when they are not. Previouly, I've been able to resolve this problem by simply unsubscribing from the newsgroup and then subscribing again. But today, when I tried that technique, Thunderbird told me that there were no messages at all in my newsgroup. This is flat-out wrong because the newsgroup is quite active. Right-clicking and choosing Get Messages did NOT change the situation.

Then, to add an extra layer of aggravation, I added a second newsgroup to my subscriptions, one for Thunderbird itself, but it was empty. I deleted that folder and then unsubscribed to my other newsgroup and tried to subscribe again but now the "Manage subscriptions" button shows me no newsgroups whatsoever!

I am beyond frustrated by this nonsense. What do I need to do to get "Manage subscriptions" to show me the thousands of newsgroups that exist and how do I make "Get messages" to show me the messages currently on my newsgroup?

I'm using Eternal September to access Usenet. My operating system is Windows 10. The version of Thunderbird I'm using is 128.8.1esr (32-bit).

I am not getting my email on Thunderbird. I am getting this message: "Could not connect to server pop3.optusnet.com.au; the connection was refused" Could you please help with this? Kind regards, Luke

I've been using Thunderbird for years to access my gmail account through my ieee alias. Sometime after 4/2/2025 my login fails with the message "Login to server imap.googlemail.com....failed". I've tried changing the imap server to "imap.gmail.com" but get similar results. For some reason, it appears that something changed on 4/3 that prevents a successful login to the gmail server from Tbird. I have both Tbird and gmail configured for OAuth2. Update: As it turns out, following the steps in this link resolves the issue: https://support.mozilla.org/en-US/questions/1375558

So there was a problem with AOL today and I'm using Thunderbird for my Verizon account now AOL is back up and running but on my computer Thunderbird will not let me log in to The Host keep saying it's failing?

All my email accounts are hosted at siteground. I recently created a new domain, website, and two email addresses there. Siteground support tested the new email addresses and said they work fine. But when trying to set up these new email accounts in Thunderbird - 128.5.2esr (32-bit) - I keep getting error messages. I know the passwords are correct because I checked them in Settings. After the first step in setup, I always get "Configuration found at email provider". If I click "Done", I get "Unable to log in at server. Probably wrong configuration, username or password". If I click "Configure manually" and then "Re-test", I get "Thunderbird failed to find the settings for your email account".

I tried to connect to an existing Google-Mail account via 'new', 'existing mail account' etc.. Finally a Google-Login-Window appears. After inserting the username Google responses with a message, that my browser does not support javascript. However, both in thunderbird and in firefox javascript is enabled.

Sincerely Yours Stefan Holzreiter

My thunderbird has not been able to connect to my gmail account. I don't get any error but I do get the notification "connection to server imap.gmail.com timed out".

I have checked all the settings for Thunderbird and Gmail as specified on the Mozilla web site and have re-installed Mozilla with not change.

Any ideas on how to fix this please?

Regards Roger