Recently tried to switch back to using Daily, but now I get authentication errors each time I start the program. It's always the following three errors in sequence: Authentication failure while connecting to server imap.gmail.com. The certificate for imap.gmail.com does not come from a trusted source. Non-overridable TLS error occurred. Handshake error or probably the TLS version or certificate used by server imap.gmail.com is incompatible.

I've tried getting rid of all of my saved passwords and even completely getting rid of the account and re-adding it. I've also tried completely disabling my VPN's service in Windows to see if that was somehow affecting it, but nothing.

Why can't I open?

https://water.weather.gov/ahps2/hydrograph.php?gage=porm2&wfo=lwx

This is what I get: Server Not Found

Firefox can’t connect to the server at water.weather.gov What can you do about it?

Try connecting on a different device. Check your modem or router. Disconnect and reconnect to Wi-Fi.

Learn more…

This only recently started happening. This has been tested on 3 different computers. Windows 10 Pro on all three.

With VPN on: Bluemail works fine.

Thunderbird can connect and download messages, but when I try to send a message, it gives an error.

With VPN off:

Bluemail and Thunderbird both work fine.

Drgan Maric, 74, Belgrade, Serbia. This is my self-taught English.

I use Thunderbirad for years, including small donation when I start to use it. Since a few days I can not open WebMail from cPanel of Namecheap,

Nothing is changed in both servers and ports. In Account Settings Outgoing Server has an option to TEST connection for server. Result failed.

An Attachment is an immage of TEST and RESULT FILED.

In this age, with broken spine and almost immovanle, it makes me very frustrated. Coud you plase reaolve this issue and make Thunderbird to work properly and peace in my mind,

Issue Summary: When disconnecting from a corporate Cisco AnyConnect VPN on macOS, Firefox completely loses its internet connection and throws network errors. Other browsers (Chrome, Safari, Edge) continue working perfectly on the home network. Standard troubleshooting steps—like clearing Firefox's DNS cache, changing proxy settings to "No Proxy", turning off DNS over HTTPS (DoH), and flushing system DNS—do not resolve the issue.

Root Cause: Cisco AnyConnect locks low-level socket configurations and routing rules within the active Firefox user profile (prefs.js). Even after the VPN is disconnected, Firefox remains bound to the dead corporate pipeline, a behavior that standard settings menus cannot override.

Proven Solution: The only way to clear the corrupt VPN socket locks is to completely reset the internal profile architecture:Open Firefox, type about:support into the address bar, and press Enter.Look at the top right of the page and click the "Refresh Firefox..." button. Accept the prompt. Firefox will close, securely back up your bookmarks/passwords, generate a fresh profile, and restart.Internet access will instantly return to normal. (Note: You will just need to reinstall your extensions afterward).

I'm on a private home network with an internet connection. When I try to use Firefox it displays a message saying "You must log in to this network before you can access the internet".

Many websites, e.g. Amazon, won't load and an 'Open network login page' button is shown. When I click this it takes me to a Mozilla page talking about Captive Portal, but there's nothing about how to stop this happening and access those websites.

Other browsers, e.g. MS Edge, or Brave, have no problem access these websites.

How do I fix this problem?

Everything has been fine for several years but this morning I now get error: TB could not connect to server mail.twc.com, the connection was refused. Spectrum says everything is good on their end. What do I have to do to "fix" Thunderbird? I can't send or receive any emails from 5 accounts with Spectrum and the emails are there when I log in at WebmailSpectrum.net..

As described, firefox is entirely not working for any website. This happened after my computer crashed (hardware problem) and I restarted twice, but could be related to a firefox update that was waiting for me to restart.

Hello. Impossible to connect to an existing Google account. Neither to the "full" account, nor to the Contact list nor to a Calendar of an existing account. Neither to a "private" account, not to a "workspace".

When trying to connect to a Contact list, after the Oauth window and the authorisation to share data from Google accounts, the app answer "Connexion impossible" (I am a French user).

When trying to connect to Calendars, Google's window asking authorisation to share data comes back after clicking "authorise".

I have set up Push Notification and have a small blue icon at the top left of the screen and I will get notifications but then I notice it has gone quiet and the little icon has disappeared so I have to close Thunderbird and then restart it to get the icon back at the top of the screen. Any suggestions please as to what is causing this.

I am receiving "The page isn't redirecting properly - Firefox can't connect to server" error messages. This happens on nearly every website repeatedly for the last six? weeks. It does not happen in other browsers i.e. Chrome. I click the "Try Again" button in the Firefox error msg popup window over and over, 3-14+ times, to get past the error msg and access the site. When I try to login to many sites I am kicked out to the same error msg. Also kicked out of sites randomly when trying to navigate to another page on the same site. I had Claude AI take me step-by-step through all of the trouble shooting and adjustments to various settings. All of my extensions are off. I have had my ISP re-initialize my modem and I've run antivirus scans, still the problem persists. (Strangely YouTube does not have these problems) I love Firefox. I've got it setup just the way I like it. I have been using it for 20 years and during those two decades Firefox has been stable and had only minor glitches. I do not want to change my browser. Chrome feels clunky to me. I'm attaching three representative screen captures of the error msgs. Looking forward to anyone's help.

I've used Thunderbird for a few years, worked great. No Thunderbird setup option has been changed for a few years. Last week, it failed, could not receive email. The host says they checked and found nothing wrong there. But now when requesting email, it says Connection To Server was Reset., and repeats that every few minutes (every new try I assume). I Sent email from me to myself, and web email there sees it is received up there, so STMP works, but not POP.

Host support said to remove passwords to reinitialize them. I did, but it does not ask for password and still repeats continual reset (does not mention password, and so no way to reset password now, seemingly does not get that far). They said to remove profile file popstate.dat (file only contains server connection and my email address) and I did, but no change. Still continual Connection to Sever was Reset, repeatedly, every try I reloaded Thunderbird, no help. I tried Thunderbird Troubleshooting, and saw no change but don't know what to do there. Host thinks all is correct there. Server connection is Inmotionhosting Secure303. FWIW, am using Microsoft Windows 11 virus security. Could it be a security certificate problem? It gives no clue.

I see many of same question about Connection Reset here, but no answers. Surely someone knows how to fix POP Connection to Server was Reset?

What does Connection to Server was Reset mean? That is all it says, but every time. Just cannot connect? Any help will be appreciated.

All of a sudden my comcast.net email is no longer accessible through Thunderbird,it claims I'm not using the correct password, even though none of the settings have changed. I can still access my email through webmail, using the same password. What's happened? and how can it be corrected thank you

Setup: macOS Tahoe (26.4) and Firefox 149.0

=

Behavior: Out of the blue this morning, every website I try to visit in Firefox returns "Looks like there’s a problem with this site". Every other browser works fine.

Things I've tried, that haven't fixed it: - Ruled Out DNS: Sites like 1.1.1.1 and my home router's IP return the same issue in Firefox, but also resolve in any other browser. - Firefox Safe Mode: no fix - Deleted All Settings, Reinstalled Fresh: - Removed the Firefox App, deleted:

       - ~/Library/Application\ Support/Firefox
       - ~/Library/Caches/Mozilla
       - ~/Library/Caches/Firefox

...and then downloaded and installed 149.0 fresh. - Refreshed Firefox (via [link] - about:preferences (toggled between FALSE and TRUE, testing each time) via this YouTube video

- network.dns.disableIPv6

- network.dns.disablePrefetch
- network.dns.disablePrefetchFromHTTPS
- network.dns.disable

....and in desperation, I checked my Mac for Malware (clean)

I'm at a complete loss: every other browser works, but Firefox is a 100% fail for all websites. Any thoughts?

Update: Something fixed itself, and it is currently working. Please close this thread for now.

Hi, Thunderbird updated this morning, and now I cannot access my email. I've rebooted, confirmed my server settings, and it has not fixed it.