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I have settings from Greenby to set up server connections for a new account. They are validated by thunderbird but, after, entering my greenby password, generates the error, below, which greenby claims is a thunderbird problem.

"Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI] Show less

Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI]"

Now my greenby password works on their systems

Now I'm very new to Thunderbird so not familiar with the commands

Any one any ideas ?

As of Aug 23rd, Firefox no longer connects to the internet (not site-specific) with this message: Unable to Connect. All other browsers work with fast loads. FF has been incredibly slow loading pages for weeks now but it would eventually connect until today. It is not a network/firewall issue as I've checked to make sure all was set correctly. I have cleared cache, turned VPN off, refreshed app, uninstalled/reinstalled and nothing has changed.

If I find the same tomorrow, I will just have to stop using altogether and choose another default browser as there is no point in a browser that is slow and unreliable. It's a shame since I've been using FF for many, many years.

I have a Windows 11 computer using Thunderbird which has been working fine until last email received was 19.30 UK time on Sept 14. Now Thunderbird will not send or receive e-mails.

Talktalk webmail is working fine via browser.

I have checked all incoming and outgoing server settings and they appear correct. However, when I test server connections, they now fail with error message.

I have checked Windows firewall OFF for 5 minutes, but no change. I have added Mozilla Thunderbird to permitted apps within Windows firewall - again no change. I do not use a VPN.

After years of using my TalkTalk.net account, nothing seemed to have changed, but suddenly today, all messages stopped. The message received is "Could not connect to server Thunderbid. Connection refused. Yet, I can receive the TalkTalk emails in my TalkTalk mail account. What could have caused this? Any advice would be much appreciated.

Hi, I'm using Thunderbird okay for my Gmail account, no probs, but, I cannot get my talktalk email account set up on it. The settings are correct, honest! mail, port, password etc. I'm getting back; failed to connect to mail.talktalk.net/153.92.174.230 (port 993) from /193.168.1.17 (port 40740 after 3000ms: isConnected failed: ETIMEDOUT (Connection timed out) It's strange, almost as talktalk isn't there.

Thunderbird suddenly stopped working properly today, 15 September 2026. Webmail for the same email account is working normally: I can both send and receive messages. However, Thunderbird is having problems with both incoming and outgoing mail. • Thunderbird connects to the IMAP server, sometimes very slowly, but then does not retrieve new messages. • Sending a message from Thunderbird fails because it cannot connect to the outgoing SMTP server. • Thunderbird's own update also fails. This has never happened to me before. • I have restarted Thunderbird and also restarted the Mac, but the problem remains. • I have not changed any Thunderbird account settings. The fact that webmail is working normally makes me wonder whether this is a Thunderbird problem rather than a problem with the email service. Has there been a known Thunderbird problem affecting connections to mail servers or the Thunderbird updater, and could these problems be related

How do I access the notification messages so I can post them here? Because there is like 12 or more a day on each machine from multiple accounts.

I got one that mentions restricting the number of concurrent threads using the IMAP interface but no clue as to how to restrict TB from making multiple requests from multiple accounts to the same server at the same time.

Gone from Chromecast to Firefox and had to do this through my phone, now says check signal cable to sorry dunno wat I'm doing but have wifi but only working for the main living room? Thanks if u can help 😁

It was working fine on the new computer until yesterday. Now I get a pop-up box that says: ' Unable to connect The connection was refused when attempting to contact localhost.

The site could be temporarily unavailable or too busy. Try again in a few moments.

If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure Thunderbird is permitted to access the web.

I can no longer use outlook due to being a basic BT email account user. Thunderbird recognised my account. But now says can find server. It may be my password is wrong in outlook, but it is so long ago, I have no idea of my original password. I’m using the BT Mail app on my iPad and iPhone which works fine, but want my past and present emails on my laptop as well. I’m using windows 10. Any help??

Almost anything I try to do with Thunderbird, even replying to emails requesting advice, I come up with errors, such as:

Sorry, you have been blocked

You are unable to access thunderbird.net

upstream request timeout

upstream connect error or disconnect/reset before headers. reset reason: connection termination

when i work in any web page and i try to back to previous page browser disconnect the page and shows loading page error (problem loading page). Is this a browser problem or any network issue , after update this shows multiple times when i try to go to previous page . 'problem that i face ' Server Not Found

Firefox can’t connect to the server at scholarship.up.nic.in. What can you do about it?

   Check to make sure you’ve typed the website address correctly and try again in a few moments.
   Check your network connection.
   Check that Firefox has permission to access the web (you might be connected but behind a firewall).

Learn more… Try Again