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I can't read my mails and every time i open Thunderbird i get told that my registration failed and i have 3 Options to choose "try again", "enter new password" and "cancel". Doesnt matter ehich one I choose i can't read my mails or receive any and the same message and the same options pop up again.

hello, https://addons.thunderbird.net gives error 502 Bad Gateway.

[[Thunderbird Addons Website 502 Error|Zach Rice asked the same question on 17/march/25, 12:28 PM]] and got an answer from James 3 hours later. Am I living in an alternate reality ?

at least 2 times a day firefox looses internet connection, and my internet is very strong and right next to my laptop, this is a problem i have had the last few months, but getting worse

For 3 days now I have been unable to connect thunderbird to microsoft outlook. I have all the latest settings checked online with microsoft and it keeps failing... any suggestions on how to overcome this? Thanks

NOTE: I have marked this as "Solved" because I figured out the problem described below, and I fixed it. See my following message here for a description of my solution.

Original message starts here ...

I'm using Firefox 144.0 under Debian Linux. I've used Firefox on this machine for years with no problem. Firefox can easily connect to literally thousands of web servers on the internet, both via HTTP and HTTPS.

But now, I'm having an issue:

I started running a web server on the same machine that Firefox is running on. This server only listens for non-HTTPS connections on port 80. I am not using any proxy server with Firefox.

I can easily and directly connect to my local web server's pages from my local machine from Chrome, w3m, curl, and direct telnet connections to port 80 ... all of which are addressing the publicly accessible domain name for my local web server. However, However, Firefox refuses to connect to any URL's on my local machine, and it gives me the following explanation:

Unable to connect

Firefox can’t establish a connection to the server at [ my server's domain name ].

   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 that Firefox is permitted to access the web.

In Firefox, I have all auto-forcing of HTTPS disabled by means of Don’t enable HTTPS-Only Mode turned on.

I get the same error in Firefox whether I connect via a URL like "http://MYFULLDOMAINNAME" or a URL like "http://AAA.BBB.CCC.DDD", where "AAA.BBB.CCC.DDD" is my machine's publicly accessible static IP address and "MYFULLDOMAINNAME" is the long-standing, publicly accessible domain name for my machine ... both with and without a suffix of ":80" on the supplied URL.

And again, all other browsers on my machine have no problem whatsoever connecting to my own local web server on this same local machine of mine using those same URL's.

And all browsers (Firefox and otherwise) that are running on other machines all over the internet have no problem connecting to that same web server via the same URL's that I described above

Also, I have no firewall rules on my machine which would block access to my own machine's port 80.

What could be causing this error in Firefox, and what might I be able to do to fix it?

Thank you very much in advance.

UPDATE: Just a bit more information. Looking at the web logs, I see that Firefox's request never even reaches my local web server. In other words, Firefox itself is not even trying to make a TCPIP port 80 connection to my local web server in the first place

I periodically get a T-bird notification "Server imap.gmail.com has disconnected". If I wait for 30 sec to a minute, the connection reconnects and everything is fine, until it does it again. If it disconnects in the middle of sending a message, the send action will freeze and perhaps, time-out if the disconnect time is too long. Any ideas about this periodic disconnection? I'm using version 128.9.2esr (32 bit) with Win10 pro.

Thanks, Tom Hayes

not connecting to server as of today

Login to server mail.tds.net with username [edited]@tellink.net failed.

Thunderbird sagt, E-Mail-Adresse, Passwort oder Konfiguration seien falsch, Anmeldung am Server nicht möglich, obwohl ich mich über Mozilla Firefox auf dem Vodafone-Server einloggen kann. Was kann ich machen?

Quand l'envoie une PJ avec un compte qui a smtp.free.fr, j'ai le blocage "L’envoi du message a échoué. Le message n’a pas pu être envoyé car la connexion au serveur sortant (SMTP) smtp.free.fr a expiré. Veuillez essayer à nouveau." Si je l'envoie avec un compte qui a smtp.sfr.fr, je n'ai pas de problème ! Je suis en Thunferbird 146.0.1 (64 bits) sur Windows 10. Merci de votre aide.

the msg returned

Hmm. We’re having trouble finding that site.

We can’t connect to the server at marvelsearch.com.

If you entered the right address, you can:

   Try again later
   Check your network connection
   Check that Firefox Developer Edition has permission to access the web (you might be connected but behind a firewall)

i am using a local dnsserver and firefox is connected to it. is this the reason? if so how can i disable this? other firefox features are working beautifully.

I recently installed Thunderbird on Debian 13 and I wanted to use it as my default email client. I tried to connect it to my university account and even though I'm confident the credentials are correct I'm getting the "Unable to log in at server" error. I also want to note that I'm getting the success message saying "Configuration found at email provider".

Hello,

My father has a random issue with one of his email accounts. Context: Windows 11, TB 146.0.1. In TB, 5 mail accounts are configured, all IMAP, on 4 different providers.

All accounts work perfectly except the first one, which is also the default account. This account and the second account are both on my father's Internet provider. The configurations of both accounts seem identical (I checked more than once), except obviously for the name and password. On the first account (which is unfortunately the one my father uses most), connexion is often refused, and TB then asks to retry or enter a new password. Retry and reentering the password fail to solve the issue. When the connection to the first account fails, the second account (for the same provider) always works. Some time later (usually at least several days later), the first account will work again, without any obvious reason.

I tried exiting TB as well as clearing the cache, rebooting the computer, scanning for viruses, with no result.

I'd rather avoid re-creating the account in TB as this would change the order of the accounts, and my father (94 years old) might have difficulties to adapt to the change, but is someone can tell me how to recreate the account without changing the order, I am ready to try it.

I have a log of what happens when using only the "bad" account, and one for the good account from the same provider, but I don't know how to share them here. While creating the logs, I checked that if I set the second account as default (the first account having the issue before as well as after this), it still manages to connect. But of course, maybe the second account would have also had a connection issue later...

Does someone have any explanation, or ideas about how to solve this issue?

I used to use the basic version of Thunderbird on a daily basis, but after a while it became buggy and didn't work properly. I've been using Thunderbird beta for 3 months now. I had to take a break from work because I need to add multiple Outlook emails to Thunderbird online for one thing. I've been doing the same thing for three days now, adding emails to receive notifications about shipments ready for pickup.

After adding 2 to 5 accounts, a message pops up saying that my data is incorrect, but it is 100% correct. When I try again, an exchange error pops up, and when I check through my regular browser, I can log in and check my mailbox normally, but it does not connect to Thunderbird beta or Thunderbird daily.

And so, for 3 days, I added 2 to 5 accounts correctly, and then finally, no account wants to be added. I checked that Thunderbird has no limit, I saw about 300 accounts per day, but the accounts I'm doing are a ridiculous limit and I have some problem with the application, and before I used it the same way I do now and had no problems. Thunderbird Daily works just as badly, no works from 2 to 5 accounts, then an error pops up. What's going on with this???!?!

ich kann von Anfang Dezember an nicht mehr auf mein Arcor Mail zugreifen äh der sagt der Server ist nicht erreichbar habe schon alles versucht hier mit Windows 7 ist der PC ich habe zwei PCs mit Windows 7 und beide gehen nicht nur am Windows 10 habe ich wieder hinbekommen aber Windows 7 Minuten ich bin schon am verzweifeln oder geht das nicht mehr in Windows

The connection has timed out

The server at eofficepwd.kerala.gov.in is taking too long to respond.

   * itemThe 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 that Firefox is permitted to access the web.