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I have 8 email accounts on Thunderbird, 5 Gmail and 3 Outlook. My newly added Gmail account has stopped downloading email, while all the others still work as they should. I keep getting pop-up messages from Thunderbird “Server imap.gmail.com has disconnected”. The problem started yesterday and only 1 of the 8 accounts. This new Gmail account is transferred from one of my Hotmail accounts. I have 7800 emails on the server waiting to come down. Alfred

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

How can I move emails within Thunderbird? I want to move emails from the Sent folder of my old email account to the Sent Folder of my current email account. Emails don't move when I right-click on them and select "Move to" and then select the destination folder. All that happens is that the Thunderbird status bar reports: "Looking up pop...." "Connecting to pop..." "Connected to pop..." "Checking mail server capabilities."

I have been using Thunderbird for ages now with no problem, but I suddenly realised that no recent emails were appearing from my Gmail account. I have tried everything suggested on line to resolve the problem, including uninstalling and reinstalling Thunderbird, and deleting and re-entering my acccount details but neither the IMAP or SMTP servers will connect to Gmail. I have reset all of the server settings on Thunderbird, and have checked that Gmail is IMAP compliant (which, apparently, is is now automatically). I have spent hours trying to sort this out and am just at the point of abandoning Thunderbird completely, but I am loathe to do so if there is a solution. The latest error message i have received is "Unable to log in at server. Probably wrong configuration, username or password" but I don't know what else I can check or change.

my isp no longer supports Thunderbird. When I try to log onto my thunderbird account it won't let me connect to the server. I can check my email by logging on to their website and using their email program, but I would like to keep Thunderbird. I have been using it for year. Is there a way I can get their server to recognize thunderbird when I try and log on to it. The ISP is Breezeline....thanks

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?

I am trying to add my gmail account to Thunderbird, with the normal procedure. It immediately gives the correct settings with OAuth, send me to Google to get the permission when confirming these, then displays «Unable to connect to the server. The configuration, username or password are probably incorrect.», although I have double checked all of these. The same thing happens to a friend I am trying to help (with the latest Thunderbird version available) (140.2.0esr on Ubuntu 24.4.3 in my case). I wonder what happens, as I used to install Thunderbird and add accounts easily, from Google or other services, on a number of people's computer, a few months ago.

So I started using Firefox on my older and newer laptops, but I've noticed that on my older laptop it has started giving me the message "You must log in to this network before you can access the internet", although I am already signed in on my Mozilla account there too. My newer laptop has had no issues for the record. Both systems are running windows 11, both have the same account that I am using, etc. If it makes any difference, my older laptop is using an ethernet cable whilst the newer one is connected via Wi-Fi. When I ran into this issue yesterday on my old laptop, the issue somehow resolved itself after I created a bugzilla account, although I am unsure if this was coicidence, so now I am confused why the issue has showed up again. Awaiting any kind of help or advice, thank you.

Moderator note: See also /questions/1551659 for a screenshot.

Starting last night, Thunderbird 140.2.0esr has trouble connecting to Comcast email servers. In my case, I am getting an error that the connection was reset. Sometimes, if I close TB and re-open, it will connect for a bit and download new mail, but later fail. This is using the POP3 servers. On the Comcast forums, others are reporting similar issues. https://forums.xfinity.com/conversations/email/unable-to-connect-to-pop3-server-this-morning/68af0959e127b572a1266228

I don't have TB on my Android phone, but Outlook is also having issues with forcing me to sign in, and that can take 2-3 tries, and will . The Yahoo Mail and FairEmail apps do work on the phone without problems. These all use the IMAP servers.

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.

[redacted] problem you [redacted] im having issues with the video and ads as all of my apps are disabeld nothing works and firefox it self causing probs and no one is helping out.

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

Hoping that someone can get me pointed in the right direction to sort out a problem I'm having.

I've been using Thunderbird successfully for a number of years on a few different PCs to access my email account. It worked just fine years ago with AT&T and more recently Frontier email servers. Several months ago Frontier discontinued their email service. But I had a "Free Email For Life" account which they automatically switched over to a Yahoo Email account which allowed me to continue using my long standing "@Frontier.com" address. The change over went pretty smoothly and Thunderbird was still working as expected. Until it didn't.

In the last month or two Thunderbird in two Windows machines will not connect to my Yahoo email account. I continually get messages indicating a "time out" issue when attempting to connect. But I can still access my email by logging directly into my Yahoo webmail account.

The two main Thunderbird installations, one on a Win 10 laptop and another on a Win 7 Pro desktop are the main problem areas with time-outs and no connection established. Oddly enough Thunderbird for Android seems to work just fine on my phone.

The only free tech help that Yahoo would provide was essentially to check my SMTP server settings, which I did again for probably the fourth or fifth time. I also changed my password which was a couple years old . . . just in case. But I'm still spinning my wheels.

Hopefully someone else has had a similar experience and can tell me what I may have overlooked. I don't want to switch to Gmail or any other server if I can avoid it. Yahoo offers their own 3rd party app but it seems a bit futzier and more invasive than Thunderbird. Somebody please point me in the right direction of where to dig in next.

Trying on here, as I suspect the android forum gets little attention.

I can send email with TB for Android over the Internet from home, but not over the Internet in 4 out of 4 cafes. it's not due to a VPN. It only happens eith Thunderbird, not Gmail or Outlook.

Hello,

I have been experiencing repeated errors with my POP3 gmail accounts in Thunderbird. My main account retrieves messages quickly (within a couple of seconds) but my other accounts take several minutes (20-30 min) even although there are only a couple of light messages to sync. I do not want to switch to IMAP because I want to delete my messages from the server once they've been synced to my computer.

Here is an excerpt from the console error messages: 12:42:06,307 pop3.server3.3: NetworkTimeoutError: a Network error occurred Pop3Client.sys.mjs:365:18 12:42:06,308 pop3.server3.3: SecurityError info: Pop3Client.sys.mjs:407:20

12:47:08,468 pop3.server4.6: NetworkTimeoutError: a Network error occurred Pop3Client.sys.mjs:365:18 12:47:08,471 pop3.server4.6: SecurityError info: Pop3Client.sys.mjs:407:20

12:52:08,522 pop3.server6.7: NetworkTimeoutError: a Network error occurred Pop3Client.sys.mjs:365:18 12:52:08,529 pop3.server6.7: SecurityError info: Pop3Client.sys.mjs:407:20

12:57:58,751 pop3.server4.69: NetworkTimeoutError: a Network error occurred Pop3Client.sys.mjs:365:18 12:57:58,755 pop3.server4.69: SecurityError info: Pop3Client.sys.mjs:407:20

I have verified that my POP3 settings match those recommended by gmail (server, port, SSL/TLS, authentication), but the errors persist.

Could you please advise me on: Possible causes for these types of errors in Thunderbird. Steps to diagnose and fix this issue (especially regarding certificates and connection timeouts). Whether any specific configuration is needed for Gmail POP3 with OAuth2.

Thank you in advance for your help. David

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

I use thunderbird in UK with several emails accounts. Works splendidly on desktop and mobile. Now in Greece I can neither send or receive emails on any account. But Gmail and outlook work fine. Is there a firewall problem or similar? Thanks

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".