Thunderbird Community Forum

Cannot send or receive email all of sudden in Thunderbird. When I the click the messages icon, nothing happens, and I get "Could not connect to server mail.twc.com; the connection was refused". When trying to send a m,message I get "Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) mail.twc.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again." No settings were changed and everything was fine when I put the computer to sleep. This happens on both a Win 7 and 11 machine Email is a Time Warner (now Spectrum) Road Runner account (twc.com). Spent an hour with Spectrum, and they say this is a third party (Thunderbird) issue. A friend has the same setup, and is having the same problems that started at the same time. Win 11 version 150.02 Win 7 115.18.0 (latest available for win 7)

Appreciate any help....

I have two Charter/Spectrum email accounts (domain is charter.net) set up via IMAP in Thunderbird (latest version) on Windows 11 Pro (also latest version, August 2026 CU is installed). They no longer update; at the moment I see no email in either after 8/27/26 around 5:00pm EDT. Confirmed via Web access there are emails after this point (a couple dozen at least, in each account).

Most recently I've tried repairing the Inbox mailbox for both. No help. Because I did that, Thunderbird now shows no emails in my Inbox even though it'd had hundreds of them before.

Note, I'd noticed the same problem a week ago, had tried fixing it at that time by removing both accounts and adding them back. They worked for a few days but then stopped working again on 8/27 as noted above.

Another oddity: If I go onto synchronization settings (right-click on account name then Subscribe), it shows no folders available to subscribe to. The folder list is empty and the Refresh button is grayed out. It shows it looked up and connected to mobile.charter.net at the bottom of the dialog, so I'd expect it would have retrieved the list of IMAP folders, but apparently it got nothing. And it refuses to get anything.

I assume I can remove the accounts and add them back, but why should this be necessary every few days? Seems bizarre. Thunderbird used to work with these accounts very well but now it seems to have blown up. Who decided this is how IMAP works?

Cannot send emails from Thunderbird to a Yahoo server. Receiving emails from this server is working. There are several options for configuring the connection to this SMTP server. Server name, port number, user name, authentication method (ie OAuth2), connection security (using SSL/TLS). There is also a password required. When I try to send a message to this server, I get a login failure with options to reset my password. Since I had a working configuration, I retrieved the password from that and tried to reset it. That did not fix this problem. I am not sure if this is a sign in issue or a missmatch of the configuration parameters. I have tried several combinations of those with no success. This server is on a Yahoo machine that reserves ports for AT&T service. If I use the Yahoo interface for email, that will work, possibly because it is going into different ports on the Yahoo machine or my sign on with them is easier to establish. I prefer the Mozilla email handler to the Yahoo/AT&T handler, so I hope I can get it working again.

After latest update Thunderbird cant send or receive emails. My settings are correct mail.charter.net port 993 outgoing mail.charter.net port 587.

Tells me I have a server error and is constantly asking for my password. HELP!!! I have been with Thunderbird since the beginning and have sent money to the cause, and now I need your help.

Thanks, Pam

In Thunderbird, how can I stop text in the previous emails in a string turning blue?

I have looked everywhere in Settings where colour is mentioned and everything is set to black text on a white background. Nothing is set to blue.

I do not want to see blue text anywhere.

Please advise.

Thunderbird has not been incoming or outgoing aol mail for me. I removed my account and set it up again and it worked for about a week, now it's not working again. I logged out, changed my password in AOL, updated it in thunderbird and my emails for the past several days appeared, but I still can't send emails. I get the following message: "Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smpt.aol.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again."

My outgoing settings: Description: AOL Mail - Server Name:smpt.aol.com - Port:587 - Connection security:SSL/TLS - Authentication method:OAuth2 - User Name:myusername@aol.com.

I have tried changing the port to 465 but it didn't help. Please help and explain it to me like I am 5 years old.

I have successfully setup and installed Tbird on my new Windows 11 computer. Now all I need is to recover my contacts from the old computer's Acronis 2020 backup. How to do that and/or what specifgic file to search for and recover. I have attached a jpg of the Acronis screen.

I'm running Thunderbird 154.0 setup with my primary gmail account. If I add a second gmail account and receive email from there, when I reply to that will my response appear to be from my primary or the new, second gmail account?

Hi I can not access and install addons.

https://addons.thunderbird.net/de/thunderbird/

Cloudflare seem to work?!

Tested with my phone as well (cellular connection)

Is this a general issue and did they notice it already?

Best regards :)

I have two email accounts, one is showing 5% of 100GB and the other is showing 94% of 3.9GB. Why the large difference? I cannot find anything about there being a Quota nor was I aware there was one when I signed up or if this is correct how to get a larger quota. Any advice appreciated please. Mike

Hello - I've been using Thunderbird email for several years now. No issues until recently, and I'm trying to determine if it is a server issue (Charter/Spectrum) or my Thunderbird email program (my husband is having the same issues on his computer). We've made no changes with settings; we did take advantage of a recent Thunderbird update that we downloaded about a month ago. Anyhow, we are having problems downloading/opening email, in addition to sending. Error messages include "Login to server mobile.charter.net with username cinmazz@charter.net failed", and "Server mobile.charter.net has disconnected. The server may have gone down or there may be a network problem." I contacted Spectrum about a week ago - they initially said it was a problem with their email app, and they were working on it. It began working properly for a day, then stopped. I contacted them again, and they then indicated no problem at their end, but they would look at the issue again and resolve by 9/7. It appears it might be a server issue but want to make sure it is not with my email program. Any suggestions for this not very tech savvy person will be helpful - thank you!

thunderbird has stopped downloading email from charter. it will work if i have a vpn open. i think the problem is with charter. i can get email if i go right to their website, but not with thunderbird or outlook. i just chatted with charter last night and they denied a problem. it has been messed up for a couple of weeks . i have been contacted by several friends that they are having the same problem. not sure why it isn't working. i have checked all the server settings. the weird part is if i open my vpn i can get my email, if that is a clue to what is going wrong. i posted a picture of their website that says they ARE having issues with legacy emails accessing email from charter/ spectrum.

A couple nights ago I updated from 140.13.0esr to 140.14.1esr, then for haha's, I checked for updates again and it took the big 153.1.1esr 'Meadow' update, now it won't play the selected email notification sound that it has been playing for the last 20+ years. It will play the 'Default system sound for new email' or any other sound file in my Media folder, old ones or brand new ones I put in there, but it will not play the one that it has been playing for the past 20+ years. I delete it and add a new copy of it and it will not play that one .wav file, plays everything else, but not that one.

When I opened Thunderbird two days ago it came up with the following message: To use your current email address, fill in your credentials. Thunderbird will automattically search for working and recommended server configurations. It asked for Full Name; Email: and Password. Fearing it was a scam I filled in my server settings manually. My server is Centurylink but my email address is embarqmail.com so when I filled in my info the send was smpt.centurylink.net port 587 (which was fine) The problem was with receive: I guess my old setup was pop.embarqmail.com port 110 and I put in pop.centurylink.net port 995 which is what Centurylink's website called for. Well this one worked and it downloaded 800 messages but no saved folders and the Thunderbird screen layout looks different from the one I am used to. A few minutes later the pop.embarqmail setup downloaded the same messages but still no saved messages. It looks like I have 2 profiles. Did the last one I entered override the old and wipe out files I had stored. Is there a fix for this mess I have created and can I retreive my old folders and messages? I tried doing a system restore and it didn't work due to corrupted files. Oh, I'm still using windows 7. Thanks

Hi, this seems to be a strange issue. I have a hotmail.com and outlook.com account as well as gmail. The hotmail one was in general use/default. It recently stopped authenticating over my main PC Thunderbird installation. The PC is a new build and was listed as a "known device" in the MS account settings. I tried removing it and it seems to not matter. But it all worked fine for awhile up until Meadows. It has authenticated a handful of times since then, particularly if I'm logged into the MSN account via the web, but not always.

I've tried changing to POP instead of IMAP and that removes the authentication error pop up message but it still won't update the folders/doesn't work. There's just no error message, so I changed the server settings back to IMAP.

It's all the same settings as worked previously including on this very computer. The same settings work with the outlook.com email, including on Thunderbird on this PC. But that wasn't in daily use or as default. The one that's no longer authenticating however was.

I've tried switching to a new profile and it doesn't work. Tried reinstalling Thunderbird and deleting old profiles to fully recreate, doesn't help.

Outgoing on this same failed account does work, only incoming will not Authenticate or update.

I have a laptop with a Win 11 and Thunderbird setup similar to as on the PC, works fine on the laptop with the same settings. In creating the accounts the "test server settings" feature returns no errors as well.

I can't tell where the actual source of failure is beyond that as the error message isn't very detailed or informative and based on the overall behaviour where it works flawlessly on the laptop, worked with those very settings previously on the now failing install, still works very rarely as well, up to and including on this same PC via Outlook program or over the web, with all the same settings. So it seems specific to Thunderbird, post Meadows update, on this PC, with only that email.

To further clarify, I have a second outlook.com based email, which still works with Thunderbird on this PC where the hotmail based account fails authentication. I also have tested the failing email via the Outlook program on this PC, including over the web by logging in with Firefox, that all works, just like it works with the laptop.

What I haven't tried to do when reinstalling Thunderbird is scrape every hint of prior installs out of it, but I did delete all of the profiles folders and content. I also just tried creating a new profile and making it the default. None of that helped.

Thanks

I'd be v grateful for help as this problem's in an email needed for me to sue for libel.

I drafted an email containing >50 screenshots, but not as attachments. Current download speed 257Mb/s.

Looking at it just now, it's saved with many instances saying "may be an image of text that says" followed by a description. Or as attached.

I thought that if I sent it to myself it may display correctly, but it doesn't. There's no notification bar.

I have the following settings: • View > Display Attachments Inline: checked. • Privacy settings > Allow remote content in messages: checked (no exceptions).

Thunderbird 153.1.1esr (aarch64) iMac macos Ventura 13.7.8

Hello,

When I start a new message, it's always shown 'Copy message to'. This has suddenly disappeared. (It puts copies into 'Sent'). I have 3 accounts set up; this seems to happen with all of them. I've probably clicked om something unusual, without noticing it. How can I get 'Copy message to' back again, please? Any suggestions? (I've tried clicking on things in Account Settings, without success.)

I see I've had a message from Mozilla saying 'Use 618307 to sign in'. I've been able to sign in and create thus message anyway. Is that normal, please?

Thanks for your help -- it's needed and appreciated.

All good wishes,

Roger Fern.

Roger Fern, Newcastle upon Tyne (England).

Hello, In our WordPress website, we have a page dedicated to our contact form. I have it connected to the email I have in Thunderbird so I can receive the forms; however, I keep getting the error of:

Mailer: Other SMTP SMTP Error: data not accepted. SMTP server error: DATA END command failed. Detail: Your message has been rejected because you have been detected sending high likelihood spam.

I saw online that I have to contact Thunderbird to resolve this issue since they are the SMTP provider. Please let me know what I should do.

(Note: I am not a coder so if I need to do any coding, please specify where I have to go and what to click)

Thank you