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My Spectrum password was changed and now I cannot get direct access to TB. For some reason TB is not linking up with Spectrum password. I get a popup panel saying "Login to server Mail.TWC.Com with username jomar159@hvc.rr.com failed" Retry Enter New password Cancel I have 2 accounts on TB 1 is wmarks1 and the other is jomar159@hvc.rr.com HELP

Failure to download email from Optus. I have spent a number oif hours to no avail talking and typing with the Optus staff regarding this problem. 1. I can send email from TB but cannot receive. 2. I can see the incoming emails in their Webmail site. 3. Optus confirm my settings are correct for both the mail server and SMTP server. When I go to Settings> Security > Passwords > remove server so I can re-submit my password, the only one showing is the SMTP server. Should the incoming mail server also be shown?

I am frustrated and ready to dump TB but have bee with it many years and don't want to start again with another programme as I am 83 and am partially blind. Please can anyone assist?

Why does it take 30 minutes or more before Thunderbird downloads the new messages for the day. Most of the time Thunderbird will not download new message for 30 minutes or more. And some times it will let me know i have new messages and not download them Pleas help. I must have missed some indicator

Thank You Richard Merrell <redacted>

Starting this week, an increasing percentage of, BUT NOT ALL, incoming e-mails are coming through unformatted, which makes them almost unreadable. In the Cards pane nothing appears except the time stamp. Some examples: id CD/0A-06843-A1BCB986; Tue, 12 Aug 2025 23:15:38 id 09/00-49518-8A0AC986; Wed, 13 Aug 2025 10:26:48 id 24/87-15587-133DD986; Thu, 14 Aug 2025 08:14:41 id 05/94-10997-4184E986; Thu, 14 Aug 2025 16:33:24 I'm running ver. 140.1.1esr (64-bit).

The same messages appear fine in Thunderbird for Android on my phone. Anybody have any clue as to what's going on?

Jeg har skiftet adgangskoden til min mailkonto hos min udbyder. Jeg har angivet koden og opnået adgang til indgående post. Hvis jeg vil sende en mail nægtes afsendelse. Jeg bliver bedt om at angive den særlige kode for udgående post til asmpt server. Den anden kode virker ikke. Jeg skal have koden som giver adgang til at afsende post.

I use TBird/GMail on two Windows 11 machines - a desktop and a laptop. In my All Mail folder there many emails promoting misc items, in fact over 1000 that I do not want. I have set server settings to delete immediately but no matter how I try the deleted emails reappear. They are not in the Bin or Trash. I get the same results using either the laptop or the desktop. Any ideas?

My email from a third party domain is routed to both my gmail inbox and to my thunderbird client. The emails typically get received by thunderbird first, and I read them quickly because of the notification that comes up. However, these emails on thunderbird disappear as soon as they show up in my gmail inbox. Does anyone know how to prevent this? I haven't found any other similar issues on the support forums or other sources.

I have tried global settings and the settings in Thunderbird but whenever i reply to a message the text is very small. I can enlarge it but have to do it for each message... Help! Please...

Hello, I speak french therefore sorry for my english ! I have since 3 days, the impossibility to send a mail. I always receive an error message like this :

L’envoi du message a échoué. Une erreur est survenue lors de l’envoi de l’e-mail : erreur du serveur SMTP. Le serveur a répondu : bluewin.ch mailout-004.p.bluenet.ch Swisscom AG sc774: Blocklisting in effect.

This have been caused as I wanted to send a message to a list of more of 100 personn and the system of my provider (Swisscom Bluewin) blocked me.

I contacted them explained the situation and the have deleted the blocking list and if I go on the email of the provider Swisscom I am free to send message without problem.

BUT in Mozilla Thunderbird i am still blocked with the above mentioned error message !

I have controlled all my SMTP info and they are correct, I have try to disabled the Bitdefender security but no way it remains blocked.

My question is, is this blocking list only remaining in Mozilla Thunderbird and for how long time or someone can help me to cancel this blocking list in Mozilla Thunderbird ?

Many thanks in advance for your help

Clapas

Running Thunderbird with three accounts on my desktop PC - two 'btinternet.com' accounts and one 'gmail.com' account. Inboxes have no more than 20 emails in them, as I delete unwanted ones and transfer others to various sub-folders ( In excess of 40 No.). Today I suddenly found that incoming emails on both bt accounts were not showing the subject or sender and the content is displayed in plain text (txt) format - no problem with the gmail account.

I have compacted and repaired the inbox folders but no difference. If I send a message from either of the bt accounts to the other the problem occurs, but if I send a message from either of the bt accounts to my gmail account, it goes through fine. I can receive bt emails fine on my laptop. I assume this is a thunderbird problem on my PC but not sure where to start - would be really grateful for any guidance.

One of my email addresses, which I haven´t used for a month or so, has stopped sending messages. I am told to check my SMTP settings. Incoming messages are being received. The server is smtp.office365.com I am using port 587, as recommended by the Outlook site. I was using 465. I have restarted the pc since making the change. The email address is ....@outlook.com Settings are: SSL/TLS OAuth2

I am using WIndows11

I cant find any useful advice on the Outlook site.

Any suggestions ?

Yesterday and today when starting Thunderbird, message at bottom of page: connected to server(inbound.att.net) Never changes to "checking for new messages" or "downloading messages" so I am unable to get mail. Close and restart does not help. Seems to be be stuck.

On a different computer with the same accounts, functions normally.

October 24,2025 Today I can't get my new emails. The pop-up says login failed. I have changed nothing in years, except for automatic Thunderbird updates - currently on 140.4.0esr (64-bit)

I have had Thunderbird for decades and have donated a small amount twice to its maintenance. Now as a result of a password change and perhaps some setting change I was not aware of and then a uninstall and reinstall of Thunderbird 4 times, I have lost my archived e-mails (did not realize a profile had to separately be set up for archived folders) and lost about 1/2 of my old e-mails as well as all my sent e-mails. Now I CANNOT SEND OUT EMAILS through my desktop but can do so through my phone - thus nothing wrong with the provider Spectrum. So something has happened on my desktop to prevent sending out e-mails even though I can receive incoming e-mails. Thus nothing wrong with the password. Also, I temporarly shut down anitvirus and firewall but that did not remedy the situation. I spoke to spectrum technical support and nothing from their end. Also, I have the current ports and settings. I love the way Thunderbird looks and its utilities compared to Gmail and Outlook so hate to walk away from it at this point. I posted before and want to see if anyone else has a simple solution. Would appreciate any considered help. please.

I have just upgraded my computer from Windows 10 to Windows 11. Due to hardware complications (e.g., new motherboard) I had this done at a shop. I took the computer in about noon on Wednesday, July 30. The upgrade to W-11 finally happened on Monday afternoon, August 11. During that period I received 83 emails to my Gmail account, which of course were not downloaded to Thunderbird, and also sent 13 -- all directly to/from the web Gmail site. Since the activation of W-11 I have received 19 emails and sent 6 -- still all directly from the web Gmail site. Due to additional hardware issues, my computer did not come home until this (Thursday, August 14) afternoon. After I got it hooked up, and running, I brought up Thunderbird. It has downloaded the 83 received + 13 sent, from 7/30 through 8/11, but not done anything with the 19 received + 6 sent emails since then. When I turned Thunderbird off and back on -- or the entire computer off and back on, it has repeated this behavior. Currently I have 332 (83*4) received messages sitting in my inbox, and 52 (13*4) sent messages sitting in my sent box.

What do I need to do, to stop it from repeating this 7/30-8/11 download; and more importantly /start/ downloading messages since then? I feel fairly confident that the timing of the switchover from W-10 to W-11 is not coincidental; and that there is something I need to do in Thunderbird under W-11, to correct this behavior.

All advice will be greatly appreciated.

Thank you, Franklin Coleman

I have Thunderbird 140.1.1esr (64-bit).

See the attached image. Just today emails started to show up oddly: 1) in the list view there is no subject or correspondent and 2) the message body begins with some message headers in text format and is followed by the HTML message source in text format (i.e. the message's HTML code).

I use an Earthlink POP3 server. These odd messages look fine when I access them via Earthlink's webmail interface. Even so, I suspect this is an Earthlink server issue, but maybe someone using a different email server has seen the same odd behavior?