Ẹyẹ àrá Community Forum

I've just received a security alert regarded as High regarding Thunderbird. The alert says it has to do with version 128.7.0 but Thunderbird says I am using version 140.2.0esr (64 bit version).

Have you been made aware that there might be a problem? Do you have a solution for this?

Thank you

Yesterday 08/26/2025 Thunderbird comes up with an error that Comcast IMAP timed out. I can get my email on the same computer going to Comcast or using other third party email clients but all my Comcast accounts time out with Thunderbird. I have made no changes to any settings, it just stopped working.

Today (27th August 2025), I got the RFC 5321 error with every email I was sending to. On checking with Thunderbird help, I came to understand that this issue was solved 9 years ago. I have been using Thunderbird for about 2 years now. I faced this error for the first time today. Is there something new that has happened?

I have program version 142.0 (64 bits). After update, one of the main folders "templates" is located in the middle of the folders, instead of at the very top. I can't fix it to get it back to the top. The "repair folder" option also doesn't work. I am sending a screenshot in the attachment.

For mobile email use I use a yahoo.com.au website email option For my desktop email use I use Thunderbird Desktop - the problem being that while thunderbird has been set up to download all 'inbox' emails sitting on the yahoo website how do I get it to automatically download the other emails sitting in my 'sent' folder?

regards Graham Bruce gb20033@yahoo.com.au

I have a list of emails called News letter reminder. Have trouble sending it. Refuses due to no domain or something like that. Fiddle around and sometimes it goes. What am I doing wrong, what should I check? Only started doing it recently..... cant work out what i am doing wrong. Dont want to move off thunderbird. Thanks, John Dobson jrdobson1@bigpond.com

How to set Thunderbird to show full date for today's mails? I set mail.ui.display.dateformat.today to 2 as was recommended here https://support.mozilla.org/en-US/questions/1285998, and restarted the app. Didn't help.

Two days ago I deleted lots of old emails from Trash and Junk. Since then it's not working correctly. It's not downloading messages all the time. I have to log out and log in several times before I get all messages. It's not sending emails all the time. It's a mess!!!

As of 8/26/25 The GET MESSAGES does not work for Windows 10, Firefox, from Comcast, and reinstalled both versions of Thunderbird. Settings are the same for IPOP SMTP. Just started today. Can send emails. Troubleshoot and/or start in Safe Mode does not help. Clearing every known cache in Windows, Firefox does not help. POSSIBLY Comcast blew it.

Sending of the message failed, could not send because the connection to outgoing server [smtp] optusnet.com.au timed out.

お世話になります。 　一部のHTMLメールが、表示されずにソースのまま表示されてしまいます。普通のHTMLメールは上手く行くのですが、僕は個人のECサイトをwordpressで運営していて、そこからの通知メールのみどのメールも、HTMLメールがソース表示になってしまいます。ほかのタブレットやiphoneなどで見ると、これらのメールはちゃんとマークアップされて表示されます。また、このほかのサイトからのHTMLメールは異常がなく、thunderbirdでもちゃんとみることができます。 　OSはwindows11 Homeで、最新版のThunderbirdを使用しています。 　何かアドバイスを戴けたらさいわいです。

Hello,

We are using Mozilla Thunderbird on a Windows-based computer to manage our corporate email hosted on the Yandex domain. We are facing an issue: emails sent to addresses ending with @gmail.com do not reach the recipients. However, we can successfully receive emails from @gmail.com addresses.

Could you please advise how we can resolve this issue and what settings in Thunderbird should be checked to ensure correct email delivery?

Thank you!

For a couple of years on and off I have been trying to assist a dear friend of mine with his windstream.net account using the Thunderbird email client.

The problem is that while we set up everything quite easily, the account is added, all of his folders are populated and everything is perfect initially within a few hours to a few days....suddenly he begins to receive the following error message: login to server imap.windstream.net with username failed.

At first it will work for a while hitting "Retry". Then after a while it stops sending and receiving email. Eventually I am forced to remove the accounts and begin the cycle again. I can't for the life of me work it out.

So far: I have updated the program. Set up the account from scratch numerous times Updated and changed the windstream email password. Scrubbed the program and all related folders numerous times. Checked for any obvious interference from security apps (currently only windows defender running) Checked for any internet connectivity problems (there were none) Changed around the IMAP settings to use any other combination of settings that would work (there were none) Read all the Mozilla Thunderbird posts on this forum related to Windstream numerous times. Scoured the internet for any other help. So now I'm actually posting about it.

Once again, initially the settings below work just fine, there is nothing but green lights and check marks and everything seems to be fine.....until its not and the cycle repeats over and over. I would welcome any assistance from anyone with experience using windsteam email on mozilla thunderbird or a moderator or administrator if any review these forums. My friend has used the Thunderbird client for many years and does not wish to switch. I will include a few screenshots of the error message. Thank you in advance for any and all assistance!

   Incoming Server (IMAP): imap.windstream.net
   IMAP Port (SSL/TLS): 993
   IMAP Port (non-secure): 143
   Authentication: Required for both incoming and outgoing servers.
   Username: Your full Windstream email address (e.g., your-email@windstream.net).
   Password: Your Windstream email account password. 

Outgoing Server (SMTP):

   SMTP Server: smtp.windstream.net
   SMTP Port (SSL/TLS): 465
   SMTP Port (non-secure): 587

How do I view the message headers on the emails I receive? I tried right-clicking in/on/near the sender's address area but there's no option that pops ups like in other email programs. I've searched "email headers" and nothing comes back. Am I missing the instructions somewhere?

There was a forced upgrade to "Eclipse" a couple of months ago, and TB stopped showing a notification for new/unread emails on the taskbar icon. This was on Win10.

I hoped that a clean install of Win11 would maybe fix the issue, but nothing changed.

The weird thing is that TB is not listed under System>Notifications in Win11 settings (see image). I guess the issue lies within TB, not Win11.

Is this a new bug, or have i missed some setting? I'm on v142 currently.

I have a single email that appears to be empty, but I cannot delete it. When I open the message in a new tab you can see that it blank. I will attach a screen capture. I've tried everything short of reload Thunderbird to delete this particular email.

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.