Thunderbird Community Forum

Aloha. I'm helping a friend with setting up a new Windows 11 PC, and cannot get Thunderbird to connect to Spectrum's servers. I spent an hour on the phone with Spectrum support and they just gave up and said it must be an issue with Thunderbird. Here are the details:

- Brand new Dell 24 All-in-One EC24250 - Windows 11 25H2 plus all additional fixes. - All Dell drivers updated. - Thunderbird V155.0 64-bit

If I click on 'Get Messages' after a while I get: "Connection to server mail.twc.com timed out". I've gone into the config editor and changed mailnews.tcptimeout from 100 to 500 and still get the error.

In the Account Settings | Server Settings | Test server connection I get: An error occurred connecting to mail.twc.com:993.

I've tried this with both setting up a brand new account in Thunderbird, and also via copying the 'Thunderbird' folder from %appdata%\roaming from her old machine.

Email configuration (from Spectrum).

IMAP Settings Server name: mail.twc.com Port: 993 user name: abcd@hawaii.rr.com Connection Security: SSL/TLS Authentication method: Normal password

SMTP settings Server Name: mail.twc.com Port 587 Connection Security: STARTTLS Authentication method: Normal password

Can anyone help me troubleshoot this scenario?

Mahalo, Harry Z

Sending of the message failed. An error occurred while sending mail. The mail server responded: <anonymous@[10.0.0.31]>: Sender address rejected: not owned by user a1.914306843. Please check the message recipient "christine.krieger@a1.net" and try again.

why do I get this on new download

Problem with message are going to the Trash folder, not the Inbox with all local folders in place. After taken in profile the local folders off, the new downloading from message are working just fine to the Inbox . What is the problem Thanks for helping.

I've been using Thunderbird on Windows 10 since last year sometime. Currently I'm on version 151.0.1.

I've 4 x mailboxes here and since yesterday, 3 of them show me an unusual message when checking for emails. I tried attaching a screenshot but although the screenshot uploaded, I couldn't find a way to insert it here. But the message says Unable to write the email to the mailbox and asks me to check if I've write privileges (which I have) and to cheek the available disk space.(currently 101GB free).

The message is happening 2 or 3 times each day and lasts for about half an hour, then everything works fine again. Has anyone else seen this??

TB is sending most of my email to the wrong folder. I had 21 message filters, but then I noticed that a lot of things were going to a folder named "bridge" for no apparent reason. I looked at the filter log, but there was nothing in the log for the last few months.

I did have a filter sending certain messages to the "bridge" folder, but TB is sending things there for no reason. I disabled all 21 message filters, and it is still doing it.

I have version 155.0 and I'm using Windows 11 25H2.

How can this be fixed?

Thunderbird has stopped getting messages and 'get messages' doesn't work & I have to close & restart thunderbird to receive them. Nothing has changed with the email client itself.

I know messages have arrived by checking my providers phone app, but for Thunderbird to download them to my PC I now have to restart Thunderbird to get new messages

I use IMAP to grab my mail, if that's important.

In the last couple of days, my normal method of deleting messages from my Inbox, right-clicking on the message and selecting the trash can icon, has stopped working: the message disappears for a moment, then reappears. I can delete it by dragging it to the Trash folder in the folders pane on the left.

I've followed the instructions given in several postings here, including deleting the Trash and trash.msf files, doing that and then creating an empty txt file called Trash (no .txt), and using Repair Folder.

It just now occurred to me to disconnect from the Internet and try to delete a message. It worked fine?!

After fixing the view problem of my email in Thunderbird (thanks for the F8 tip!), my email stopped downloading. I have no "prompt for password" checked. There isn't a primary password checked. I've confirmed the pop outgoing email is correct with the email provider (google). I can get into it without any issues and see my emails there.

I've re-entered the password for the pop outgoing email to no avail.

Since Aug. 20 I have been having trouble sending and receiving msgs. (on two email addresses) at Thunderbird when it interfaces with Charter Spectrum. Have sent many msgs. to Thunderbird here and also in close contact with Spectrum. Will this be fixed? thank you.

All of a sudden, all of my incoming messages in Thunderbird are getting sent to "Local Folders/Trash" I have made NO CHANGES to the account nor did I set up any filters. When I try to manually move messages I want from trash to the inbox, it automatically sends them back to the trash folder.

I have a recurring problem with Thunderbird 153.2.0esr (64-bit).

After clicking the Send button, the message is successfully sent to the recipients. I can see that the sending process takes place, and I have confirmed that the message was actually delivered because I was one of the recipients myself and several BCC recipients have replied to it.

However, after sending, the message sometimes does not appear in the Sent folder. Instead, it remains in the Drafts folder.

This is particularly problematic because it gives the impression that the message may not have been sent, although it actually has been delivered. There is therefore a risk of sending the same message again by mistake.

The problem occurs only occasionally. The most recent occurrence involved an email sent to approximately 180 recipients via BCC with an attachment of about 1.8 MB.

My email provider is WEB.DE and the account is configured as an IMAP account.

In Thunderbird under Account Settings → Copies & Folders, the option to save a copy of sent messages in the Sent folder is enabled.

Expected behavior: After successful sending, the message should be removed from Drafts and a copy should be stored in the Sent folder.

Actual behavior: The message is successfully sent, but remains in Drafts and no copy appears in the Sent folder.

.I get this meassage when I try to send an email from my thunderbird account - Sending of the message failed An error occurred while sending mail. The mail server responded: This account has been disabled due to suspicious activity.. Please verify that your email address is correct in your account settings and try again.

For some reason, yesterday about early afternoon, after an email deleting session, I got the same set of emails in my Inbox, but duplicated. I hadn't done anything, I hadn't restarted, they just appeared, And now, they are going to another folder altogether and not by Inbox! Also, some of the filters no longer work. Anyone else experienced this? I am using TB 155.0 on W11.

Hi, I'm trying to move from outlook and use thunderbird. But every time I try to login using my outlook email account I get an 'authentication error'. I tried to look online for the solution, but haven't found it.

Anyone able to help

Hi. i have an IMAP account. I like to have my inbox in threaded view, so i know if i replied to my customers and to easily view the order of the emails. This causes a problem because i also like to have every sent email in the "SENT" folder, which made me use the Copy Sent to Current PWE, and it works like i want now.

But something happened after i have been using this extension (even though it happened only once): the same person answered to a chain of emails, which was already organized has thread, the sendedr is the same and the subject is exaclty the same, but the email was placed on my INBOX but OUTSIDE the thread.

Why did this happened and how can i force that message inside the thread again?

Thanks you

Since 26 August I have not received any emails! I am able to go to my browser & see all my emails so I think fault must be with Thunderbird!

Help please..

Afrihost is my service provider and emails are accessed via a webmail page. The size and functionality is limited and I use Mozilla Thunderbird on my laptop with Windows 11 to save emails in local folders on my hard drive. I can't do this via webmail and my backup changes between Thunderbird and the webmail page. Yesterday I cleared my inbox to local folders in Thunderbird but am no longer receiving emails there. My old and new emails can still be seen in the webmail inbox, I don't know if I've exceeded some limit and I don't want to lose old emails in my local folders. Personal, low volume use only