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I have just downloaded Thunderbird on my Samsung mobile. Incoming emails are not displaying in Inbox. I have tried turning sync off and push on and it still won't work. The only way is to manually sync

Hello,

Recently, the manual message check feature has stopped working, whether I use the “Get Messages” button or the menu.

When this feature was still working, I could see the progress of the message retrieval from the server in the status bar; now nothing happens (no display in the status bar and no messages are retrieved).

I should note that this isn’t a connection issue, since new messages are successfully retrieved during periodic checks or when Thunderbird starts up.

Has anyone else encountered this problem?

Thanks!

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

My husband (DG) is 88 and beginning to have severe memory & analysis problems. I recently tried for three days, using his computer, to set up an account for him on the Social Security site, that I could oversee. It accepted a password, but kept asking for a 'backup code' that supposedly was 'assigned' - so I would have a second method to verify the account. There was no way, on that web page, that I could request a 'backup code' or ask for the '10 backup codes' that were supposedly given automatically. I wanted to simply get a letter that explained his SSA eligibility, so we could apply for Senior housing. I was able to call SSA and request the letter - but it will take 14 days by mail. We need it now - and I should have been able to simply download a PDF eligibility letter to print out. In less than 5 minutes, I was able to request and download an eligibility letter for myself on MY SSA account - but could not do it through his SSA account. I need to be able to communicate with SSA (& other agencies) and receive their replies through an email "AccountForDG@centuryxxxxx.net" that I can read in my email account "CuriousQuestor@centuryxxxxx.net). How do I set this up? Thanks in advance.

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

Thunderbird demands my password for outgoing SMT server when I go to send an email but when I enter it, system won't accept it even though it is the correct password. I have had this problem for some time and it comes and goes. Sometimes I have ebeen able to send without a problem, then it comes back I had a helpful reply from this forum (can't find who posted it - Mick?) tellling me to go into the error console (Ctrl + Shift + J) and delete eveything in that. I tried that. It worked at first, but now when I do it, it has no effect. And the problem now appears to have become permanent, although occasionally after I have been working for some hours, then suddenly I can send without any problem. Problem hasn't budged though for a couple of days now. This is a mysterious and erratic gremlin, which now seems to have taken root. Any suggestions please? Carol

The last message in my inbox was on 9/3/2027. After an update, now all messages are now going into a different folder, which has only one rule, and that is all messages from a specific email address. Just now, all messages from my inbox just emptied into a different folder. I don't know what happened with Message Filtering in the latest update, but I have to turn off filtering.

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?

As of September 3, 2026 all my new emails are going into a random folder instead of the inbox. This is also happening on my wife's PC plus and we are not getting the emails to our iPhones until we get out of Thunderbird. What has changed? This has not happened before.

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

Thunderbird has always had a problem with filtering all incoming mail to the correct folders. Sometimes it does it correctly and sometimes it doesn't. But this morning it is dumping all my incoming mail into a folder that isn't the Incoming mail folder.

How do I get it to put the incoming mail in the Incoming folder?

Outlook.jpの個人アカウントをThunderbirdで使用しています。 IMAPは outlook.office365.com / 993 / SSL/TLS / OAuth2 で正常に受信できます。

SMTPは smtp-mail.outlook.com / 587 / STARTTLS / OAuth2 で送信すると、 535 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Mailbox. と返されます。

smtp.office365.com / 587 / STARTTLS / OAuth2 も試しましたが、こちらは接続タイムアウトになりました。 MicrosoftアカウントのOAuth2認証と2段階認証は完了しています。 Outlook Web版・新しいOutlookでは送受信正常です。 Microsoftサポートには問い合わせましたが、Thunderbird側へ確認するよう案内されました。

この状態でThunderbird側にまだ確認すべき設定がありますか？ それともMicrosoft側でSMTP AUTHが無効になっている状態でしょうか？

This started almost two months ago. When I open my email on Thunderbird, the inbox fills OK. As I go through the emails at some point, several just disappear from Thunderbird? When I access my emails directly from Spectrum, they are still there, but if I refresh they may disappear.

I paid an expert on Just Answers and he spent over an hour and came back with Spectrum was having issues, they were aware and they were fixing them. I thought the problem was solved, but then it kept on happening. I am losing important documents every day! Please help me!

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?!

All of the incoming messages are going to Trash. This includes messages I have not indicated as trash. I get no new messages to my inbox. Started today, 09/04/2026.

I am unable to send Email. I am using THUNDERBIRD app..My Email address is [redacted from public] @talktalk.net. I am receiving mail but cannot send.. I have a message that reactivation is required after being blocked. [ have paid my subscription but still blocked. Thunderbird version 155.0