Thunderbird Community Forum

Перестали отправляться письма с почтового ящика gmail.com. Соединение с сервером исходящей почты не устанавливается. Разные порты и способы шифрования уже пробовал. помогите решить проблему. Спасибо.

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 am trying to migrate from Microsoft Outlook 2021 to Mozilla Thunderbird. I have successfully imported the email from a number of different email accounts. I would now like to import the archived emails held in a number of PST files. The import tool would seem to be what is required, but it does not seem to allow me to select the PST files that I wish to import. I am concerned that it will try to import all email messages from my Outlook 2021. Is there a way of restricting it to just individual PST files?

Hello! I'm having a problem where a specific tag keeps un-applying itself. I have a number of filters that look for specific words in emails, and tag them accordingly -- all of my other filters are working just fine, but one specific one has decided to stop working. It has exactly the same settings as the other ones, and when I manually run the filter, it correctly applies the right tag.

But, minutes later, the tag will un-apply itself, and I cannot figure out why. For some reason, an older message is staying correctly tagged with that filter, but newer ones un-apply the tag. This same filter and tag used to work just fine. Other tags on emails from the same source work fine, too.

I send an email and I get this response as a failed send. Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: resomta-a2p-646964.sys.comcast.net ESMTP server not available (396356/173.46.82.217).

Hello Good day,

With thunderbird I have tidied up my e-mails at server at googlemail.com yesterday ?!

I have deleted 50 percent of "all-inbox" and of "sent messages".

This means that - before this - 12,9 GB of memory at googlemail.com were used. Now it should be at about 6 GB of memory used actually ?!

In thunderbird-window below it is said that 12.9 GB of memory are still used ?!

Normally it should be at 6 GB of memory are now used ?

Thunderbird says still "storage is 85 percent full" ?!

Have I to wait some days until memory usage is actualized ?

Thank you for answer. Greetz. dschinn1001

I have several MBOX files with me and I want to import MBOX files into the Thunderbird email client. I've come across different methods, including manual techniques and third-party tools, but I'm unsure which approach is the most efficient, especially when dealing with multiple or large-sized MBOX files. Some methods also seem complicated for users who are not very technical.

Suggest me any reliable tool for this!

Is there a way to revert back from a Thunderbird update? I have my inbox with current emails, but my folder organization on the left is disorganized and contents are missing and many folders are missing. It's destroyed YEARS of work!

As of Oct 12 2026 I also have this issue. About a week before the 12th I was getting messages that I needed to sign into my RCN account which I would do and it just kept asking me. A few times each night to start then right before it shut me out I had over 50 of these messages just flooding my screen. I never did get a screen shot of that message, but did for the 2 error messages I got later once it shut me out.

I shut down my computer the night of the 11th then when I signed back in on the 12th I could not send or recieve any emails. SOmething similar had happened before, but when I shut down again it went away. This time it did not. I then tried to access my emails thru the webmail I can access, but that also had shut me out. I also tried my tablet, a borrowed smart phone, but I could not access anything for my emails. I troubleshooted with my email company and my internet company, but they found nothing.

Then I shut off the wi-fi on the smart phone and bin go I could access the webmail. But I still cannot find anything on what to do to fix this.

I use RCN for my email, Spectrum for my internet. It is a POP3. Running Thunderbird version 153.5 Oesr (32 bit) Meadow, which says it is up to date. I have norton 360 anti virus & do not use VPN. I disabled my Auto-protect and firewall on the Norton and that did not change anything.

I have sent the error messages to RCN and also troubleshot with Microsoft and had some hints, but nothing has come of that yet. Here are the screen shots of the only 2 things I ould capture. The error message was when I was trying to access my email thru Thunderbird. And it came up every time I tried to send messages, not that does not show up anymore and nothing happens when I try and send anything. The second one was when I was trying to access the RCN webmail and it would not let me in on anything I used. Until I shout off the WI-Fi. Then the smart phone could access my webmail account.

After today's update, my email is not loading from Gmail. Last delivery was 5 a.m. It is now after 5 p.m.I have restarted Thunderbird 3 times, restarted my computer and restarted the modem to no avail.

When I try to send out an email, I receive an error message that states, Sending of message failed. An error occurred while sending mail. The mail server responded: <cjmst61@charternet> sender rejected. Please verify that your email address is correct in your account settings and try again. I have checked my settings and still can't send

in Thunderbird email until last night I had folders I had set up for my old emails subdivided into subfolders for finance medical etc. I also had a folder for sent mails This morning they have disappeared and been replaced by folders INBOX drafts INBOX sent INBOX spam and INBOX Trash; all are empty. How do I recover the old folders and their contents?

Hello,

I’m having trouble adding my Gmail account to Mozilla Thunderbird. The Google authentication process completes successfully, but the problem persists in Thunderbird, and I’m unable to configure the account correctly.

I have double-checked the account names and credentials, and I can confirm that they are correct. The authentication process has been completed successfully multiple times, and the passwords have also been verified. Therefore, the issue is not caused by incorrect account names, passwords, or authentication details.

I have attached screenshots showing the problem for reference.

Could you please help me identify the root cause of this issue and explain how to resolve it?

Thank you for your help.

Best regards,