Thunderbird Community Forum

When attempting to send a web address under "file" tab using Thunderbird, there is an offering "email Link". "email link" does nothing with Windows 11 but worked with Windows 10? I have to copy and paste to send a web address to a mail recipient.

                                     tj28@optonline.net

Trying to send e-mails and get the following message:-

Sending of the message failed. An error occurred while sending mail. The server responded: <X@totalise.co.uk>recipiant rejected - relay denied. Please check the message recipient"rod.coleman@totalise.co.uk" and try again.

This happens with all e-mails.

(PII redacted by moderator)

Thunderbird is not connecting with Xfinity Comcast for sending or receiving emails at gpenkala@comcast.net . This combination was working fine for decades. Last Friday (Jun 12) was the last email I received in Thunderbird. I can view current emails on the Xfinity website, but these are not being transferred to my Thunderbird account anymore, These are the error messages:

"Sending of the message failed.

Unable to authenticate to Outgoing server (SMTP) smtp.comcast.net. Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'." "Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: resomta-c2p-555483.sys.comcast.net resomta-c2p-555483.sys.comcast.net Excessive failed authentication, ESMTP server temporarily not available."

Can you tell me what configurations I should be using within Thunderbird for Incoming and Outgoing Servers?

I'm using Thunderbird 152.0a1 (2026-04-22) on Windows 10 64 bit. When I click the "Get Messages" button or File > Get New Messages for > [my e-mail account] nothing happens. The only way I've found to check for messages manually is by closing and re-opening the program.

My recollection is that prior to a recent automatic update to Thunderbird 140.12.1esr (64-bit) when I had a message composition window open, there were "SEND" button and possibly a "SEND LATER" button (to the left of the addressee and cc addresses in addition to the keyboard shortcuts (CTRL ENTER and CTRL SHIFT ENTER).

Following the update, there is no longer anything to the left of the addressee information. I have checked the toolbar menus, and there do not appear to be any button options. I can still send messages, but the lack of the buttons is a hindrance.

TB suddenly moves messages from inbox to trash automatically without any interaction. Search through the forrum shows that it has been asked for already, see https://support.mozilla.org/en-US/questions/1588804, similar postings can also be found with you search engine.

As described in other postings, the messages are moved from Inbox to trash. When moving them back manually from trash to inbox, they are moved to trash again immediately.

• it happens for the default account only,
• there're no filters at all in TB,
• junk detection is disabled,
• Settings->General Storage is all disabled,
• (account)->Settings->Server Settings has checked "move deleted messages to trash",
• (account)->Settings->Storage is all disabled,
• Inbox->Properties "Repair folder" does not help,
• Inbox->Properties "rules is set to "use account settings" (and greyd out "do not delete messages"),
• exactly same behaviour when starting TB in save mode,
• manually deleting all *.msf files (for inbox) does not help,
• manually deleting xulstore.json does not help,

Additional notes, which are not related to the problem, IMHO:

• IMAP on port 993,
• no other clients anywhere are connected to that account,
• TB configured for more than 10 accounts, more than 500 folders and sub-folders,
• host with > 16GB RAM, TB uses 3GB virt,
• problem observerd in older TB also, at least 13x.x

I'd be happy to debug/trace the problem if someone can give me detailled insructions how to start TB with debugging. Please feel free to ask for about:config settings as they are non-ambiguous and language independent ;-)

Thanks.

After updating to 153.0.1esr(aarch64). the SEND button has disappeared. There's no way to send an email. (I can receive emails.) I am a Mac mini M2 Pro. OS 26.4.1

I cannot find a link to download a previous release of Thuderbird, which was working fine until this update.

I received a spam message this morning that had a "Disposition-Notification-To" (aka Read Receipt) line that had MY email address on it. I honestly don't know why a spammer would do this - but that's not the issue. I have Read Receipts disabled, but Thunderbird generated an email (to me) and sent it to my mail host. This seems like a bug. Even if the Read Receipt has my email address on it (making it mostly harmless), Thunderbird shouldn't have generated the message. Or am I missing something? Thanks.

When we first started using a third party application to track our customers information & jobs; we received emails showing the customers name on the correspondent/from column. Now all of the emails show the third party applications name and I do not know which customers are trying to contact us.

Hello I am having difficulty in sending message for 2 of my email addresses through Hostinger. My ither accounts through Hostinger works fine. See pic attached for the error message. Please help and advice. Thank you

I am trying Thunderbird with the intention of replacing MS Outlook. So, I'm using it alongside Outlook. This is happening with my Yahoo.com account. FYI - Xfinity migrated my comcast.com account to mail.yahoo.com, which has caused a lot of problems, as well.

I want to use thunderbird on a Windows 11 laptop. Tell me how to connect Thunderbird to send and receive emails from email account, jds@sefcik.net, hosted at smartmail.buz.net.

Hi, my folders have disappeared, apart from my inbox - including sent, junk, deleted. How do I recover them please? I've tried the suggestions from Google, but nothing works.

Also, as a separate issue, I can't now send or receive emails from my iPhone, but can from my Mac? On my phone, I get a message saying that the server is not responding. I have tried entering my server details but it doesn't work. The message says 'bad certificate format - 9,808'. This happened overnight and I hadn't changed anything. How do I fix this please, in order to send and receive messages on my phone.

I sent an email to my mechanic today and another site attached a CC to their Website. It is weird I didn't send an email to them support@bloominto.co, yet I received a reply and there was a CC to my mechanic in it.

How is it possible?

Добрый день. пришло вот такое письмо от Яндекса.

что можно сделать чтобы продолжить работать в программе Thunderbird ?*?? помогите пожалуйста

Для организаций работа с Яндекс Почтой по протоколам IMAP, SMTP и POP3 будет доступна только с тарифом Яндекс 360 с 13 июля У вашей организации нет подключённого тарифа. Поэтому с почтой не получится работать в Microsoft Outlook, Mozilla Thunderbird и других программах. Вы по‑прежнему сможете использовать веб-версию и приложение. Личная почта продолжит работать без изменений. Новые условия будут действовать только для аккаунтов в организациях. Обратитесь к администратору, чтобы подключить тариф Яндекс 360 и сохранить доступ к почте по протоколам. Чтобы продолжить обеспечивать стабильную и качественную работу сервиса, поддержка сторонних почтовых клиентов теперь входит в тарифы Яндекс 360. Подробнее в Справке. Условия использования Сервисы Яндекс 360