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Can no longer send new emails or forward existing emails

I'm not sure exactly when this problem started but it could have been when I had to move my primary email from Xfinity over to Yahoo. Also not sure if this started after… (read more)

I'm not sure exactly when this problem started but it could have been when I had to move my primary email from Xfinity over to Yahoo. Also not sure if this started after a recent Thunderbird update. I can not send new emails nor can I forward old emails. Haven't tried reply but suspect it is the same. This is the message I get: Sending of the message failed. An error occurred while sending mail. The mail server responded: Request failed; Mailbox unavailable. Please verify that your email address is correct in your account settings and try again. All settings and passwords are correct as I can receive and send from all my different accounts using browser. I can send emails from my accounts, on my iphone, though not using Thunderbird on iphone. Account settings and passwords are the same on the phone.

Solved 1

request.

I have a request. Please make it easier to send feedback to the developers. I don’t want to have to log in to the forum every time just to ask someone who might not even … (read more)

I have a request.

Please make it easier to send feedback to the developers.

I don’t want to have to log in to the forum every time just to ask someone who might not even be an expert.

I’m Japanese and don’t speak English, so the English forum is difficult for me to use.

It’s a hassle to have to post on the forum like this just because I can’t easily send feedback in my local language.

I have two pieces of feedback I wanted to share this time.

1. Sometimes when I open Thunderbird, I get an error message saying it can’t load because there are too many accounts. Is this because it’s trying to check them all at once?

Please have it load them one by one in order. Or, please add an option in the settings to do this.

2. Messages marked with “Re:” are replies, right?

Let’s say my account is “Apple.” If I reply from “Apple,” a message marked “Re:” should remain in the “Apple” folder. From the recipient’s perspective, replies to emails from “Apple” should also come from “Apple.”

However, there were emails where I was recorded as having replied from a different account, even though I don’t recall switching accounts when replying.

So, from the recipient’s perspective, it looked like the email came from a stranger, and they replied asking me to identify myself.

While it’s not impossible that I might have changed the address by mistake while half-asleep, I’m reporting that there were instances where I was recorded as replying from a different address even though I don’t remember making a mistake.

I just want to share a request and a report, so there’s no need to reply.

Translated with DeepL.com (free version)

要望です。

開発者にフィードバックを簡単に送れるようにしてください。

いちいちフォーラムへログインして、素人かもしれない人に訊きたい訳ではありません。

私は日本人で英語が出来ませんので、英語のフォーラムも使いにくいです。

簡単にローカル言語でフィードバックが送れないから、こうしてフォーラムで投稿しないといけないのは手間です。

今回送りたかったフィードバックは二つです。

1、サンダーバードを開くと、アカウントが多いからロード出来ないとかエラーメッセージが出てくることが時々ありますが、一度に確認しようとするからでしょう?

一つずつ順番に読み込むようにしてください。 もしくは、設定で、そのように出来るようにしてください。

2、Reが付いているものは、返信したものでしょう?

アカウントがリンゴだとします。 リンゴから返信したら、リンゴの中にRe付きのものが残るはずです。 相手からしたら、リンゴから来たメールの返信もリンゴから来るはずです。

しかし、返信する時にアカウントを変えた覚えがないのに、違うアカウントから返信したことになったメールがありました。

なので、相手からしたら、知らない人からメールが来たことになり、誰だか分からないから教えてくださいと返信が来ました。

ねぼけて返信時にアドレスを変更した可能性も0ではありませんが、間違えた覚えが無いのに違うアドレスから返信したことになったものがあったことを報告しておきます。

リクエストと報告を伝えたいだけなので、返信は不要です。

Solved 1

How to stop Thunderbird from Automatic Get of Email when starting Thunderbird

I have Thunderbird 146.0.1, using 6 email accounts with POP. Two questions: 1) Whenever I start Thunderbird, it retrieves only a subset of the email accounts which I h… (read more)

I have Thunderbird 146.0.1, using 6 email accounts with POP. Two questions:

1) Whenever I start Thunderbird, it retrieves only a subset of the email accounts which I have defined to Thunderbird. Some accounts retrieve ALL, and other accounts retrieve NONE. I also have the extension "Get All Mail" and when I click that it retrieves ALL the email, including the email that the Thunderbird base program didn't retrieve. How can I get Thunderbird to get ALL the email?

or alternatively...

2) Can I somehow disable the Automatic Retrieval of Email when I start Thunderbird? ... and rely solely on the "Get All Email" extension.

Solved 2

Desktop Thunderbird no longer downloading from Yahoo email account to Inbox, but does Send messages out

Desktop Thunderbird no longer downloads mail from Yahoo though it did until 2 weeks ago or so. Now when checking for mail, I only see a "Local Folders: Checking Inbox fo… (read more)

Desktop Thunderbird no longer downloads mail from Yahoo though it did until 2 weeks ago or so. Now when checking for mail, I only see a "Local Folders: Checking Inbox for new messages" (screenshot) that eventually disappears after a while with no download. I can still send messages out from Thunderbird through Yahoo. I have done the "Please check the following before asking for support" : 1. I can log into my Yahoo account via the web and am using the same password 2. I only have one Yahoo account; all the other accounts work fine 3. I can send mail from Thunderbird through my Yahoo account with no problem 4. OAuth2 is active and can successfully establish a secure connection (screenshot) 5. Cookies are enabled with no exceptions (screen shot) 6. I do not use a VPN 7. Version is 151.0 (screenshot) 8. I checked the Error Console messages when Checking Inbox was active (screenshot) but do not understand it

I blocked out information on non-Yahoo accounts and email subjects on screen shots

Solved 3 27

emails from multiple accounts into one inbox

I have 3 email accounts and I would like to download all three to one inbox. The only way I have found that I can do that is to have Gmail forward to my non gmail accou… (read more)

I have 3 email accounts and I would like to download all three to one inbox. The only way I have found that I can do that is to have Gmail forward to my non gmail account which is currently set up as my main account. What is currently happening is I then am downloading duplicate emails, one from Gmail and one from the account the gmail was forwarded to.

Ideally I would just like to down load one copy of the email into my main inbox. TYIA Cindy

Solved 3 18

Ddelete mail from the server.

Gidday I have been using Thunderbird for sometime and recently had to re-install the program so now I have the latest version of it installed but the program isn't remov… (read more)

Gidday I have been using Thunderbird for sometime and recently had to re-install the program so now I have the latest version of it installed but the program isn't removing the emails from the server. I can't locate the "delete from server" setting anywhere in the options. I have searched everywhere for an answer here and on the iterweb so would appreciate if someone could provide help please. cheers col

Solved 4

Why are urls to places in the same received message unresponsive?

I receive a message with Urls at the beginning which are supposed to take you down the page to other places in the message However the Urls are unresponsive Urls that a… (read more)

I receive a message with Urls at the beginning which are supposed to take you down the page to other places in the message However the Urls are unresponsive

Urls that are supposed to take me to my browser work

Thanks in advance for any help

Solved 5 45

Received mail not shown

Because it was referred to, I discovered having received an email The sender had taken the easy way - for him - by replying to a message from 2024, of which I am one of … (read more)

Because it was referred to, I discovered having received an email The sender had taken the easy way - for him - by replying to a message from 2024, of which I am one of the recipients. I did not see a notification, nor did it show in the received mail folder, which is orderd by date, newest on top. Ultimately I found it attached to the original mail from 2024. Is there a way to get a notification, handle such messages as separate mail and show them at their appropiate place in the received mail folder?

Solved 3 45

TB prints/shows unwanted text/information

Hi, TB recently prints unwanted text/information, this also happens while forwarding certain e-mails. As shown in the attachment TB wants to print seven pages although th… (read more)

Hi,

TB recently prints unwanted text/information, this also happens while forwarding certain e-mails. As shown in the attachment TB wants to print seven pages although the original mail has only one.

What can we do?

Thank you in advance.

Regards

Jens Hollenberg

Solved 4 45

changing imap protocol to pop3 default protocol to download mail does not use pop3

I want to change the default download protocol accessing the mail server from imap to pop3. I went into the account settings & changed the default selection from ima… (read more)

I want to change the default download protocol accessing the mail server from imap to pop3. I went into the account settings & changed the default selection from imap to pop3. But the change does not take effect. Tbird still accesses the server using the imap protocol.

Solved 5 36

SMTP configuration

I have been using Thunderbird with two POP3 Hotmail accounts for some time and I am trying to set up a third account with exactly the same configuration. However, both th… (read more)

I have been using Thunderbird with two POP3 Hotmail accounts for some time and I am trying to set up a third account with exactly the same configuration. However, both the automatic and the manual configurations failed. The new account receives mail, but the outgoing smtp server config seems to have a problem. Sending messages times out or keeps prompting for a new password.

The Hotmail account has POP3 and IMAP enabled. Thunderbird is set to receive all cookies. I cleared history and cache after every attempt and also temporarily disabled the firewall.

Any suggestions about what the problem could be?

Solved 29 275

Email will not send.

Email will not send. Message-- "Sending of the message failed. An error occurred while sending mail. The mail server responded: Email rejected. Please verify that your em… (read more)

Email will not send. Message-- "Sending of the message failed. An error occurred while sending mail. The mail server responded: Email rejected. Please verify that your email address is correct in your account settings and try again." I am not sending to another person but testing with my personal email. Thank you.

Solved 10 100

Help configuring alternate/secondary identities

I have connected a Google Workspace (Gmail) account to Thunderbird, let's call it scott.harper@myorg.org. I am able to send, receive, and reply from this account as expec… (read more)

I have connected a Google Workspace (Gmail) account to Thunderbird, let's call it scott.harper@myorg.org. I am able to send, receive, and reply from this account as expected.

In my Google Workspace configuration, I have an alias address forwarded to my account, let's call it info@myorg.org. I receive messages addressed to "info" just fine. But when I send or reply to messages addressed to "info", I'm running into a problem.

In the Account Setting I opened Manage Identities, and added info@myorg.org as an alternate identity. I then edited the Private Data for that identity so that the "Reply from this identity when delivery headers match" option is checked, and set to match info@myorg.org. See attached image.

When I reply to an incoming message, the From field appears to be (sort of) correct... it shows from info@myorg.org, but next to it (in italics) is the primary account identity, scott.harper@myorg.org. See the other attached image. This is also the case when I compose a new message and select the info identity.

In both cases, when the message arrives at the destination inbox, it is from scott.harper@myorg.org instead of "info".

I'm assuming I don't have the matching rule, or some other setting configured correctly. Would appreciate any other tips/ideas.

Solved 3 45

Same incoming message reloaded in endless loop

When I start Thunderbird, the same message is downloaded each time. The status bar then reads "Downloading message 2 of 17," except that 17 is now up to 27. Thunderbird r… (read more)

When I start Thunderbird, the same message is downloaded each time.

The status bar then reads "Downloading message 2 of 17," except that 17 is now up to 27.

Thunderbird remains in this state. No second message is ever downloaded.

When I close down and restart Thunderbird, it's Groundhog Day all over again.

Trying "Clear Recent History" has no effect on the issue.

I am on Thunderbird 150.0.2 (64-bit) on the release update channel. I'm on a Windows 11 HP Envy Laptop purchased in July 2025.

Solved 2

Cannot add 123 Hosting to Thunderbird

Not sure what has happened to my PC but lost my Thunderbird app. Reinstalled but cannot get my emails working again. I only get emails up to 13th May 2024; I guess when … (read more)

Not sure what has happened to my PC but lost my Thunderbird app.

Reinstalled but cannot get my emails working again. I only get emails up to 13th May 2024; I guess when TSO Hosting finished?

I am now on 123 Hosting.

I have a note that SERVER for both i.e. Incoming and outgoing is:-

sxb1plzcpnl503269.prod.sxb1.secureserver.net (smtp as prefix)

Where and in what format do I enter theses server details.

I think I also need to get into cPanel but the URL I have will not work:-

https://sxb1plzcpnl503269.prod.sxb1.secureserver.net3 (:2083)

Sorry but I am confused; don't get old!

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income messages take a long time, pop up in folder for a glimpse or short time, suddenly the folder is totally empty, all have gone

Hi, very nice of you to listen to my problem. It already startet some days ago when I realised that it took very much time to receive mails, in some the content still k… (read more)

Hi, very nice of you to listen to my problem. It already startet some days ago when I realised that it took very much time to receive mails, in some the content still kept hidden. To work with the about 60 mails listed in the Income-folder, and select some to read the text I was surprised to realize, that in the next moment the folder was empty, none of the mails could be seen on my Windows laptop. I had to switch to the mail-server with Vodafone to see me mails. This situation occured with all folders on 2 Laptops with Windows 10 and windows 11. What could I do ?

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Imcoming emails are not displayed correctly and links don't work.

Hi. I have four gmail accounts and use a desktop pc runnings windows 11. I have been using thunderbird as my desktop email client for many years, but recently, somethin… (read more)

Hi. I have four gmail accounts and use a desktop pc runnings windows 11. I have been using thunderbird as my desktop email client for many years, but recently, something has changed. My incoming emails are not formatted correctly and the links in them do not work. I'm not sure I am saying that correctly, so I will attach a screenshot. I would love some advice on how to fix this! Thanks, Cheryl

Solved 5 9