Thunderbird: форум сообщества

When I open an email and that email has a tab you can tap and open, the window opens on the far left side of the screen an I am unable to see or drag it. How do I make it open in the middle of the screen?

I am an emeritus professor using the UVM email account tosler@uvm.edu<mailto:tosler@uvm.edu>, which I have used for many years. I use Mozilla Thunderbird (current version, “Eclipse”) as my email client and my account is configured for UVM’s Microsoft 365/Exchange Online service. After my most recent required yearly password change, although I can still receive email in Thunderbird, I can no longer send email. When I attempt to send a message, I consistently see this error: “Login to account ‘smtp.office365.com’ failed. Login to server smtp.office365.com with username tosler@uvm.edu<mailto:tosler@uvm.edu> failed.” Here are my current settings:

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Incoming (IMAP):

    *

Server: outlook.office365.com

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Port: 993

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Connection security: SSL/TLS

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Authentication method: OAuth2

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Username: tosler@uvm.edu

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Outgoing (SMTP):

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Server: smtp.office365.com (I have also tested smtp.uvm.edu with the same result)

    *

Port: 587

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Connection security: STARTTLS

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Authentication method: OAuth2

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Username: tosler@uvm.edu

I have reinstalled Thunderbird, and I have removed all saved passwords and tokens for outlook.office365.com and smtp.office365.com, restarted the program, and completed the Microsoft/UVM sign‑in prompt again. IMAP continues to work and mail arrives normally, but SMTP authentication still fails with the error above. Because:

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The configuration matches Microsoft 365/Exchange Online client‑submission settings, and

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IMAP with OAuth2 works, while SMTP with OAuth2 fails,

it appears that this may be a server‑side policy or mailbox setting, rather than a client configuration problem. What are my options? Does the University of Vermont have to change some setting on their end on my behalf? Thanks. -turner

I accidently unsubscribed my current calendar. It does not list anymore, I do not know how to list unsubscribed calendars. How to re-subscribe it? (Window 11 w/latest Thunderbird). thanks very much.

After recent update I can no longer send email on any of my accounts. A message popped up when I opened Thunderbird after the update stating I would need to change some settings, but message disappeared before I could read it all and could make changes. I need to know what settings I need to change to restore outgoing mail ability. my Email accounts are Gmail and Yahoo.

I'm changing email servers and need the best way to automatically backup my complete(multiple domains and user accounts) emails in thunderbird to a separate drive or local machine before changing servers. I would prefer an automated way to do this so I can continue to update backup file routinely

I already back up my profile regularly to a remote drive

Thank you in advance for any help you can give.

I want to set one account that's used every time "+ New Message" is clicked, regardless of which account or folder I'm in.

Is that what the Default Account is for? If so, how do I set it?

This support article says there's an Account Actions button that offers Set as Default. But I don't see it.

There is a gold star next to the desired account name in the account list in Account Settings, so perhaps this has already been set as the default account. But sent emails are not defaulting to it.

Any help reducing my confusion would be appreciated.

When Thunderbird injects a link preview into a message, it changes the text composition from Body Text (my norm and default) to Paragraph. This styling change persists even after I delete what look like the entire preview.

My fix for the current message is to select all and reestablish Body Text, then clean up left over mess.

My overall fix is to uncheck Settings > Composition > Add link previews when pasting URLs

Clearly HTML is required to create a graphic preview box in a message. I do not recall having turned link preview on to begin with, so I'm feeling opted in. Do Thunderbird updates download with this option turned off? ___

Another reason I eshew link previews is that they appear to establish connections to online assets without asking. How is this safe? As a software developer - and simply as a user - I have occasion to send people links that I don't want to connect with. To pick an easy edge case, what if I'm reporting a phishing or malware site? Just because I type or paste an URL into an email message doesn't mean I want to download anything from that source.

Curmudgery aside, I'm grateful for your help as always. Paul

How do I write vulgar fractions, e.g. one half, one quarter, in Thunderbird? I don't want to use 1/2 or 1/4, just a neat way of writing them in the traditional way with one number on top of the other.

Thanks.

I made a folder and called it April. One day the folder just disappeared. No one seems to help me recover the folder and i need it. Once I moved emails into that folder they are no longer available in my inbox. SO if you know how to recover my folder help, or if you know how to recover emails that were sent to a folder, that would work also. I use Windows 11 and I have the most recent release of Thunderbird. I use Charter.net as my isp which is pop. Thanks,Charles

I've been using Thunderbird for a few months now and I have been marking email as "spam" or as "not spam" but I am finding that a lot of addresses that I mark as "not spam" still end up in my spam folder, even after marking them several times.

What I have been doing is restoring the email that I want to read back to the inbox and marking it again as "not spam". Some email that I mark as spam does get moved to the spam folder, which is fine.

Is this was happens for some considerable time or am I getting something wrong?

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?

First - sorry if the post is messy, but I don't see a Preview option today

PRELUDE: When I create a email to send to Joe@hotmail.com, on clicking SEND, a popup wants a password for a different account:

EXAMPLE: (emails are faked here for privacy)

Assume I have the following email accounts:

1. john@fakes.xy
2. jane@morefakes.vc
3. fred@deftly.xc

I compose a email to john@fakes.xy. I click SEND, and there is a popup stating:

Status: Sending message... Progress {progress bar}

and second popup with :

Enter your password for jane@morefakes.vc on mail.{IP name}.com

and a third popup with:

Login to server mail.{ip-name} with username jane@morefakes.vc failed

I have attached a screen cap (redacted) as seen in actual.

SUMMARY:

• When addressing email to Joe, upon SEND, the errors show password to use is listing a different account.

I ran Troubleshooting Mode with no errors, except, same thing. Wants password from a different email account.

Thanks for reading this, ~r

hello I have bought with donation thundrbird, but is is in the wrong languange. I am installin g italian now, ant it asks me to contribute again. Can you reimburse the first payment thanks you laura bonanni

I have 2 accounts. One account is for my normal email address, which contains my usual "Name+Surname@gmail.com The second account is for a fake name (as used on this forum): oldgrantonian@gmail.com

In Thunderbird, my normal email address works fine.

But the last email in my fake email account was on 16/02/2026. I can't send emails from the fake account.

The online version (mail.google.com) is fully up-to-date. I can send and receive emails in both accounts.

I would be grateful for any advice on how to restart the fake account.

Thanks

Hi! Since I've installed Thunderbird on my new computer with Windows 11, I've now twice experienced the disappearance from my inbox of a bunch of emails. Never had this before with Thunderbird. Could it be something needs doing in Settings (I couldn't find any relevant options)? The emails weren't among the newest, but they were all important.

Hello everyone. Thanks for all your support.

A few weeks ago I started noticing a pop up window was occurring every (approx) 5 minutes in Thunderbird suggesting that I run a compact to save 992MB. I assumed this would stop happening after a few weeks and a few updates from Mozilla, but the problem has remained, so I'm coming here to ask about it.

Context: I'm on Windows 11. I have multiple email accounts that my Thunderbird reaches out to. At least one of the accounts is retired so reaching out to its historical server fails.

Reproducing: For me to reproduce it, I run the compact. Quit Thunderbird. Start Thunderbird. It reports 992MB can be freed. I let it compact. The main inbox disappears and reappears. I wait a few seconds and restart Thunderbird. It again tells me that it can save 992MB by running a compact.

What I've tried: I've tried repair on the inbox folder of the account I'm typically in. That didn't help. I have many other folders across many accounts and not tried to repair any other folders. I've searched the Mozilla help system.

Logs: It seems to me that a compact is probably failing but I don't know where to look for evidence of the failure.