Thunderbird Community Forum

I am working in Japanese but this site changes to English version and I cannot ask question in Japanese. So I do not know how English words are shown but I try to translate Japanese message to English. I have been using this Mozilla thunderbird for many years and have installed in several PC's. And now I bought a new PC Win 11. I downloaded software and message like that Account setting is found in Mozilla ISP data base. I proceeded as instructed and acknowledged warning. Then message is shown like this cannot logged in server, check if username, password or setting. I renewed password but still same message is shown. I would appreciate kind help.

I tried importing my Outlook Classic address book. As you can see from the attachment, I really messed it up!. I am not technical at all, I wasn't sure if I needed to import my contacts or my address book. I think, but am not really sure, that I exported my .pst file, address book to a csv vile. Can anyone one straighten me out? If I have to start over, how do I delete the mess I created without loosing all of my other settings? Thank you very much 😊😊😊

The https://support.mozilla.org/en-US/kb/thunderbird-and-yahoo article is ambiguous. Does mailnews.oauth.usePrivateBrowser only need to be set to true if you have 2 accounts from the (Yahoo, AOL, ATT) set? Or if you have any 2 accounts, including, for instance, 1 Yahoo! account and 1 Gmail account?

I had a Gmail address set up in Thunderbird on my old computer (Win 10). I had to get a new computer with Win 11. I have my Earthlink addresses set up okay.

But I've been unable to properly set up the Gmail address. I enter all the information, but the account vanishes from T-bird. All I have in Thunderbird is a Thunderbird Tab with Google info. It's a full page which might not come out clear with a screenshot, so I'm copying what's on this Tab ....

Google Account

   <- Mozilla Thunderbird Email has some access to your Google Account

Access you’ve given to Mozilla Thunderbird Email Mozilla Thunderbird Email has some access to info in your Google Account, including info that might be sensitive. You can always remove this access. Learn about the risks

   Access given on:  April 20, 2025
   Web address:    https://www.thunderbird.net

   Mozilla Thunderbird Email can:  Read, compost, send, and permanently delete all your email from Gmail -
   This app wants permission to do anything you can do in your Gmail, including:  (Read, compose, Add,       

ETC.)

   If you remove access 
   You might not be able to use some Mozilla Thunderbird Email features.

Another TBird Tab has: Keep track of your connection with Mozilla Thunderbird Email Mozilla Thunderbird Email has some access to your Google Account To use some Mozilla Thunderbird Email features, you gave Mozilla Thunderbird Email some access to your Google Account. This access might include sensitive info. Etc,

BUT I don't see the gmail email account itself. It had been with the other accounts, but it's not there anymore. PLEASE give me step-by-step instructions so I can access this gmail account.

Kami

Please assist,

Xfinity Logo Upgrade your email account at no extra cost

Your invitation to upgrade your C‍omcast‍.‍net email account to Yahoo Mail is still waiting for you. Move your email account to the Yahoo Mail platform today to start enjoying better features, enhanced security and a top-rated mobile app. Best of all, we’re offering you this upgrade for a limited time at no additional cost.

Sign into your email through webmail at connect.xfinity.com and follow the prompts to accept Yahoo’s terms of service. It’s quick, easy and secure.

What stays the same

   Your email address
   Your messages, folders, and contacts

What's new

   Simple sign-in with Yahoo Mail
   Dedicated support for your account
   Enhanced security and protection
   Built-in calendar and smart inbox
   Stay connected with their top-rated mobile app

The following email account(s) are eligible to upgrade:

   germainr@comcast.net

If you have more than one email account, you'll need to sign into each one that you want to upgrade.

Please note: If you use a third-party email app like Apple Mail, Outlook, or Gmail, you’ll need to update your app settings to continue accessing your email through that app after you move to Yahoo Mail. To learn more about Yahoo’s email service including third-party email settings, please visit welcome.yahoo.com.

================================================

How do I setup Thunderbird to accept this change? My current email addresses are: rdg_tech@comcast.net germainr@comcast.net

In addition I have AT&T as my internet provider and they set me up with a Yahoo email address that I do not use: acsl700a@att.net

In advance Thank You! Richard Germain

I use Thunderbird with AOL. I have a separate Yahoo email independent of Thunderbird. Do I need to do anything with respect to Thunderbird switching to OAuth2 with PKCE?

I had a similar problem. The Spam settings were being picked up by my ISP from my mobile. When I looked at the Spam on my mobile, I could mark each individual email as "Not Spam". When I did this, the email appeared in the Inbox not only of my mobile but of my laptop too. A new test email went straight into Inbox of both devices and not into Spam of either.

I hope this helps.

I got a new computer, and after installing Thunderbird, it took forever to get it set up with the information from my old computer. Now, the unified folders aren't working. All of my mail is going into each account's inbox. There's no option to choose anything on the unified inbox, only the same thing as the other inboxes have. Help, please!

On my PC - Initial problem was T-bird took forever to load and virtually all new msgs went to TRASH and I had to move to IN-Box. Per help from David - Saved off profile, and reinstalled thunderbird from thunderbird.net. No change. Then UNINSTALLED T-Bird (profile still intact). Now just attempts to open "Looking up imap.comcast.net", but won't open/connect and to close the app I must use WIN Task Master. Can't get to any msgs, etc. Also, in the past when I was able to open, the banner or bar at the top of the page had hundreds of email icons. I sometime have over 1000 emails in my in-box!! I have years worth of emails in folders on T-Bird which I don't want to loose. Help. Thank you. I have a "working" version (with the "trash" and slow loading issue per above) on my laptop, so I can access suggestions on that version of T-Bird. You could also send any suggestions to x@gmail.com

(PII redacted by moderator)

just installed thunderbird on my new windows 11 laptop (samsung galaxy book 5) and tried to add my comcast email account. i entered the address and password and it took me to an xfinity web page to validate my password for imap.comcast.net. since i'm not on my home network it send a code to my mobile phone which i entered successfully. it then asked my for the address on my account. i entered it and it told me it didn't recognize the address! I called comcast and finally got to speak with a human (no mI'veean feat). We verified that my xfinity account allows third party applications to access my email. That's pretty much all the help she could give me. i've run thunderbird on my home windows 10 desktop with no issues accessing my comcast email. Has anyone encountered this problem? does it have to do with windows 11 settings? any help would be appreciated.

Dears since yesterday i cannot download yahoo mails to thunderbird on my windows computer. when thunderbird gets new messages, a window pops up asking me for yahoo account name and password. when entered yahoo gives the following message: " Something went wrong. We could not sign you in. Try again from a different device." i use thunderbird 148.0 on windows 11 (out of china, with Astrill VPN - all other websites work normally with VPN). i have three different yahoo accounts, the first time thunderbird asked yahoo first mail and authentification went through, but it does not go through for the remaining two accounts. i verified that OAuth2 is set up for all accounts. password is correct (as i can still receive emails on iphone mail app). cookies can be accepted without any exceptions, can see the whole OAuth2 dialog panel. i did all steps for setting multiple accounts. i verified all accounts for POP and STMP server settings. also mailnews.oauth.usePrivateBrowser set to TRUE. After all this, it still does not work (i also restarted thunderbird and the computer), what else can i do? Regards Violaine

I have both a Microsoft 365 email account and a outlook.com email accounts. I'm using version 148.0. Both account set up just fine. When I delete an email from either account after a couple of seconds I get a message saying "The current operation on 'Inbox' did not succeed. The mail server for "the account name" responded; [TRYCREATE] The destination mailbox could..." that all I can read. Why?? It is only on the Outlook accounts. I have several other account set up and they all delete the emails.

Normally, I can right click and tell Thunderbird that this is NOT junk, however, when I do this, these emails go back into the inbox and virtually instantly return to junk.

This is from anyone's email address that arrives from one particular website: @legacydigitalagency.com

I haven't come across this issue since I started using Thunderbird 20+ years ago.

Hi, somehow thunderbird forced me to use OAuth for caldav and carddav. (v140 on linux) Unless I've probably missed something this approach doesn't seem to have considered that people might use more than one device. In the past I had an application password per device with my mail provider. That password covered imap, smtp, caldav and carddav. The application password I could set with a specific name at my mail provider. If the device was lost, compromised or whatever I just deleted that one application password at my mail provider, problem solved.

Now a regular thunderbird setup has the application password for mail and 2 OAuth records per device under "Connected Apps" at my mail provider. But it is not possible to see anymore to which device the OAuth record belong, as there is nothing device specific coming along with these OAuth records, just an IP.

With that perspective OAuth weakened my security options, as I can only guess which OAuth record I have to delete in an emergency case. Did anyone who implemented that with Thunderbird considered that people may have more than 1 device? Maybe even more than 5 devices?

That OAuth approach looks unmanagable to me. Is there a way to switch OAuth off in thunderbird, until it becomes more useable in >1 device setups?

Cheers Tjareson

Connection to pop.mail.yahoo.com times out and no emails are downloaded. A new windows appears from https://login.yahoo.com/ that I have never seen before asking for username and password but this returns a "something went wrong" error. Is there an update, or a setting change, that resolves this problem?

Thanks

Frank

This happens each time I open up T-Bird. Somtimes it is Yahoo.mail, sometimes it prompts to log onto aol.mail.com.

How can this be stopped?

________________________

desktop Win11 pro Thunderbird 148.0 (64-bit)

re: OAuth2 Authentication for Yahoo, AOL and ATT

My settings selections don't really follow your help descriptions to the letter,so..., also, I already have 2 accounts on 2 platforms and they seem to already be configured with SMTP outging servers using OAuth2.

I'm confused since I'm now on 140.8.0 and have not needed to change a thing, contrary to expectations set from T-bird app popup warning and Mozilla article.(?)

Hello! The other day everything worked as usual, and I shut down the computer for the night. The next morning, Thunderbird immediately crashed/shut down when starting each of the 2 profiles I always use. The 3rd profile, which is the default-release running a different email, still seems to work normally. Thunderbird 115.10.1

I have tried Windows (10) safe mode, as well as thunderbird Troubleshoot mode and working offline, but the issue continued to occur.

I'm at a loss now as to what could cause 2 profiles to suddenly cause it to crash. By the way, one profile is for a gmail account and the other one is for an Outlook account, so they don't seem to be related.

In case it helps, there were 2 Microsoft Visual C++ programs installed or updated, and updates to Microsoft 365 and Google Drive just before the problem started. These were all auto updates in the background.

Any help from the Community would be greatly appreciated. Thank you!

Hi everyone! Why do I get an error when I try to download messages - "Failed to save message. Check the spelling of the file name, wait a while, and try again"

And the most annoying thing is that after this error, downloading other letters stops and you have to manually search for that very letter, although there may be thousands of them... Please fix this!

I have been using Mozilla Thunderbird for decades and they have even contributed a small amount of money to Thunderbird periodically. Just within the last two or three days all of a sudden I have been unable to send emails with my phone. I receive emails, but I do not send them.

So I opened up a laptop where I did not have Thunderbird and set it up properly through Spectrum using the incoming and outgoing servers as mail.twc.com. and yes, just like on my phone. I continue to receive new emails, but even with the laptop I was unable to send an email.

I received the message"send message error sending a message failed. The message could not be sent because the connection to outgoing server smtp mail.twc.com was lost in the middle of the transaction. Try again."

I contacted Spectrum twice and both times they had me try to send a message through their Web server spectrum.net and that message did go through. Of course then their response is that this has to be a problem with the third-party app meaning Mozilla Thunderbird, and they can’t help with that at all. I sure would appreciate some help because I hate to walk away from Thunderbird as well as change my email address after all of these decades.