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Have been trying to set up some pop3 yahoo mail accounts on a new computer. I have used automatic configuration. I have used manual configuration using the data from my old computer. I have checked the configuration settings on both Yahoo and Thunderbird sites. In all instances Thunderbird verifies the account is valid, but the next window asks for my yahoo username and password. I cannot get passed this stage. I have tried entering my yahoo password and I have also tried the app generated password from Yahoo, all I get is a Yahoo "something went wrong" message. Interestingly I did manage to get one of the accounts to work yesterday, but I must have tried no end of different permutations and I have no idea which one eventually worked.

Something's wrong with my Tumblr. When Firefox crashed before it updated, my Tumblr has completely broke (It won't show any notifcations that someone posted, the activity is stuck at 2 and community at 6). PLEASE HELP

Today is 01.16.2026 Hi Volunteers, thank you for the service you are providing Thunderbird users.

I didn't see a topic called Security, so I chose Settings.

For Thunderbird version 146, what specific version of LDAP is being used?

Regarding which LDAP version is the most up to date, I found this: https://pkg.go.dev/github.com/go-ldap/ldap/v3@v3.4.12

My concern is about LDAP's security. I believe it is reasonable to think that the latest available version of LDAP would have the latest and most up to date security patches applied.

I would like to feel secure knowing I have the protection of the newest version of LDAP which affords the best security protection available for Thunderbird laptop version 146.

However I have been unsuccessful in determining if Thunderbird 146 is using this LDAP latest version. Could you help me learn if Thunderbird 146 is utilizing the latest version of LDAP that is available? Thanks in advance.

Yes I know I am a bit verbose.

Not sure which "topic" best describes my question, so . . . .

OS: Windows 11 Thunderbird 140.1.0esr

I have been using T-bird for several years, and have made to changes to configuration in recent memory. Beginning today, when I try to send an email through my Comcast account, it fails with the following message:

“An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: resomta-h2p-555031.sys.comcast.net resomta-h2p-555031.sys.comcast.net EXMTP server not available.”

The outgoing SMTP server is configured as follows: Outgoing server: smtp.comcast.net Port: 465 Security: SSL/TLS

For comparison, sending email from my Android phone, using the Gmail client with the same server specs, also fails, thought it gives no information.

For more comparison, I configured Outlook to test with it, and it was able to send successfully. I noticed in setting it up that it used the same server name, but with port 587. Armed with that information, I changed the port setting in T-bird to 587. With that change, the send still failed but with a different error:

Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.comcast.net was lost in the middle of the transaction. Try again.

Any help is appreciated.

I have two email accounts, one is hotmail.com, the other is on outlook.com

The SMTP for the outlook account works fine, but Thunderbird puts that same smtp details into the Hotmail account smtp. That also puts into the Hotmail username, the outlooks email address.

If I try to send an email using the Hotmail account, I get a message saying 'Hotmail can not send using xx@outlook.com

If I use the settings to make the username xxx@hotmail.com, it puts that into the smtp of the outlook.com address then that will not send giving the same fault. This has only started this last couple of days, nothing changed in the settings.

This only occurs on my Desktop. On my laptop with same settings it works fine.

Thunderbird is showing up to date?

Help Gerry

How do I restore selected emails or folders from a backup made with Export? I only want to bring in 30 or so (which were accidentally deleted). I'm using a Windows 11 PC.

I'm nervous about reloading the backup because it was some time ago (and I *really* don't want it to download new emails).

Just updated from Ubuntu 20 to 24. Seems Thunderbird has not been auto-updating. I have three email accounts, each with multiple folders and sub-folders. I have three windows open, one for each account because they are for three purposes. Before the change each full height window could accommodate all the folders for its account (plus the un-expanded two lines for the other accounts). Now the folder lines are further apart and they don't fit so I can't tell when a new message arrives in one of the other accounts. Is there a setting for the spacing of the folder listing, and if so, what is it? Similarly I can not see so many messages listed in the classic layout without enlarging that pane and reducing the space for the messages. The spacing is larger than it used to be. Does it have a setting?

Thanks, David

I have found this article to Unify your POP email accounts with a global inbox

https://support.mozilla.org/en-US/kb/unify-your-pop-email-accounts-global-inbox

Is it possible to do the same with IMAP email accounts??

Many thanks in advance

Could anybody help me? Since yesterday morning I have not been able to send or receive emails on Thunderbird.

I have two computers: a laptop and a desktop. On both of them I use Thunderbird as my main email service. On the desktop I also have MS Outlook. I am able to send and receive emails on the desktop on MS Outlook.

Error message on the desktop when I try to send a test email: Sending message failed. The message could not be sent because the Outgoing server (SMTP) mail.rushmore.com failed. The server may be unavailable or refusing SMTP connection. Please verify that your Outgoing server (SMTP) settings are correct and try again.

Error message on the laptop when I try to send a test email: You are about to override how Thunderbird identifies this site. Legitimate banks, stores, and other public sites will not ask you to do this. Location: mail.rushmore.com:587 [get certificate] This site attempts to identify itself with invalid information. Outdated information The certificate is not currently valid. It may have been stolen or lost, and could be used by someone to impersonate this site. [check] [Permanently store exception]

    [Confirm Security Exception] [Cancel]

Interestingly, yesterday I was receiving the same error message on the desktop computer, except the number under Location mail.rushmore.com: was different (not 587). I do not remember what this number was.

My current SMTP server settings: Server name: mail.rushmore.com Port: 465 (Default: 465) Connection security: SSL/TLS Authentication method: Normal password User Name: halina@rushmore.com

Please let me know what I can do about this. Thank you!

Halina Hladysz

Please help me! I have expanded on the information which I sent few days ago.

1. Problem which needs to be solved: Starting on Saturday (Oct 18th) morning I have not been able to send or receive emails on Thunderbird. (I turn down my entire network for the night. On Friday evening, before I turned it down, I was still using Thunderbird without any problems. On Saturday morning, after turning the network up, Thunderbird did not work.)

I have two computers: a laptop and a desktop. On both of them I use Thunderbird for most of my emails. They have Windows 10 operating system. Thunderbird stopped working on both computers and at the same time.

2. MS Outlook still works On the desktop I also have MS Outlook. I am able to send and receive emails on the desktop on MS Outlook. There was no break in this software package working.

3. What happened in my email correspondence prior to this problem For about one week prior to Thunderbird’s stopping to work I received numerous emails – which appeared to be sent from my email address xxx@rushmore.com. These emails were pretending to be sent from various companies, including some warnings about my email which needs to be reconfigured or something like this. I deleted all these emails immediately without clicking on any links they would send. Unfortunately, my email provider (BluePeak company) did not catch these emails; they should had been sent to the SPAM folder on their server.

I suspect that maybe some of these emails, or one of these emails, created this problem. A virus?

I have done a full virus scan and it found no problem.

4. Error messages on the desktop when I try to send a test email:

See attachment number 1 for a screenshot.

When I click on [Cancel] I get this message:

See attachment number 2 for a screenshot.

Sometimes instead of these two error messages, I receive a completely different message: see attachment number 3.

5. Error messages on the laptop when I try to send a test email:

On my laptop the error messages are the same, except the number in the [Location] section is different. 587 on the laptop, 465 on the desktop.

6. My current SMTP server settings: Server name: mail.rushmore.com Port: 465 (Default: 465) Connection security: SSL/TLS Authentication method: Normal password User Name: halina@rushmore.com

Could one of you help me, please? I am completely “frozen” with being able to work on some of my projects; one important is organizing a big event and all my communication (high number of emails by now) are on Thunderbird.

Thank you!

Halina H.

Hi Thunderbird, At the weekend we accidentally completely deleted some Gmail emails from Apple Mail . These were also deleted from Thunderbird (2 Gmail accounts) on our PC. We recovered the emails, in the process having to change my Google Password. Whilst the deleted emails returned, one Thunderbird Gmail account was not receiving new incoming emails. (one account is) The emails are arriving as normal into Gmail. After various unsuccessful attempts to to connect to the server I deleted the defective Gmail account from Thunderbird, using the Red Button in account settings, hoping to then be able to reinstall it as a new account. When I attempt to reinstall the now "deleted" account I get the yellow "Unable to log in at Server" message. . The password I am using to add the account is the same as the one I use to sign into that account on Gmail (set on Monday), but it does not seem to be working on TB. I tried the trick of not putting in the password when setting up the new account but this did not work either. I am using TB 140.6.0esr Any suggestion please John

Bonjour, J'ai créé une nouvelle adresse gmail, qui fonctionne depuis le site de google. Quand je souhaite l'inscrire pour l'utiliser via Thunderbird (nouveau compte/adresse mail), tout se passe bien et j'obtiens le message "Configuration trouvée dans la base de données des FAI de Mozilla". Je clique ensuite sur Terminé et j'arrive à une fenêtre "se connecter avec Google" qui affiche ma nouvelle adresse mail. Quand je clique sur "suivant", j'obtiens le message "erreur 400 - le serveur ne peut pas traiter la requête, car son format est incorrect". Pouvez-vous m'aider ? Merci d'avance. Laurent Lapchin

Unable to send emails. A message appears saying the outgoing server (SMIP) smtp.gmail.com timed out. Try again. This keeps repeating. What can I do?

Hi I just saw the new info on backing up my Firefox data. It sounded good, so I tried it. However I do not see 'Manage Backup'. Instead it asks 'Choose backup file'. I have never knowingly backed up Firefox, so I do not know where this backupfile is located... How can I find it? How do I create a new backup file? Many thanks An