Thunderbird Support Forum

Dear Sir or Madam,

I have just migrated Thunderbird to my new CUBI desktop running Windows 11. I get security errors when I launch Thunderbird. My email provider The Messaging Company advised me to change server settings, which are now shown in the Troubleshooting Information page as account1 (pop3) pop.themessagingco.com.au:995 SSL/TLS Normal password smtp.themessagingco.com.au:587 STARTTLS Normal password true.

On launching Thunderbird I get the message Secure connection failed live.mozillamessaging.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate has expired. Error code: <a id="errorCode" title="SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE">SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE</a>

   This could be a problem with the server's configuration, or it could be someone trying to impersonate the server.
   If you have connected to this server successfully in the past, the error may be temporary, and you can try again later.

Or you can add an exception…

AND when I attempt to send an email I get warning that the SMTP server does not have a valid certificate. If I ask, in either case, to "Get Certificate" the response is that the site attempts to identify itself with invalid information.

I have "tried again later" over two weeks, and nothing has changed.

The Messaging Company is a fairly large email provider: it seems strange that its security is incomplete. However, I am not happy to just set an exception and over-ride these errors without doing all I can to check that there is not something screwy going on. I really value using Thunderbird, and The Messaging Company's advice that I should just use webmail is not at all satisfactory: I keep everything on my computer or backed up to a portable drive here.

Please: is there anything I can do or should know to fix this problem?

Best Regards, Margaret Mackisack

I would like to change my account settings for my hotmail account, but when I try to change from Normal Password under Outgoing Server (SMTP) there is no option for Oauth. Is there something I can do to enable this option.

My Local Inbox suddenly started to arrange itself by group according to correspondent. I can't get the emails back into chronological order. I can't work with a mail program that doesn't give me my messages in chronological order, with most recent at the bottom. If I did something to cause this change, please tell me how to undo it. I have about eight email addresses, and they all feed mail into the Local Inbox.

With about 60G of accumulated e-mail in several Microsoft accounts, I moved all accounts into T-bird and put most in local folders. This somehow became over 600G in size. Everything works and compacting seems to be getting done since it's been working some weeks now. Yet this ten-fold increase in size is unwieldy and very difficult to backup. Perhaps related, I notice that M'soft's "new" free Outlook app is present and perhaps running on this computer. And all the e-mails I send from my main Hotmail account are listed twice in the T-bird sent folder. About half of the times I start T-bird, I get a message saying that login to server outlook.office365.com with username xxxxxxxx@hotmail.com failed; the other accounts never do this. T-bird offers to retry, but that usually ends with a repeat of the same message. I've learned that if I let it open, with time, the e-mails do appear, though I don't know how or why. I've also been using Libreoffice successfully for months now though I doubt that anything to do with this. T-bird nicely solved the original e-mail oversize problem I had with Microsoft's size limitations and I'd appreciate advice on how to deal with what's happening.

Latest Thunderbird update has placed the From and Subject fields on two separate lines in the classic view. Other views I have tried do not put these two fields on the same line which is what I have had for decades. I have essentially lost half the space I had to view contents of my email inbox and folders. How can I modify my view back to the way it was before with From and Subject on one line giving me a more compact view of things?

On the top of the left side of the incoming email page, next to my email address, I would like the following alternatives to appear: answer, answer all, forward . . . I have had them before, have never had a problem with them, but I must have pressed the wrong key as now I get the following instead: an icon with a pin-up button, a phrase about filtering, and then five icons with an envelope, a star, a notebook . . . What do I need to do to recover the original layout?

I was getting warnings from my e-mail server that I was near the mailbox size limit, and Thunderbird displayed a percentage bar in the lower right corner. I've deleted a lot of large messages and want to see how far I am from the limit now, but now the bar isn't displayed. Is there a way to refresh this? Or is it a warning that's only pushed from the server?

(Unfortunately, my webmail site doesn't compute the size correctly and shows me at over 400%, so I can't see the actual size there until the server sends me another warning.)

Microsoft sent email last night announcing the end of "Normal Password" for Hotmail, and warning that Hotmail would REQUIRE "modern authrentication" beginning 9/16. I have personal desktop subscription to Microsoft 365. I have set Microsoft account to 2FA and checked in Tbird that cookies are enabled.

I have spent hours and days trying & failing. With server imap-mail.outlook.com using OAUTH2, Thunderbird won't sync and shows message saying that server doesn't support the authentication protocol please enter another one. With 2FA still turned on and using Normal Password setting and entering an App Password from Microsoft, the Imap connection is fine about 85% of the time, needing re-entry of the App password about once a day or so (usually requires several tries until App Password gets accepted.)

The 0AUTH2 fails with Norton Smart Firewall turned Off or Turned On-makes no difference.

(Sending email with Outlook and 0AUTH2 DOES work okay.)

I've also tried Imap connection with a different server: Outlook.office365.com, using 0AUTH2.

In this case, Tbird shows me a Timeout error and never makes an Imap connection to the server.  

I've been limping along with the app password, and "normal password" authentication, but now Microsoft announces they will stop accepting connections that are not 0Auth2 ("modern authentication") from Tbird or any other software after 9/16. The clock is ticking. I've tried every remedy I've seen online from Tbird or from Microsoft. Nothing has yet allowed a QAUTH connection for Tbird to a hotmail IMAP server. Please help! !

Hi, Set up a thunderbird account on advices from experts due to current issues with BT Email in UK. Have set up an account which is working but the contacts are corrupted? In personal address book loads of hash tags and symbols with no details. In Mac OS x has names but most only have telephone numbers. Also have multiple names for same contact as I tried to download again! I use an Apple IMac PC. Is there any easy way to remove all contacts and what is the best way to try again and get contacts to import with full information? I am not very Techy so plain English with any solution would be appreciated. Still have BT account and downloaded to a CSV file when trying.

I have an address in my address book that I received many emails from. About a month ago they started going to the bulk folder. How do i get that address restored so i can receive emails from them?

This new version of Thunderbird (115.12.2) is not the best. The Composition toolbar doesn't exist when typing a new message and I no longer have a menu bar when typing a new message.

Another issue is on replying why do these sideways "V's" show at the beginning of each line of the senders email when replying. Sometimes it will be just a black line all the way down. When I saw those I felt like I had woken up in 1995.

I am using Windows 11 Pro.

Thank you

Hello --

Not sure when this happened.

Got 2 email accounts, account X and account Y. All was working fine until today, 6/27/24. Both have different outgoing SMTP servers.

Now I am trying to send, it is asking for passwords, which I have and is 100% correct. In fact, if I put in wrong password it tells me, so I know it is communicating. When I put in the correct password, I get a timeout on BOTH SMTP servers.

I disabled Norton Firewall.

Works fine from another PC app (poppeeper) and from my android (k9 mail). Both accounts are IMAP.

Neither SSL/TLS or STARTTLS makes a difference. Nor did a re-boot.

TB 115.12.2 (64 Bit) on Windows 10

Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) mailroom4.hostrocket.com timed out. Try again.

Description: hostrocket Server Name: mailroom4.hostrocket.com Port: 465 User Name: ernie@e(redacted).com Authentication method: Normal password Connection Security: SSL/TLS

Anything change?

I keep getting "can't connect" message and I have to enter my password for outgoing mail. Incoming comes through no problem. How can I get Thunderbird to remember my provider password for outgoing? They obviously already have it for incoming.

A long-standing university email account that I accessed through Thunderbird was recently mistakenly deleted by the institutional administrator and all its contents deleted. The institution subsequently established a replacement email account for me, but the institutional Help Desk said the emails from the original account had been erased and could no longer be accessed from their server. Fortunately, I had Thunderbird configured to save all my emails on my local machine, so that even though I can no longer log in to the original email account, I can still view the emails in my Thunderbird installation (i.e., open and read them), even though every instance of starting up Thunderbird calls for me to supply the password for the original account (which I can no longer do). So I just close that dialogue box and can still see the emails stored locally on my machine.

I would like to move (or copy) these emails to a location where I can still access them off line and view them in the original organizational scheme (if possible), under the headings "subject," "correspondents," and "Date." But the Thunderbird "archive" feature seems to require that I be able to log on to the institutional server under the original account, which I can no longer do. The only existence of these emails is on my local computer.

Is there a way for me to preserve these emails as an accessible archive/repository so that I can continue having access to them, even though they are no longer in a functioning email account?

Thanks for any suggestions/help.

Followed the instructions in the article and cannot send email (SMTP error) "Login to server smtp.office365.com with username xxxxx#outlookcom failed"

Tried a new profile - no change Followed directions for using config editor and deleting two items - no change Could go back to original settings (turn off OATH2) but have to get it working by Sept so might as well slay the beast now.

Mark