Forum communautaire Thunderbird

I have been having all my email transferred from Yahoo mail for more than a decade, it used to be Frontier net, and i didnt want to change my email, and i havent, so i transfered it on 3 devices because i am very used to the thunderbird format. It still works on my android phone and my HP laptop, but thunderbird will not allow me to sign in to yahoo mail on my PC which is what we use the most for our email, for some reason yahoo made some changes and required a new sign in so i did that on the other 2 devices, however, when the sign in box from yahoo pops up on our PC it always says " OOPS something went wrong" and i called yahoo and they verified it was not them. Which leaves Thunderbird to fix the problem. Please address this as i still Do Not want to change my email address or the Thunderbird Mail which we are used to. Some things are okay just as they are, so i would like some help from your end. Thank you, Richard Sessums.

Thunderbird is difficult to maintain consistent operation.

Periodically, the font color changes without warning, and your settings options is very limited and or 'WELL' hidden.

Making it virtually impossible to find out how to change various screen graphical settings, such as 'font color' or 'font size', etc.

This is not the first time my font color has changed, and I can't find out how to reset the font color in the Calendar editor for any particular calendar event, either creating and or editing a change to the calendar event.

So please, provide me with an instruction on how to change the font color in ANY calendar event, via your Calendar editor.

My Calendar editor in the comments block is set currently with a black background and 'black' font color. So I cannot read a darn thing in the comments block. FYI, when currently using the mail editor, I have a white background with black text, working OK. But NOT the calendar editor.

After all these years, you would of thought Mozilla, either Firefox or Tbird, would have provided a good help dialogue on screen to inform users on how to do things like this. You either have done so and kept it a trade secret, and or have NOT improved upon your terrible user guide instructions.

Thanks in advance.

Good day,

I have a site that I use for my Tia Chi Walking classes and lately I'm not receiving any communications from them. I've reported the issue to their support team and they responded with this error they've received when they try to send an email to me from the site: https://esmerise.com

smtp; 421 4.4.1 Unable to connect to remote host | 421 | TransientCommunicationFailure

The email address that I use is from my ISP Spectrum.net, however I use Thunderbird to sync all my emails. I contacted Spectrum support and they are not seeing this error, all emails appear to be coming through with them.

Please advise if anyone has experienced this issue and if so, how was it resolved.

Thank you Billie

Running Windows 11 Home and Tbird 153.4.0esr. Tbird configured with IMAP. I have many years worth of emails stored in my Tbird profile folder. Profile folder is 25 GB.

I want to delete the bodies of all emails in the profile folder but retain the subject lines to minimize the size of the profile folder (while keeping bodies of all emails on the server). Then I can retrieve any email from the server.

Anyone do this successfully without losing emails? Is there a step-by-step procedure for doing this on the Mozilla website? (Google is giving me an Ai answer but not a link to a Mozilla answer.)

I changed POP3 email password to an app password and Thunderbird would not recognize it even though I updated in Security. I was told to delete the Thunderbird account then set it back up which I did--I did not check the box to delete files. Finally the new account was able to bring in new emails (POP3) but the old folders/emails are not there.

I read that I should go to %appdata%, roaming, Thunderbird but the dates are from years ago--do I go further to find my data or is there another path or something else I should do?

Unless they were backed up somewhere within Thunderbird, I don't think I have any backup.

Can you please help? Thank you.

I have Thunderbird configured to log in to 3 separate email accounts, one of which is a Yahoo email account. Several days ago, a message appeared that notified me that Thunderbird would not connect to the imap account in Yahoo. I tried changing the password by logging in to the Yahoo account via my browser, but Thunderbird still gives the error message. Do I need to delete the Yahoo account from Thunderbird and start over, or is there something else that can fix Thunderbird so I can use it for all 3 email accounts? Thank you.

Hello there

I have had Thunderbird for a number of years on the same Windows 10 laptop. Current version 153.4.0esr (64-bit) updated today/yesterday trying to resolve the issue. I am able to retrieve messages from two accounts one earlier than the other but not to send any message. None of the others either hotmail, live or gmail. I was able to check individually the email inbox directly and all seems correct. I checked the profiles and found only one. Also old Mail folder for pop no longer in use. ImapMail seems to be correct. As I am writing another account has received messages but unable to send any.

This seems really weird! No error messages, or warning , just does not want to behave normally

Bonjour. Plusieurs onglets correspondant aux messages ouverts dans thunderbird se sont fermés brusquement. Je voudrais savoir comment les réouvrir. Merci de votre aide.

Hello there

I have had Thunderbird for a number of years on the same Windows 10 laptop. Current version 153.4.0esr (64-bit) updated today/yesterday trying to resolve the issue. I am able to retrieve messages from two accounts one earlier than the other but not to send any message. None of the others either hotmail, live or gmail. I was able to check individually the email inbox directly and all seems correct. I checked the profiles and found only one. Also old Mail folder for pop no longer in use. ImapMail seems to be correct. As I am writing another account has received messages but unable to send any.

This seems really weird! No error messages, or warning , just does not want to behave normally

Thunderbird flatpak -1.0 I recently lost the ability to attach files of any kind to messages. when I click the button to attach, no option to choose messages from files are available. I cannot go to the file and share with Thunderbird. I cannot copy a file and attach it. I have tried restarting Thunderbird, and my system (Po_OS Linux) with no result. thanks for the assistance!

Since the Thunderbird update of 30 Sept the ability to attached files to my emails has 'vanished'. I press the attach 'button' but there is no response. Never had this as a problem before. I am running Windows 11 home version. Help!

I have a POP3 account which will not download new emails. The indication is there are no new emails. I can access the email account through gmail and there are many new emails. I have checked password. I have gone through the re-indexing procedure and all other possible solutions I could find. I did find some information about Java and incidentally, there was a Java update on the day my emails began to fail, 8-16-2026. I found this error message, but I don't know how or if I can fix this: module is not a constructor ExtensionCommon.sys.mjs:1679:15

   asyncGetAPI resource://gre/modules/ExtensionCommon.sys.mjs:1679
   AsyncFunctionNext self-hosted:780

Thank you for any help you might provide. Please email to [redacted email from community support forum]

Good afternoon

I have been struggling to find some messages specific to specific dates and spend an awful amount of time tryomh yo access the correct one.

The solution proposed is a bit unclear to me, as it refers to "future folders". I need to unthread all my messages. Is this possible?

Thanks

PS The only version number i could find was for Firefox. There does not seem to be one for Thunderbird.

Добрый день! В отправленных сообщениях пропали сообщения за последние два дня по адресу ak@ava.proekt.ru, как их восстановить?

Hello, So my thunderbird updated yesterday 10/1/2026 and since then it's changed my layout and also making problems in attaching documents etc. Is there a way to revert to the last version? Or does someone have a way to fix this problem?