Thunderbird Community Forum

Hello,

Is there someone who cam help me fix a 'constant mail delivery failure' issue ?

I've been experiencing for a while now that some emails I'm sending get returned with the 'mail delivery failure' notification.

Recently though I added a new email address to the Thunderbird dashboard, and when I am sending an email from this account I now get a 'mail delivery failure' notification with every email I sent.

I used to shut down my laptop, and restart it again, and usually that enables the email I've tried to send go through.

At this point, with that new email address, this trick doesn't even help anymore.

If there is someone knowledgeable about this topic, and willing to help me out, please do.

Kind regards,

Christiaano

I use Thunderbird 128.2.0esr (64-bit) to read mail from the Outlook server; these are the folder mappings:

imap://<email>@outlook.office365.com/INBOX imap://<email>@outlook.office365.com/Sent imap://<email>@outlook.office365.com/Drafts imap://<email>@outlook.office365.com/Trash

I used to also be able to read the Junk Email folder from the Ourlook server the same way, but the folder disappeared from my Thunderbird a couple of months ago. I tried re-adding it as a sub-folder, which is how I created it in the first place, but it won't appear on the list.

I'm not sure what else to do here. I don't know where the Thunderbird directories are stored locally any more, I'm using Ubintu 24.04.

I am really really distraught right now. It took me two weeks to get the time and focus to write a long reply to a company's nice email to me. Stayed up till 2am to write it. Deliberately wanted to re-read it in the morning before sending. Gone. Nowhere to be found. I pressed "Save to draft" before closing my laptop. But not saved. This account actually has a "draft" folder, unlike most of my other accounts in Thunderbird, which I also cannot figure out and no one has helped me with.

My email messaging seems to be set at a defined format with double spacing. I prefer to use single spacing but in order to do this I have to type all the way to the end of the page and then it will automatically go to the next paragraph and will then use single spacing. I would really like to be able to format my emails with single spacing and different margins other than what I have to use now (i.e.using the entire width of the message). I cannot find any way to change this automatic double spacing and change the width of the paragraph at the same time. From the drop down list directly above the body of the message, I have tried changing from Body Text to Paragraph and back again, but nothing works. Thanks very much for your help.

P. S. I am using Windows 10 with Thunderbird version 128.4.2 esr. I had the same problem in more recent versions but not in older versions.

Forum says you need a screenshot to help diagnose but Thunderbird doesn't allow screenshot of settings... So, Server Settings:

 Server Type:  IMAP Mail Server
 Server Name: imap-mail.outlook.com  Port: 993

Security Settings

 Connection security:  SSL/TLS
 Authentication method:  Normal Password

Running Thunderbird 115.10.1 (32 bit) Outgoing Server (SMTP) Settings Microsoft Live Hotmail - smtp-mail.outlook.com (Default) Windows 11 Home V 23H2

I've tried everything I can think of and read/tried lots of suggestions including turning off firewall, password changes, etc. I don't recall any updates or changes to anything when the problem started several days ago. Exasperated. Thanks for any help.

(PS - I do, on occasion, send a few $ to Mozilla. ;-) Thanks for your time.

There is ONE SPECIFIC email message in my inbox that I cannot move, copy or delete. Whether I drag-and-drop or use drop down menu - same result. This is the ONLY message in all my email accounts/inboxes which has this problem.

Continuing the attempt to move or copy causes the drop down menu to ask me if I want to move/copy the message AGAIN - but it still does not move or get copied. Hitting "Delete" on my keyboard or clicking the "garbage can" icon in the drop down menu has no effect - the email remains in my inbox.

I am using Tbird 140.1.0esr (64-bit)

I've read a number of posts regarding using Mail Store Home to enable the transfer of mail from a PST file to TB. I was under the impression that the archive within MSH could be run against a stand-alone PST file (that is, Outlook is not installed). When I select Archive Email as per instructions on other posts, and specify the location of the PST file and then run, I get an error: "This feature requires Microsoft Outlook XP/2003 or higher". Does it require Outlook to be installed, or am I doing something wrong? Also I am a bit unclear of the run sequence with MSH - do I run Archive Email followed by Export Email and what is the connection between the two? Refer to image attached. Thanks.

TB was working great until ten days to two weeks ago. Now it constantly crashes, crash reports fail to send, can't open emails, reply or forward, nothing works and then it crashes again. I have had complete virus scans, malware scans, threat scans done and none are detected.

What happened? I love TB but it no longer works.

Hello. I want to archive my older e-mails to a Local Folder that I created. I set up Archiving to archive to an "Archive" subfolder on Local Folders. But when I select e-mails and try to archive them by right-clicking and choosing "Archive," they don't appear in the folder I created. A subfolder is created with the year of the e-mails as its name, but there's nothing in it. If I look at its Properties, it shows 0 messages. I also tried selecting e-mails and copying them to the local folder, but that doesn't work either. I get the same result. I also tried repairing the folders and closing and re-opening TBird, but no help.

My Thunderbird version is 68.12.1 64 bit, running on Windows 7 x64. Any help would be appreciated. I can provide any info that might be needed.

TIA Les

Good morning,

I cannot delete drafts in my draft folder. I have sent the emails, but they are still in the drafts folder.

Does anyone have a solution to this problem? I now have 22 emails in my drafts folder. When I delete them, they immediately re-appear.

TIA, Leslie

Running 128.4.2esr (64-bit) on Mac Book Pro (14-inch, 2021 - Apple M1 Max).

I have been using Thunderbird across multiple accounts for years, and have collected a really decent amount of email history. Quick-Filters have always formed a large part of my workflow to find emails from given people. I do not take the time to filter messages into sub-folders etc, but rely on these tools to access the mails I need to get to.

In these recent versions, the Quick Filters have stopped working for me across all of my accounts.

When I attempt to use them, by entering a part of someone's email address, or part of a known subject, then click on the filter type I want to use, the indictor to show that the filter is active never changes. I use a dark theme, and expect the filter option to show it's actively applied with the light blue indicator on the filter's button. - This never happens.

In addition, while the displayed contents of the mailbox folder change, the filter itself is never appropriately applied to limit the content which is shown.

I had been sitting patiently on the sidelines hoping that this would be fixed in a new release, but I can't see much evidence of others suffering this same problem yet, and so I don't believe this is being addressed as a bug (yet).

I have enabled Troubleshooting mode to check with add-ons disabled etc, and that hasn't changed this behaviour for me.

This is quite an issue for me as it's affecting how easily I can use my local client. I've ended up having to return to webmail in order to find emails which I should be able to find in my client.

Anyone else having these problems? - Thanks.

Hi I am using the latest version of Thunderbird.

I have an extensive archive of historic emails organised by past year which have been exported to local folders on my PC. In the past a search for old email content, for example from a specific individual, has brought up a list of all the emails in the Thunderbird account both stored in the Thunderbird folder hierarchy and also in the offline files and short extracts of these have been shown. Clicking on one of these has always recovered the full email body content for that specific email from wherever it was stored.

More recently I am now finding that the body of the emails in the offline folders are no longer shown and the only way I have been able to view that email is to note the date and then physically scroll through the offline folder for that date.

Please advise.

I recently upgraded my OS from WIN 8.1 to WIN 10.0. Previously, I had installed Thunderbird in order to download my Gmail messages etc and import them to TB locally for archival purposes. When I upgraded to WIN 10.0, it was a clean install so TB and all the data was deleted. I have backups of the Gmail files I previously imported to TB but it seems the instructions are not clear on how to get them back into TB locally. I want to be able to search and read these emails when needed, since I deleted them from the Gmail server

I installed Thunderbird and typed in my Office 365 email information to connect my account. Thunderbird found the correct IMAP settings, which I verified on Microsoft's website. It proceeds to open a browser so I can authenticate my account. After that succeeds it starts downloading all of my messages & folders. I thought everything went fine until I attempted to send a message. I get the following error:

Login to server smtp.office365.com with username me@mydomain.com has failed.

It gives me the option to enter a new password, which doesn't make sense since it's oAuth2 but I created an app password to see if that would work, and it didn't. The only other options are cancel & retry which don't help either.

I thought maybe something went wrong with the authentication process so I uninstalled thunderbird and started again with the same results. I've tried many other server settings, but nothing works, so I'm here.

Current Settings:

Server Name: smtp.office365.com User Name: me@mydomain.com Authentication Method: oAuth2 Security: STARTTLS Port: 587

I've tried: Using Port 465 / SSL/TLS Using Port 465 / STARTLS Using Port 587 / SSL/TLS Changing Auth method to Normal Password and then using app-specific password. Uninstall / Resintsall

One final thing to note: I followed the same process with my fastmail.com account, which worked flawlessly. I can send & receive fine.

Bonjour, Je reçois le message suivant à l'envoi d'un mail, et cela pour toutes mes boites:

L’envoi du message a échoué. Une erreur est survenue lors de l’envoi de l’e-mail. Le serveur e-mail a répondu : 6C1HtsAZQgIcw Authentification requise. Authentication Required. OFR203_200 [200]. Veuillez vérifier que votre adresse e-mail dans les paramètres du compte est correcte et essayer à nouveau.

J'ai vérifié les adresses , elles sont correctes. Que faire? Merci Cordialement.

I have received an HTML-formatted message, which arrived with a red background colour. When I reply or forward that message, the message composition window appears with the same red background colour, and with black text. The resulting black text on a red background is hard to read.

How can I change the background colour of the reply or forwarded message which I am composing? How can I override the background colour set by the sender in the original message?

Note that I am asking about the background colour of a message which was set by the sender. I am not asking about how to set the default colour of messages I compose from scratch. Nor am I asking about how to set the background colour of Thunderbird windows or UI elements.

Thank you in advance.

Starting on 10/01/2024 Thunderbird no longer allows me to send or receive email.

When I try to read messages using Thunderbird, I get the following: Sending of password for user XX@msn.com did not succeed. Mail server outlook.office365.com responded: Logon failure: unknown user name or bad password.

When I try to send messages using Thunderbird, I get the following: Enter your password for XX on smtp.office365.com:

I have tried redoing the password and it does not help.

This is on a WIN/10 system. I updated to the latest version of Thunderbird and it did not help.

I checked out Thunderbird on my WIN/XP and get the same results as with WIN/10.

When I use Firefox and login to https://outlook.live.com/mail/0/, I can send and receive email as before. The same is also true with my Mobile Phone.