I-Thunderbird Community Forum

My problem is that JPEG attachments don't open, though PNGs do. I've got Original HTML actioned. Defaults are set to Fastone Image Viewer. Right click shows options but "open" doesn't work. Any ideas?

Somewhere in my version of Thunderbird, there is an old adress of one of my correspondant which is recorded This adress is no longer valid and I have deleted it from my adress book Nonetheless, when I start to write my correspondant's name, this adress keeps being proposed among the first options for the automatic completion of the adress How can I delete this wrong adress from the hidden part where Thunderbird has stored it?

mac calendar keeps wanting me to use a password for Safari, which I do not use, which then passes me on to Chrome. Plus calendar is not syncing with phone anymore. Help

I haven't updated Thunderbird since version 52.9.1 because of the interfaces which are painful for me and I don't see much. it still works well but does not support encrypted emails. I would like to install a recent version of TB but how can I make it look like the older, much more configurable versions? Please tell me if this is even possible.

This is translated from French

On January 1 my desktop version stopped downloading my GMAIL but my other non gmail are still downloading

I use Windows 10 and the version of Thunderbird is 147.0 64 bit

What can I do to fix this?

I quite often get this message, though it tends not to be a problem later "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox"

One of the solutions seems to be Compact a File. How do I do this?

Hi I was using TB 142 without problems. When upgrading to 143 ou 144.B4 I have problems sending mails to all users after some times. Usually the first mails are sent immediatly but after around 10 mails, I have very slow response (varies from 5 sec to more than 1 minute and sometimes timeout). Usually quitting TB solves the problem but this is very annoying. I went back to 140LTS and sems to have no longer this problem. This was tested on many diffrent networks. I am running under Fedora release 42

Thanks

Have no idea to whom I was chatting a week or so ago, but outlook.office365.com was recommended to me as the incoming server setting for Outlook.com. Set TB that way and used it for a week or so. TODAY got a "failure to authenticate" error from TB (have had many such errors before). Went directly to Copilot, as I thought it would be the most authoritarian place to clear up Microsoft problems. It provided the informaiton below: Official Outlook.com Thunderbird Incoming Server Settings (2026) IMAP (recommended) Settings Server name: imap-mail.outlook.com Port: 993 Security: SSL/TLS Authentication; OAuth2 Username; Your full Outlook.com email address

Why this is the correct server Outlook.com, Hotmail, Live, and MSN accounts do not use outlook.office365.com .

Set outlook account incoming server to imap-mail.outlook.com and reset TB Immediately got: Mozilla Thunderbird Thunderbird Authentication failure while connecting to server imap-mail.outlook.com.

Can someone please tell what's going on?

I have a Fedora laptop which has run Thunderbird on KDE Plasma for years.

I typically put the Thunderbird window on my big monitor where everything works as expected.

When I move the window to the laptop screen (or unplug the laptop and use it without the big screen), I can navigate the folder list in the left-hand pane, but the list of emails and body panes on the right do not display, only the Welcome screen.

When I put Thunderbird in Help > Troublehoot Mode, all works as expected.

The only special add on I use is the Get All Mail button.

I recently updated the computers at my shop. My shop uses an older program Mitchell 1 to process and organize invoices. I have used Thunderbird to email invoice pdfs for the longest time but now after updating I get “ERROR SENDING EMAIL. MAPI RETURNED -2147467259” it’s my understanding MAPI is outdated but I figured Thunderbird would still support this function.

Hi,

I’m experiencing an issue while trying to print emails to PDF in Thunderbird. Instead of opening the print preview or print dialog, Thunderbird sends the email straight to the default printer. Because of this, I don’t get the option to choose my PDF printer or adjust print settings.

This started after updating to a newer Thunderbird version, and earlier versions did not behave this way. The menu still shows Print…, which normally indicates a preview or settings window, so this feels like unexpected behavior.

Has anyone else faced this issue, or is there a setting or workaround to restore the print preview before printing? Any help would be appreciated.

Thanks!

Filters *unreliably* sort the mail into their target files. I have reconstructed the filters from scratch twice, both times with identical, unpredictable results: each filter works properly on the inbox when tested, but each filter only works *sometimes* in the normal course of getting (IMAP) and sorting mail. When getting a batch of mail, some messages are sorted, while others are not. When testing the same filters on the same (still unsorted but already picked up) messages, those same messages are recognized and sorted correctly. The question is: Why are the filters not working reliably during message pickup?

The mail server is running "Debian stable" Dovecot. It seems to work well; I'm not *missing* any messages, but they're not always getting into the right folders. Instead, some messages, and sometimes quite a few messages, may remain in the inbox. I surmise that the problem is in Thunderbird, where somehow the downloading process somehow undermines the sorting process. A queuing issue? A communications-with-Dovecot issue? (The server is in Paris and I'm in North America, but there doesn't seem to be any undue latency that I can detect. The server is not very busy, that's for sure.)

In case it helps: I filter mostly on `DKIM-Signature`, `Authentication-Results`, and `Received` header entries. In a couple of cases, I use `Body`. I'm almost always using "match any" (as opposed to "match all").

Hello! I want to set up TBird to: 1) Get all my messages and attachments stored locally, and... 2) Remove *most* of the above from gmail's server to avoid the data limit, but... 3) Keep, perhaps some months or a year of activity on gmail's server so I can access recent items from wherever.

Questions: 1) I have 10s of thousands (more?) of msgs, many with attachments. Is it better to just set up TBIrd and let it grab all the messages, or start by using Google TakeOut? 2) I presume I use IMAP vs. POP? 3) To preserve messages on my harddrive, I could archive to a local folder. Then I could safely delete those same messages on the gmail web interface? 4) If this turns into a disaster, can I just remove the entire account from TBird without suffering a loss of my entire email history? 5) Any insurance maneuvers to prevent the disaster of accidentally losing my entire email history while attempting to set this up? (Obviously will need to be religious about backing up my own system, though keeping a year of email on the gmail server offers a bit of insurance once the set up is successful.)

I am really hoping to avoid creating a unholy mess of my email/spending a week trying to fix it. (Indeed, I have avoided this project for years for this reason, but I really, really want to do this.)

Lately, when I try to click on a different mailbox or message , nothing happens. repeating clicks sometimes works, and sometimes i have to first click on what I was previous viewing to get what I want to highlight, or click on different areas of a message or mailbox to get it to work. I am on mac tahoe 26.2. Did not have this problem before. What can I do to fix this problem?

Thanks Dan

My Spectrum-TB connect was functional yesterday but is not working today; NO password or setting changes! Contacted Spectrum and was able to successful send an email from Spectrum's online webmail to a gmail account.

Hello,

since some years I use the facebook calender url in the calender tab.

Since some days the are no entries shown anymore.

The same calender url is correctly used in google calender (web & app)

The facebook url is as followed:

https://www.facebook.com/events/ical/upcoming/?uid=100001094911980&key=XXXVO6gUO0v9U63j

It would be helpful to have a solution or at least an explanation for this problem.

Best Regard Werner Heims

(from Germany with limited English knowledge)

Sorry - I feel as though I'm monopolising this forum at the moment!

In my Menu bar, I have Delete, but, using this, I can only delete emails from the Unified list, not individual accounts. I CAN delete from individual accounts if I select the email, right click and select delete. Seems odd

My Computer in Spain worked perfect wit my Emails until about 5 years ago when you upgraded thunderbird

Since Then it will not recognize my LOG IN passwords for both my Google email and my Plusnet email

I have had to access Gmail via there website but I like your set far better

I have had to access plus net via web mail which is very basic

Both Passwords work perfect in England

I have now set up another Computer and this time Thunderbird does recognize my Gmail password but still tells me my Plus net Password is not correct

I contacted Plus net last December from England and they confirmed that the Password is correct Have you any suggestions as to how I can solve this problem

I use windows 7 ON ALL MY COMPUTERS

Yours sincerely

Ron Goldthorpe

good day....ii hope someone can help. the other day i was accessing my yahoo account spam folder and by accident, i deleted the spam folder instead of emptying it. the spam folder is now sitting in the trash and i'm unable to remove it from there. when i log into my actual yahoo account, the spam folder is where it's supposed to be and not in the trash. i tried removing the yahoo account from thunderbird and reinstalling it in hopes that it would rectify the problem, but it hasn't. does anyone have a solution?? i would greatly appreciate any help you can offer. thank you for your time...mike s

Hi there! I and my colleague encounter some bugs with Thunderbird and we would like to seek your advice in regards of the issue.

1. <user a@citizen-systems.com.hk> was supposed to get a cc copy of the email sent by <user b@citizen-systems.com.hk> at Mon, 12 Jan 2026 09:35:19 +0800 but it never reached. The receivers, namely <user c@systems.citizen.co.jp> and <user d@citizen-systems.com.hk>, however, were able to get the mail. <user d@citizen-systems.com.hk> and <user a@citizen-systems.com.hk> are working at the same office and under the same network. Network provider checked the protocol, router, traffic and firewall are working as normal.

2. <user e@citizen-systems.com.hk> found a number of emails that she kept at "Inbox" disappeared on 12 Jan 2026 morning +0800.

She is unable to find it anywhere at her whole mailbox but has to ask the senders to resend them to her.

It would be very much appreciated if you can check and advise how to prevent the issue from happening again.

(PII redacted by moderator)