Thunderbird Community Forum

Using Thunderbird 128.5.0esr (64-bit) on 128.5.0esr (64-bit). In calendar view, I see all my appointments with the background colour of the calendar they are in (see attached). In my inbox view, I have the Events tab open at the right. All day events have the background colour of the appropriate calendar, but ones with timings have a dot. (see attached). How do I make ALL calendar events have the background colour of the associated calendar in the mail events tab??

I am using MacOS 10.13, Thunderbird 115.15.16ESR: my Hotmail worked until 15 May 2025 and then it would not download new emails. Screenshots are available if you want me to post them. I got an error message: "authentication failure while connecting to server outlook.office365.com". I updated Thunderbird to the latest for my OS: 115.18.0ESR. Still no new emails. I deleted my email account on Thunderbird and tried to reinstate it. Now I get an error message when trying to set up the account: "Unable to log in at server. Probably wrong configuration, username or password." I tested my password by logging into my Microsoft account with it on my browser. I can also login to my email using Firefox, but I want my Thunderbird email client to work again.

The configuration I am using is: I use my normal hotmail password in the password field. I also set up a new App Password with Microsoft and tried that without success. With the 115.18 update there is a new field: Your login. I just put my hotmail email address in here. incoming: outlook.office365.com, port 993, SSL/TLS, Oauth2 
outgoing: smtp.office365.com, port 587, STARTTLS, Oauth2 (I have also tried: smtp-mail.outlook.com)

I enabled 2-step authentication with Microsoft in my Microsoft account more than a year ago. Interestingly, I don't get a prompt on my iPhone Microsoft Authentication App when I select Done when trying to set up the hotmail account on Thunderbird.

Please help. I am desperate, and I have wasted a lot of time on this without success. Cheers

I thought this problem was resolved last month. Today, all my historic emails have disappeared but are visible in safe/troubleshoot mode.

I have done the following:

1) Disabled all extensions. 2)Themes are set to default. 3) force updates through Help - "About" .

It seems that all new emails are being shown in TB but all historic ones have diappeared except for in safe mode.

Please could someon help. Thank you so much

Suddenly messages have disappeared from all folders; all I see is No messages found.

I tried Repair Folder. It appeared to work, it ran for several minutes on my Inbox, but that didn't help.

I discovered that if I run in Troubleshoot mode that all messages appear, but when I close Thunderbird and relaunch, which opens without Troubleshoot mode, that all messages have again disappeared.

I'm running 128.11.0esr with windows 10.

Thunderbird is not synchronizing with Mailfence. My other email accounts (Outlook, Gmail) work fine. TB connects to them, downloads message headers and displays the number of messages correctly. With Mailfence, the messages stop at "connected to imap.mailfence.com" and stalls there. The message disappears after a few seconds and nothing else happens. This happened this morning when I first launched TB. I then got an update to 128.11.1. No change. I did receive the Windows Update 2025-06 Cumulative Update sometime overnight prior to launching TB.

This REALLY shouldn't be this hard. Created a TB profile backup (see subject) from my LAPTOP. Copied it to c:\users\username\appdata\roaming\thunderbird\profiles on DESKTOP. Trying to open TB, I get error: Your Thunderbird profile cannot be loaded. It may be missing or inaccessible

Must be something I'm doing wrong. Been on the interweb for 2 hours trying to get this accomplished. Tried everything I could find. Unsuccessful. Can someone help?

As an aside, c:\users\username\appdata\roaming\thunderbird entry is MISSING from my laptop. Can't find the profile directory. TB opens fine on the laptop, so profiles directory is available to TB, but NOT to me. Where would the profile directory be stored on the LAPTOP?

I am trying to import a backup of my gmail using using ImportExportTools.

What does this error message mean? Is there a corrupt email in my gmail? If so how can I find and delete it so I can complete the import, I think it was close to finishing.

2nd question.... After clicking OK on the error message I can select the local folder it was importing and I can see it is then downloading a range of messages with mention of their labels in the bottom of the window but the labels are not creating folders. Should I expect it to do that?

[Exception... "Component returned failure code: 0x80550005 [nsIMsgFolder.msgDatabase]" nsresult: "0x80550005 (<unknown>)" location: "JS frame :: resource://mboximport/content/mboximport/modules/mboxImportExport.mjs?14.1.7 :: rebuildSummary :: line 706" data: no]

rebuildSummary@resource://mboximport/content/mboximport/modules/mboxImportExport.mjs?14.1.7:706:5 _importMboxFile@resource://mboximport/content/mboximport/modules/mboxImportExport.mjs?14.1.7:415:16

Hiya. I had a message that I accidentally deleted by force-of-habit. I found it in Bin and selected Move To/Favourites/Inbox. It's now disappeared and doesn't show in the search. It's not present on my Gmail account either. Is there any way to get this back?

When I delete an email message, they do not go to Trash, they just disappear. I have used TB for several years but this started happening just recently. I can right click on a message and Send To to Trash, or drag and drop, and both those and work. I have went through all the settings I can find, and don't see any obvious problems. I did find a "fix" from 2023 that involved deleting the Smart Mailboxes folder and restarting TB but that that didn't help.

Sorry if this is in the wrong place. Did not seem to be an obvious one for my question.

I go tired of the Outlook web client always trying to us AI to assist me. Installed Thunderbird ver 128.6.1 esr on a Ubuntu 24.04 system running Cinnamon desktop. All components are up-to-date (or should be as auto-update is on). System details at end of message.

Screens for mail and tasks are rock solid. The calendar jitters up and down rapidly small amounts. Not the entire page. Just the part where the calendar is displayed. Makes things a tad blurry and is tiring to look at.

Any ideas on how to resolve?

TIA

System:

 Kernel: 6.8.0-52-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
 Desktop: Cinnamon v: 6.0.4 tk: GTK v: 3.24.41 wm: Muffin v: 6.0.1 vt: 2 dm: GDM3 v: 46.2
   Distro: Cinnamon 24.04.1 LTS (Noble Numbat) base: Ubuntu

Machine:

 Type: Desktop Mobo: Micro-Star model: B550M PRO-VDH WIFI (MS-7C95) v: 1.0
   serial: <superuser required> uuid: <superuser required> UEFI: American Megatrends LLC. v: 2.L0
   date: 07/18/2024

CPU:

 Info: 8-core model: AMD Ryzen 7 5800X bits: 64 type: MT MCP smt: enabled arch: Zen 3+ rev: 2
   cache: L1: 512 KiB L2: 4 MiB L3: 32 MiB
 Speed (MHz): avg: 2589 high: 3681 min/max: 2200/4850 boost: enabled cores: 1: 2200 2: 2880
   3: 3072 4: 2200 5: 2880 6: 2200 7: 3681 8: 2200 9: 3191 10: 2880 11: 3046 12: 2200 13: 2200
   14: 2200 15: 2200 16: 2200 bogomips: 121608
 Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm

Graphics:

 Device-1: NVIDIA GA106 [GeForce RTX 3060] vendor: eVga.com. driver: nvidia v: 550.120
   arch: Ampere pcie: speed: 2.5 GT/s lanes: 16 ports: active: none off: HDMI-A-1
   empty: DP-1,DP-2,DP-3 bus-ID: 2b:00.0 chip-ID: 10de:2503 class-ID: 0300
 Display: x11 server: X.Org v: 21.1.11 with: Xwayland v: 23.2.6 driver: X: loaded: nouveau
   unloaded: fbdev,modesetting,vesa failed: nvidia gpu: nvidia,nvidia-nvswitch display-ID: :1
   screens: 1
 Screen-1: 0 s-res: 2560x1440 s-dpi: 94 s-size: 692x393mm (27.24x15.47") s-diag: 796mm (31.33")
 Monitor-1: HDMI-0 res: 2560x1440 hz: 60 dpi: 93 size: 697x392mm (27.44x15.43")
   diag: 800mm (31.48") modes: N/A
 API: EGL v: 1.5 hw: drv: nvidia platforms: device: 0 drv: nvidia device: 2 drv: swrast
   surfaceless: drv: nvidia x11: drv: nvidia inactive: gbm,wayland,device-1
 API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: nvidia mesa v: 550.120 glx-v: 1.4 direct-render: yes
   renderer: NVIDIA GeForce RTX 3060/PCIe/SSE2

Audio:

 Device-1: Creative Labs CA0132 Sound Core3D [Sound Blaster Recon3D / Z-Series BlasterX AE-5 Plus]
   driver: snd_hda_intel v: kernel pcie: speed: 2.5 GT/s lanes: 1 bus-ID: 04:00.0 chip-ID: 1102:0012
   class-ID: 0403
 Device-2: NVIDIA GA106 High Definition Audio vendor: eVga.com. driver: snd_hda_intel v: kernel
   pcie: speed: 16 GT/s lanes: 16 bus-ID: 2b:00.1 chip-ID: 10de:228e class-ID: 0403
 Device-3: AMD Starship/Matisse HD Audio vendor: Micro-Star MSI driver: snd_hda_intel v: kernel
   pcie: speed: 16 GT/s lanes: 16 bus-ID: 2d:00.4 chip-ID: 1022:1487 class-ID: 0403
 API: ALSA v: k6.8.0-52-generic status: kernel-api
 Server-1: PipeWire v: 1.0.5 status: active with: 1: pipewire-pulse status: active
   2: wireplumber status: active 3: pipewire-alsa type: plugin

Network:

 Device-1: MEDIATEK MT7922 802.11ax PCI Express Wireless Network Adapter driver: mt7921e v: kernel
   pcie: speed: 5 GT/s lanes: 1 bus-ID: 29:00.0 chip-ID: 14c3:0616 class-ID: 0280
 IF: wlo1 state: up mac: <filter>
 Device-2: Realtek RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet vendor: Micro-Star MSI
   RTL8111/8168/8411 driver: r8169 v: kernel pcie: speed: 2.5 GT/s lanes: 1 port: f000
   bus-ID: 2a:00.0 chip-ID: 10ec:8168 class-ID: 0200
 IF: enp42s0 state: down mac: <filter>
 IF-ID-1: surfshark_ipv6 state: unknown speed: N/A duplex: N/A mac: <filter>
 IF-ID-2: surfshark_wg state: unknown speed: N/A duplex: N/A mac: N/A

Bluetooth:

 Device-1: MediaTek Wireless_Device driver: btusb v: 0.8 type: USB rev: 2.1 speed: 480 Mb/s
   lanes: 1 bus-ID: 1-9:7 chip-ID: 0e8d:0616 class-ID: e001 serial: <filter>
 Report: hciconfig ID: hci0 rfk-id: 0 state: down bt-service: enabled,running rfk-block:
   hardware: no software: yes address: <filter>

Drives:

 Local Storage: total: 931.51 GiB used: 171.93 GiB (18.5%)
 ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 980 PRO with Heatsink 1TB size: 931.51 GiB
   speed: 63.2 Gb/s lanes: 4 tech: SSD serial: <filter> fw-rev: 5B2QGXA7 temp: 34.9 C scheme: GPT

Partition:

 ID-1: / size: 914.78 GiB used: 171.92 GiB (18.8%) fs: ext4 dev: /dev/nvme0n1p2
 ID-2: /boot/efi size: 1.05 GiB used: 6.1 MiB (0.6%) fs: vfat dev: /dev/nvme0n1p1

Swap:

 ID-1: swap-1 type: file size: 8 GiB used: 0 KiB (0.0%) priority: -2 file: /swap.img

USB:

 Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 10 rev: 2.0 speed: 480 Mb/s lanes: 1
   chip-ID: 1d6b:0002 class-ID: 0900
 Device-1: 1-3:2 info: HP HP USB Mass Storage Device type: mass storage driver: usb-storage
   interfaces: 1 rev: 2.0 speed: 480 Mb/s lanes: 1 power: 500mA chip-ID: 03f0:5907 class-ID: 0806
   serial: <filter>
 Device-2: 1-6:3 info: Logitech Logi Bolt Receiver type: keyboard,mouse,HID
   driver: hid-generic,hid-multitouch,usbhid interfaces: 4 rev: 2.0 speed: 12 Mb/s lanes: 1
   power: 98mA chip-ID: 046d:c548 class-ID: 0300
 Hub-2: 1-7:4 info: Genesys Logic Hub ports: 4 rev: 2.0 speed: 480 Mb/s lanes: 1 power: 100mA
   chip-ID: 05e3:0608 class-ID: 0900
 Device-1: 1-7.1:6 info: Thermaltake 3.9 inch Bar Type TFT LCD Display Module-B type: HID
   driver: hid-generic,usbhid interfaces: 2 rev: 1.1 speed: 480 Mb/s lanes: 1 power: 100mA
   chip-ID: 264a:233d class-ID: 0300 serial: <filter>
 Device-2: 1-8:5 info: Micro Star MYSTIC LIGHT type: HID driver: hid-generic,usbhid
   interfaces: 1 rev: 1.1 speed: 12 Mb/s lanes: 1 power: 500mA chip-ID: 1462:7c95 class-ID: 0300
   serial: <filter>
 Device-3: 1-9:7 info: MediaTek Wireless_Device type: bluetooth driver: btusb interfaces: 3
   rev: 2.1 speed: 480 Mb/s lanes: 1 power: 100mA chip-ID: 0e8d:0616 class-ID: e001 serial: <filter>
 Hub-3: 2-0:1 info: super-speed hub ports: 4 rev: 3.1 speed: 10 Gb/s lanes: 1 chip-ID: 1d6b:0003
   class-ID: 0900
 Hub-4: 3-0:1 info: hi-speed hub with single TT ports: 4 rev: 2.0 speed: 480 Mb/s lanes: 1
   chip-ID: 1d6b:0002 class-ID: 0900
 Hub-5: 4-0:1 info: super-speed hub ports: 4 rev: 3.1 speed: 10 Gb/s lanes: 1 chip-ID: 1d6b:0003
   class-ID: 0900

Sensors:

 System Temperatures: cpu: 36.5 C mobo: 32.0 C gpu: nvidia temp: 34 C
 Fan Speeds (rpm): N/A gpu: nvidia fan: 0%

Repos:

 Packages: 2601 pm: dpkg pkgs: 2561 pm: flatpak pkgs: 19 pm: snap pkgs: 21
 No active apt repos in: /etc/apt/sources.list
 Active apt repos in: /etc/apt/sources.list.d/brave-browser-release.list
   1: deb [signed-by=/usr/share/keyrings/brave-browser-archive-keyring.gpg] https: //brave-browser-apt-release.s3.brave.com/ stable main
 Active apt repos in: /etc/apt/sources.list.d/onedrive.list
   1: deb [arch=amd64 signed-by=/usr/share/keyrings/obs-onedrive.gpg] https: //download.opensuse.org/repositories/home:/npreining:/debian-ubuntu-onedrive/xUbuntu_24.04/ ./
 Active apt repos in: /etc/apt/sources.list.d/surfshark.list
   1: deb https: //ocean.surfshark.com/debian stretch main
 Active apt repos in: /etc/apt/sources.list.d/ubuntu-esm-apps.sources
   1: deb https: //esm.ubuntu.com/apps/ubuntu noble-apps-security noble-apps-updates main
 Active apt repos in: /etc/apt/sources.list.d/ubuntu-esm-infra.sources
   1: deb https: //esm.ubuntu.com/infra/ubuntu noble-infra-security noble-infra-updates main
 Active apt repos in: /etc/apt/sources.list.d/ubuntu.sources
   1: deb http: //archive.ubuntu.com/ubuntu/ noble noble-updates noble-backports main restricted universe multiverse
   2: deb http: //security.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse

Info:

 Memory: total: 32 GiB available: 31.26 GiB used: 3.65 GiB (11.7%)
 Processes: 398 Power: uptime: 1h 0m states: freeze,mem,disk suspend: deep wakeups: 0
   hibernate: platform Init: systemd v: 255 target: graphical (5) default: graphical
 Compilers: gcc: 13.3.0 Client: Cinnamon v: 6.0.4 inxi: 3.3.34

I just pressed Enter and the whole topic disappeared. Why? Why do you do this? This is my whole subject: Why do you do your things automatically, when I try to do manually? You have a great EMAiL-software: Thunderbird. Why do you want to screw it and the user? Computer usage should be reliable. I have lost so many EMAiLs since you broke the EMAiL paths logic with threads. Why? Why did you want to make it complicated? I had a good filing system with Thurnerbird for years. Why did you have to break it? Why didn't you even make it optional, but mandatory?

How can I get the old EMAiL-filing back without the Thread-Paths? Please help!

I didn't ask this immediately, but during the years, I have lost so many important EMAiLs (again today), that now I ask.

After working fine for years, Thunderbird stopped receiving email from my POP accounts a month ago and I haven't been able to get it to work since. After weeks of experimentation and frustration, the only way I can get TB to download POP mail is to install and run it in Windows Safe Mode with networking. However, once installed in Windows Safe Mode, TB run in Windows normal mode will successfully send messages from each account.

It would take pages to describe everything I've tried, so I won't. The results of all the tweaking and updates is the system specs below.

OS: Windows 10 Home (x64) version 22H2 AVS: BitDefender Email: Thunderbird 102.15.1 Add-ons: None Theme: Default Accept cookies: Always Exceptions: (added any that seemed even remotely associated with issue) https://accounts.google.com https://mail.google.com https://www.googleapis.com https://pop.gmail.com https://pop.gmail.com:995 https://smtp.gmail.com https://smtp.gmail.com:587 https://pop.centurylink.com https://pop.centurylink.com:995 https://smtp.centurylink.com https://smtp.centurylink.com:587

Saved passwords: mailbox://pop.centurylink.net (mailbox://pop.centurylink.net) Oauth://accounts.google.com (https://mail.google.com https://www.googleapis.com/auth/carddav https://www.googleapis.com/auth/calendar) smtp://smtp.centurylink.com (smtp://smtp.centurylink.com) smtp://smtp.gmail.com (smtp://smtp.gmail.com)

Hardware acceleration: Off

Gmail POP server: pop.gmail.com Port: 995 Security: SSL/TLS Authentication: Oauth2

Gmail SMTP server: smtp.gmail.com Port: 587 Security: STARTTLS Authentication: Oauth2

CenturyLink POP server: pop.centurylink.net Port: 995 Security: SSL/TLS Authentication: Normal password

CenturyLink SMTP server: smtp.centurylink.com Port: 587 Security: STARTTLS Authentication: Normal password

I'm at a total loss as to what I've missed or where to look next. I would appreciate any help.

Why doesn't Thunderbird block spam and junk mail? It often tells me that "Thunderbird believes this message is Junk," and I right click "Mark" and tell Thunderbird the message is "Junk," but the sender is never blocked. How many times must I tell Thunderbird that a sender is spamming me?

Why is it so difficult to block a sender who is spamming me? With other email clients, just one marking of "Spam" is enough to block that sender?

How do I tell Thunderbird to block a spammer?

I hope someone answers me in Dutch. I cannot open my mail, because I cannot close the "welkom bij Thunderbird" page, that showed when i opened my mailprogramm. I donated, did not work, still not closing, i started my computer again , did not help. I see new mail is incoming but opening is not possible. I hope that i don't have to install it again.Thank you

I'm looking for solution to make or prevent Thunderbird automatically filling up the "From" box.

In other words; I want the "From" section to be empty every single time for me to fill up. Just like I have to do with the "Subject" and "to" boxes.

I'm willing to hack Thunderbird if there's no an user friendly solution for this I want! Just please tell me what to do and I'll do!

Thank you in advance, Attila.

Thunderbird 128.5.2esr (32-bit) Odd problem in that just one folder was being identified as not being able to be compacted because of Disk Space....not true, plenty of space as I keep it regularly cleaned. I can clear the issue by making another folder of a different name, copying all messages to that folder then running COMPACT on the new folder and nothing is amiss. Run it on the original problem folder and no issues. Delete the original folder and create another with the same old name and transfer the messages to the now new originally named folder. Delete the TEMP folder. Then run a COMPACT on the problem folder and no issues.

Then run compact on the whole message tree and sure enough the COMPACT issue has now moved to a different folder. I suspect you could chase this thing till the cows come home but won't resolve, just moves it from folder to folder.

Now I could just kill Thunderbird and reinstall but this is intriging. Not sure if that would help. Ran TROUBLESHOOT MODE clean with out the only extension I use and no change. Stumped.

Thanks!