Thunderbird Community Forum

I keep getting message "The certificate for imap.gmail does not come from a trusted source". I've uninstalled thunderbird on occasion and it fixed this problem, but now it keeps coming back. bold text

Hi! I wonder how Thunderbird for Android works regarding security and privacy? If I use a Gmail account via Thunderbird, will I not miss the security features that Google provide, like warning for malicious/fraudulent emails? How can Thunderbird improve my privacy? I mean, Google will scan my emails when they are coming into or leaving the server anyways, I guess. And they will still let AI be trained on emails resting at the Gmail servers, so will there be any privacy benefits using Thunderbird? Please help me understand, because I have really liked Thunderbird for Windows and used it for many, many years when I had a Windows laptop as my main computer!

Thank you for your help and answer. I hope I can continue writing to you in German as well?

I can't find a contact person and the name of my Mozilla account has been changed; is that normal?

Thunderbird Portable Help

Question: A number appeared after my email address, so "email" and "1954". Who is that? Is that normal?

Question: Thunderbird Developer Toolbox: Can you see in the program? Can you see my emails?

Question: Are there any Thunderbird users left who speak German?

Questions: Thunderbird Portable The archive option isn't updating? How long does the backup take?

Different Thunderbird versions display a programmed year date in the archive option. For example, 2021 in one version and 2024 in another. Is that normal? I can't change anything.

It's as if it's accessing some kind of backup and maybe even sharing it, and I don't know what's correct.

Question: Update Channel Ellipse Update Channel esr. Previously, there were different channels. Isn't another channel better? I've read that it's more stable than switching. Is that true? Information regarding the question below?

140.9.0esr (64-bit) Thunderbird is up to date.

You are currently on the esr update channel. I'm experiencing stability issues with this one.

Thunderbird, Portable Edition portableapps - 1.0 Thunderbird is up to date. You are currently on the release update channel. New Download

General Information In Thunderbird Portable, there is a help page:

https://support.mozilla.org/de/products/thunderbird

Please reply and thank you very much for your help.

Hi, I just noticed that my computer has been infected by a trojan called "HEUR:Trojan.VBS.SAgent.gen", and I can't remove it via Kapersky...The trojan is found in the inbox file in Thunderbird. So it's not a file that I can remove (it's all code). Kapersky stated that these two files are the source of the Trojan (they are not found as an e-mail attachment in my inbox, it's all code in the inbox file in Thunderbird):

P000009384:Emirates_Marble-pdf.gz and P000009384:Emirates_Marble-pdf.vbs

So I'm simply wondering how I should go about to remove this trojan from my computer?

Source: https://threats.kaspersky.com/en/threat/HEUR:Trojan.VBS.SAgent.gen/

Even though I have created a main password I find that I suddenly I can open the application and view accounts and even security info, without putting it in anyway.

Dear all,

I would like to use Thunderbird on a shared computer at my universitys lab space (it is mainly my PC but other people have access and use it sometimes). However, as we are requested to keep mails confidential I thought it would be as easy as just setting a primary password and thunderbird would not start if that password is not set. However, that proofed to be a wrong assumption. Instead if I just cancel the dialog it will open and still display all the locally stored mails.

We are using IMAP server and I already set up that the mails are not stored locally. Still, some mails that I have used recently are visible. I am aware that there would anyway be the local copy in the profile folder but I guess none of the people sharing that computer would take the efford to check that, so I would be fine if I could simply prevent thunderbird from starting without the primary password.

Is there any option for that or any extention that would do so?

Thank you in advance! Juergen

Today is 01.16.2026 Hi Volunteers, thank you for the service you are providing Thunderbird users.

I didn't see a topic called Security, so I chose Settings.

For Thunderbird version 146, what specific version of LDAP is being used?

Regarding which LDAP version is the most up to date, I found this: https://pkg.go.dev/github.com/go-ldap/ldap/v3@v3.4.12

My concern is about LDAP's security. I believe it is reasonable to think that the latest available version of LDAP would have the latest and most up to date security patches applied.

I would like to feel secure knowing I have the protection of the newest version of LDAP which affords the best security protection available for Thunderbird laptop version 146.

However I have been unsuccessful in determining if Thunderbird 146 is using this LDAP latest version. Could you help me learn if Thunderbird 146 is utilizing the latest version of LDAP that is available? Thanks in advance.

Yes I know I am a bit verbose.

I am using Thunderbird with both Microsoft and Gmail accounts. My question is... is Microsoft able to see that i am using a Gmail account, and/or the account name/adress, and vise versa?

Hello,

I have saved message templates that I use. Each one also has a footer (which I save as an .html file).

When I use this template to send a message, the image in the footer doesn't load and I get the message: Thunderbird has blocked the file from loading in this message.

When I click UNBLOCK, nothing happens. The image still doesn't get added. It's a very small image from my footer/signature. 'When I compose a new message, I don't have this problem' – the image in the footer loads and is sent to the recipient. This problem occurs when I try to send a message saved in the templates. There's no way to "unblock the image" and send it.

02 Oct. 2025

Recently, some automatic updates were made to my Dell desktop. I assume they were updates to the Windows 11 OS.

The updates also caused some changes to my Thunderbird e-mails. The incoming e-mails are formatted differently. I used to get a message, saying that "remote content" in some incoming e-mails had been blocked. I was given the option to show remote content in the incoming e-mail. Now, I no longer have the option to "show remote content".

Please tell me how I can recover the option to "show remote content" on incoming e-mails.

Thank you.

Connie Yanicka

cyanicka46@gmail.com

Hi our Kaspersky detected objects but unfortunately our antivirus can't delete all the detected. I try to uninstall the thunderbird but still unable to delete the virus's message.

Hope get the assist for your team.

thank you

since updating computer I cannot access e mails on thunderbird I can only access them on talktalk mail and get a warning about someone else viewing e mails and telling me to leave page

I continually get popups wanting me to give permission for TBird to access all sorts of stuff. Is this a BUG or a "Feature"?. How do I turn them off? Or should I give permissions?