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Hi Team,

Greetings!

I need your assistance regarding password protection for the Thunderbird email client.

I have configured an IMAP account in Thunderbird and enabled the **Primary Password** feature. However, if I cancel or skip the password prompt during startup, Thunderbird still opens successfully, and all previously synchronized email messages in the Inbox remain accessible. The user is also able to view the mailbox and access email content.

My requirement is that "Thunderbird should not open, display any email messages or allow Send/Receive operations unless the correct password is entered".

Could you please advise if this functionality is supported natively or suggest the recommended approach to achieve this?

Looking forward to your guidance.

Regards, Ps Cheema

I have 'Allow remote content in messages' turned off.

When viewing a message with remote content, I see the bar "To protect your privacy, Thunderbird has blocked remote content in this message", however the 'Preferences' dropdown described in Remote Content in Messages does not exist...

I want to show remote content for a single message, but this seems impossible!

What am I doing wrong?

very recently perhaps with a McAfee or Thunderbird update , I am seeing a message that McAfee stops a threat every time thunderbird does a message retrieval. see attachments. I have checked my outlook account directly and deleted a bunch of messages but it persists.

Is it possible to somehow incorporate a virus/trojan checker into the software that is open source for Windows? I keep getting TONS of alerts from Mcafee that it caught viruses. Also wondering if this could be a addition to Thunderbird in a new release by incorporating something like CLAMAV into thunderbird software somehow?

This appeared on my passwords setting page on FF

After a little googling I thought the page was probably safe but in fact it's ServerNotFound

What's going on? Has FF itself been hacked?

I always get: "newmsg Trojan:WIN/SuspiciousAttachmentScript.a" and "C:\Users\newb\AppData\Local\Temp Trojan:WIN/SuspiciousAttachmentScript.a" from Mcafee when I open Thunderbird. I'm only getting this in Thunderbird and suspect it's a false positive of some kind. It's still worrying and I'd like to eliminate this. This has been going on for a couple of months. I've run several cleaners and anti-virus programs on the system, but it still returns.

thanks

I just set up a gmail account in T-bird. I can send, but I can't receive. It keeps saying there's no email to get. I use a read-only email app called Mailwasher. I AM getting Gmail email in that app, while it's on the server.

I have gone through the settings in T-bird several times. I even checked on the web. - I entered what you see below (in both Thunderbird and Mailwasher): '"Incoming Mail Server Settings (IMAP) Hostname: imap.gmail.com Port: 993 Requires SSL: Yes Username: Your full Gmail address (e.g., example@gmail.com) Password: Your Gmail password"

I even tried changing the password a couple of times (also had to do this in Mailwasher).

UPDATE: now Thunderbird isn't logging on and wants a new password (which I've done twice already). No reason why.

PLEASE ADVISE. Kami

i can still see my email folders but these popups appear for each email account in thunderbird (mac osx high sierra) never saw them before so seems something has been compromised? tried to screencap but it's only showing about: url but urls zip by and was able to catch the url a few times earlier but not now.

my accounts are valid this is a new problem just appearing for first time ever

"thunderbird is up to date" for mac os x high sierra

Today (February 25, 2026) I received an email notice, apparently from Mozilla Monitor, advising me that my "Email addresses, Partial credit card data, Passwords, and Phone numbers" had been exposed in a data breach at Canadian Tire. This email seemed legitimate (the sender was breach-alerts@mozilla.com), but since it gave me a link to login to Mozilla Monitor, my first concern was that this might be a phishing email and it would be dangerous to click on that link. Instead, I went through the Firefox settings to login to my Firefox account and from there, I checked what Monitor had reported. The Canadian Tire breach was not listed there. However, when I went to haveibeenpwned.com, the Canadian Tire breach was listed there. It showed that the breach occurred on October 25, 2025. So why was the breach not listed for me on Mozilla Monitor? And why would I have received an alert from Monitor 4 months after the breach? Was this breach alert notice actually a phishing scam perpetrated by someone using the information from haveibeenpwned.com as bait?

When I use thunderbird to download messages from my sky email, I get a threat notice and " The file containing the threat was at c:\users\appdata\local\temp\newmsg" - I use mcafee. I do not get this threat notice when getting messages from my bt emails or my zen emails via thunderbird. I do not get this threat message when logging in directly to sky emails on the internet. I have deleted my sky email account in thunderbird and reinstalled the account but I still get the threat notice. Can you help .

My default email address ([redacted-1]@btinternet.com) has been hacked and access to my contact list gained. Many contacts receiving emails purporting to be from me.. I have changed my default address to another one ([redacted-2]@gmail.com). What do you suggest I do or should I report it to another organisation? Thanks, Peter Russell

Hello! No real issues or bugs to report, but I had some curiosities about independent audit documents. I appreciate the dedication to privacy and transparency, as I am sure many do; I've noticed that there are readily available audit documents for the Thunderbird Send and K-9 which is cool - are there any such audit documents for Thunderbird Desktop for Linux, or do the aforementioned documents sort of cover the same thing? If you could help me understand this (or perhaps point me to information or docs I missed), that would be appreciated!

Thanks for your time, --Mark