Thunderbird Community Forum

Hi: I need to import my data shown here: C:\Users\DonB\AppData\Roaming\Betterbird\t70e12zz.default\Mail\pop-mail.outlook.com so I see all my email and its folder structure.

I think Outlook.com became: outlook365.com?

Where do I change this stuff so it works?

My Profile archive: https://1drv.ms/u/c/f1c69e25e0d2390a/EYrCbhynjyhGptVQ-P5ZWGUBDJFeXZno-JwoGDWXauj_9Q?e=gK0kOL

Thanks, mozillafan

Trying to figure it out myself givr up. tracked to server settings not configured right? SMTP got this message a little while back,,,sending of the message failed. Unable to aiuthenticatrto outgoingserver(SMTP.COMCAST.NET. Please chech the passwordand verify. (don't know exactly how to do that) the authentication method in account settings/ out goingserver SMTP. 07/10/25 I have so many thingas messed up in there. I'm 79 and losing to this new technology

how much would it cost me for you wonderful people to fix it for me? can you do that?

Thanks for any information you can give me.

Linda Beck

PS I LOVE forefox and Thunderbird. It was always easy but nowl.....

No matter what I do, Thunderbird refuses to push my imap email. I keep missing several important emails. Outlook, Spark both work fine but I hate the ads. Please help me figure out what's wrong. This makes the client unusable.

Posting this request as my first has had no response.

I've downloaded Thunderbird, familiarized myself with it and have used the import/export tool to import my Outlook 2024 emails, contacts and folders into Thunderbird. Although the my contacts and one folder (with it's related sub-folders) were received, none of my other folders, including sent and deleted emails, arrived. I tried several times, but always get the same results. Looking at on-line advise, I've found conflicting comments about how this can, or can't be done. Also, there's an app available from Mozilla for this, but after downloading it, it doesn't execute and want's to be told which program to use to do so and nothing I select works. Can anyone tell me if it's actually possible to download all of my existing Outlook folders? If so, how is it done? Thank you in advance for your assistance.

I have an e-mail in my TB in-box. The mail contains a hyperlink to Facebook. When I click on the hyperlink, I get the message copied above in the Subject of this problem. In almost all cases, if I re-click on the icon in the e-mail, the re-click takes me to the desired URL in Firefox. My Thunderbird is 128.11.1esr (64-bit). Why is the first click producing the error message? Would there be anything in the TB Error Console?

I exported a group email list from Thunderbird, edited the list (primarily by adding new names) saved the result as a csv. When I imported the list, first off I was NOT able to import the list as a separate group within my personal address book which was really annoying. I found another thread at https://support.mozilla.org/en-US/questions/1498090 where someone was having the same problem. So it appears there is no easy way to create an new group in Thunderbird under my address book

More importantly, ALL the email addresses I imported were mangled for example k_boreen@hotmail.com became k+AF8-boreen+AEA-hotmail.com

Fortunately, it looks like I still have the old addresses in addition to the ones I imported but it's going to be a pain to get rid of the mangled addresses

I'm on version 128.12.0esr

Error de envío de mensaje Falló el envío del mensaje. El mensaje no se ha podido enviar porque ha caducado la conexión al servidor de salida (SMTP) smtp.dazzlepremiumrefunds.com. Vuelva a intentarlo.

Hello!

I just observed a new issue with S/MIME. When trying to send an encrypted mail to somebody new, I get an error “End-to-end encryption requires resolving certificate issues with somebody@example.com”.

The message is not very helpful, and doesn’t propose any solution. So a web search gave me this article: Prerequisite for sending an encrypted email message. It states:

> If Thunderbird considers the email's signature and the sender's certificate valid, it will automatically be imported and available when you attempt to encrypt an email to that correspondent using the S/MIME technology.

When I open the sender’s mail, the signature is confirmed as valid by Thunderbird.

Ignoring the warning message and trying to send the encrypted mail results in the following error in the log: `mailnews.send: NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIMsgComposeSecure.beginCryptoEncapsulation]`

So, I verified in my list of certificates for people, and that new person didn’t figure in the list. Other people did, the last one from 6 June.

Is it possible there’s a bug causing TB to not import the certificate when I open the mail? What would a workaround be? Is there a way to import a sender’s certificate manually from their signed mail?

Hello

Win 10 latest version, very old Dell Optiplex.

Background - Following a major corruption caused by a Win 10 update, I had to re-install a fresh copy of Win 10. I also had to re-install Thunderbird, and copied into the profiles a saved profile from a several months ago (later backups were lost in the same WIN 10 update catastrophe). Of course when I re-started Thunderbird, several hundreds of emails from the missing dates were downloaded from the email providers,

I have eight email accounts.

Now the left hand display box is weird.

My second most used account has empty, duplicated folders for Drafts and Sent, that I would like to delete.

Other accounts have a seemingly random list of sub-folders, some empty, some with one or two items in them.

The big problem is two email accounts' inboxes do not appear at all, and have probably been hidden away in the Local Folders Inbox.

Please help me sort out this muddle, so that there is a coherent list of all my email accounts.

When you search for messages, you will see a preview of the text and any attached attachments. When I open the message, neither the text nor the attachment is displayed.

You may need to convert PST files to other formats to access, share, back up, or migrate your Outlook data more flexibly and securely. PST files are only supported by Microsoft Outlook—so if you're switching to another email client (like Thunderbird or Apple Mail), moving to a cloud-based platform (like Gmail or Office 365), or simply want a portable, readable backup (like PDF), converting the PST file becomes essential.

When I want to send an email I don't get my receiver's saved email address on my mail start

I cannot sign in or send an email it continuously asks for my password

It does not save my sent emails THE whole thunderbird is gone crazy I havent done anything, I stopped paying now because you are not providing any services anylonger

I normally can see emails sent out from my account, when I am replying to an email that is in my Inbox. I have just recently installed Thunderbird for Android, and when I view emails in my inbox, I still cannot see emails in the thread, even though I just replied to one of the emails in my inbox. Now Thunderbird does realize that I have sent an email--I can view my email in the Sent folder. But I cannot see that email in the email thread in my inbox.

This is strange; with other email clients I can see emails that I reply to (meaning, I get an email from someone, see that email in my Inbox, and then reply to that email). I can see those emails that I sent out, in my Inbox in other clients, but not with Thunderbird for Android.

Apart from that, I really do like the Android client. Is there any option I need to configure to allow me to view my own emails sent out, in my inbox? I checked the Settings but didn't see anything to switch on/off.

Hi everyone,

I'm working on a privacy-friendly email setup and ran into a challenge with Thunderbird.

My setup: I have a catch-all email address that forwards all incoming emails sent to *@mydomain.com to my real mailbox, secret@mydomain.com. This way, I can use aliases like alias1@mydomain.com, alias2@mydomain.com, etc., without exposing my actual address.

This part works perfectly.

The problem: When replying to a message sent to alias1@mydomain.com, Thunderbird automatically uses secret@mydomain.com as the sender address. That defeats the purpose — the recipient now sees my secret address, which I wanted to keep hidden.

Thunderbird offers a workaround via identities, but it requires creating a separate identity for every single alias, which becomes unmanageable if you use a lot of them.

My attempted solution: My idea was to have my mail server insert a header like:

X-Alias: alias1@mydomain.com

Then, on sending, the server could rewrite the From: header using that value — thus preserving the alias and protecting my actual address.

However, I discovered that Thunderbird strips custom headers like X-Alias when sending. That breaks the solution.

My questions: 1. Is there any way to configure Thunderbird to preserve specific custom headers like X-Alias during sending? 2. Alternatively, is there a better or recommended approach to achieving what I’m trying to do — replying from the alias address automatically, without exposing the real one, and without creating hundreds of identities?

I’d really appreciate any ideas, insights, or suggestions. Thank you!