Yonke imikhiqizo Community Forum

For the past few days when I open Thunderbird I get a message "https://caldav.one.com is requesting your username and password." (see attachment). I've never signed up for Caldav so I don't have a username or password. If I hit "Cancel" it proceeds as normal. If I enter my email address and log-in password it also proceeds as normal. In either case I have to go through the same process every time I open Thunderbird.

When clicking any hot link in an email, whether FB or a web retailer email, etc. this message pops up: "This file does not have an app associated with it for performing this action. Please install an app, or if one is already installed, create and association in the Default App Settings page."

At a loss for a solution here. Can someone please help. Thanks.

Hi,

I’m using Thunderbird on Windows and recently ran into a certificate warning that I can’t safely interpret, even after searching the web and using AI tools (which gave me inconsistent answers).

Thunderbird tries to connect to the iCloud contacts server p123-contacts.icloud.com (CardDAV). When it does, I get a “wrong site” certificate error. When I click “View certificate”, Thunderbird shows a valid certificate, but not for Apple/iCloud – it’s for login.kraftcom.de (issued by DigiCert / GeoTrust TLS RSA CA G1). I did not accept the exception.

From what I can see online, p123-contacts.icloud.com is a legitimate Apple domain, but it is also mentioned in some phishing / scareware contexts, which makes me even more unsure how to interpret this combination (Apple host + Kraftcom certificate). I’m also not sure whether this is simply a captive-portal / ISP login interception effect or something that should worry the wider community.

My questions:

Is this behavior expected in any scenario, or does it indicate a misconfiguration / MITM situation that Thunderbird should treat as a serious security issue?

Is there anything I should check or change on my side (Thunderbird config, network, ISP, certificates)?

Is there any additional diagnostic information I can provide (logs, screenshots) that would help you assess whether this is a Thunderbird issue or a network/ISP issue?

I specifically did not confirm the certificate exception and I would like to keep my setup secure, but I also want to make sure the community is aware if this is a broader problem.

Thanks in advance for any guidance

Not sure how to explain this but...

I was using Bluehost, and they somehow screwed up my website (my email was attached to my domain). I switched domains today and when I restarted Thunderbird, all my previous emails disappeared. I'm not sure why they didn't stay on the "server" and I don't know how to get them back now that I've swtiched from Bluehost.

I still have access to my emails on my phone (thru gmail, not thunderbird, but it's NOT a gmail / Google Workspace email).

Is there a way for me to retrieve these messages? I'm on a mac, btw.

I HAVE HAD AN EMAIL FOR EVER. MY LAPTOP CRASHED AND I CAN NOT GET THUNDERBIRD TO EXCEPT MY PASSWORD MY MOST IMPORTANT E-MAIL [edited from public forum] @GMAIL.COM I HAVE TRYED EVERYTING, TRYED TO CONTACT GOOGLE. I THINK THEY STOL MY E-MAIL. MY PASSWOR JUST WILL NOT BE EXCEPTER?? PLEASE HELP!

When I use Mail Merge to generate emails for many recipients, they are put in the "Outbox", but Thunderbird will only send 10 emails at a time. After 10 emails, I have to close the program and start it again to get the next 10 sent. So to send 100 emails, the program has to be closed and started 10 times!

I just opened my Thunderbird e-mail account, did thunderbid only access emails from my sbcglobal account email account or did TB download the the 100,000+ SBCglobal emails to a thunderbird file that I can continure to access?. I believe that AT&T is going to delete my sbcglobal email account as I have canceled my AT&T internet service. I see sbcglobal messages in thunderbird that go back to 2008 that I would like to read again. Will these messages disapper when AT&T disables the SBCglobal email account.

Hello,

I've used Thunderbird for my e-mail for approximately 15 years, and now I can't currently send e-mail. I've gone through all the troubleshooting steps and also had Geek Squad attempt to fix it, but I'm still unable to send e-mail (I can receive them).

I've changed my password multiple times, reinstalled a fresh copy of Thunderbird on my Windows 11 laptop, restored the default settings for the outgoing server to align with what Verizon has specified, and nothing resolves the problem.

I keep getting the message: " Sending of the message failed. An error occurred while sending mail. The mail server responded: Email rejected. Please verify that your email address is correct in your account settings and try again."

Please let me know what the next step is so that I can use Thunderbird to send and receive my e-mails, like I have in the past.

‘Service provider advised me to go to Cookies & Site Data select Manage Browser button in the search websites bar type themessagingco.com.au then Select this entry from the list and Remove & save’ for ‘Thunderbird’