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Mozilla suddenly says "The certificate for mobile.charter.net does not come from a trusted source." It will not let me get my emails. Is this a problem with Thunderbird or Charter (Spectrum) I am able to receive email on my I Phone. I do not know which Thunderbird version and can't find it using your instructions. Help please

I'm used to check certs with right click on icon beside the address. Also for own servers in my local LAN I need this. I know there is Let's Encrypt. But sometimes it's more easy to just have a self signed cert and verify it myself. Also I want to see, who signed a cert from www.snakeoil.com/insert_your_credetials.

Please help.

rundekugel

When i try to update my schooles secure mail, i get the nev certifikat and the Root, and Ca1 under autoreties and give it the right rights but it keeps giving me this error message " Certificate verification failed with the following error: The peer's certificate issuer is unknown. (Error code: SEC_ERROR_UNKNOWN_ISSUER)"

Receive popup message: The certificate for mobile.charter.net does not come from a trusted source. In trying to send email, popup message: Sending the email failed. Peer's Certificate issuer is not recognized. The configuration related to mobile.charter.net must be corrected. Then it wants me to Add Security, Get Certificate.

Email not working on my desktop. Using Edge 11, Settings show certificate for mobile.charter.net:993 does not come from a trusted source. I can not send or receive email on my desktop. This started this morning. I have not made any changes to my computer, but did do an Edge update. I can check my email on my cellphone if there is a fix.

I am using Thunderbird 151.0.1 (64-bit), and I get the "trusted source" message in a pop-up every time Thunderbird checks for email. There is only an option to Dismiss presented. My account name changes color to red and has a red triangle with an exclamation mark displayed. I went to Settings > Privacy & Security > Security > Certificates > Manage Certificates and looked at all the certificates listed in the Certificate Manager > Authorities (which is the only section with anything listed) and don't see anything from mobile.charter.net. I can go to SPECTRUM.NET (Charter) and view my email with no problems. I'm at a loss as to be able to view my email in Thunderbird.

We have used mobile.charter,net for our emails since we signed up for your product. Now my husband gets the mobile.charter.net "certificate is not from a trusted source" error when Modzilla is retrieving emails. I have the same email provider, and do not get the error message from Modzilla. Can you help us correct this problem?

I am unable to download email for my Bell email accounts. For one of the two Bell accounts all messages disappeared. I get an error message saying saying the server's certificate is invalid.

I recently obtained a digital certificate for use with S/MIME. I followed the process laid out in

https://support.mozilla.org/en-US/kb/instructions-smime-certificate-using-csr

to generate my key pair, create a CSR, submit it to a CA, download the resulting certificate file, and import it into Thunderbird. I also imported the intermediate certificate showed as the issuer for my cert, which in turn appears to be signed by one of the certs trusted by default in Thunderbird.

Having done that, I see the certificate showing up under "your certificates" in the Certificate Manager, with a "not before" date in the past and a "not after" date in the future. So everything appears to look correct, but when I try to send a signed email I get the following error message as a pop-up:

"Sending of the message failed. You specified that this message should be digitally signed, but the application either failed to find the signing certificate specified in your Mail & Newsgroup Account Settings, or the certificate has expired."

And if I look at the console in developer tools I see:

"mailnews.send: NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIMsgComposeSecure.beginCryptoEncapsulation]

   _startCryptoEncapsulation resource:///modules/MimeMessage.sys.mjs:488
   _writePart resource:///modules/MimeMessage.sys.mjs:536
   createMessageFile resource:///modules/MimeMessage.sys.mjs:82
   createAndSendMessage resource:///modules/MessageSend.sys.mjs:147
   CompleteGenericSendMessage chrome://messenger/content/messengercompose/MsgComposeCommands.js:6456
   GenericSendMessage chrome://messenger/content/messengercompose/MsgComposeCommands.js:6372
   SendMessage chrome://messenger/content/messengercompose/MsgComposeCommands.js:6984
   doCommand chrome://messenger/content/messengercompose/MsgComposeCommands.js:1085
   doCommand chrome://messenger/content/messengercompose/MsgComposeCommands.js:1263
   goDoCommand chrome://messenger/content/globalOverlay.js:99
   oncommand chrome://messenger/content/messengercompose/messengercompose.xhtml:1
   openWindowPrompt resource:///actors/PromptParent.sys.mjs:75
   receiveMessage resource:///actors/PromptParent.sys.mjs:18
   openPrompt resource://gre/modules/Prompter.sys.mjs:1228
   openPromptSync resource://gre/modules/Prompter.sys.mjs:1071
   alert resource://gre/modules/Prompter.sys.mjs:1375
   alert resource://gre/modules/Prompter.sys.mjs:78
   fail resource:///modules/MessageSend.sys.mjs:358
   createAndSendMessage resource:///modules/MessageSend.sys.mjs:157

MessageSend.sys.mjs:149:32

   createAndSendMessage resource:///modules/MessageSend.sys.mjs:149
   CompleteGenericSendMessage chrome://messenger/content/messengercompose/MsgComposeCommands.js:6456
   GenericSendMessage chrome://messenger/content/messengercompose/MsgComposeCommands.js:6372
   SendMessage chrome://messenger/content/messengercompose/MsgComposeCommands.js:6984
   doCommand chrome://messenger/content/messengercompose/MsgComposeCommands.js:1085
   doCommand chrome://messenger/content/messengercompose/MsgComposeCommands.js:1263
   goDoCommand chrome://messenger/content/globalOverlay.js:99
   oncommand chrome://messenger/content/messengercompose/messengercompose.xhtml:1
   openWindowPrompt resource:///actors/PromptParent.sys.mjs:75
   receiveMessage resource:///actors/PromptParent.sys.mjs:18
   openPrompt resource://gre/modules/Prompter.sys.mjs:1228
   openPromptSync resource://gre/modules/Prompter.sys.mjs:1071
   alert resource://gre/modules/Prompter.sys.mjs:1375
   alert resource://gre/modules/Prompter.sys.mjs:78
   fail resource:///modules/MessageSend.sys.mjs:358
   createAndSendMessage resource:///modules/MessageSend.sys.mjs:157"

I can't make sense of the error message, since the certificate appears under "your certificates" in the certificate manager, and it does not appear to be expired. Can anyone suggest how to determine the root cause and fix it? Does it matter that the certificate is for a non-default identify I've added for the account in Thunderbird? Does it matter if the "common name" in the certificate doesn't match the "Your Name" field in Thunderbird? Any pointers on what to check would be appreciated.

Receiving emails was no problem, but when sending one I was repeatedly asked for my password. I did check the save password in the dialog box. I checked the account settings and saw a yellow alert next to certificate exception and clicked on remove. That apparently was a mistake because now I can't get into email since the security certificate is not valid. Reinstalling Thunderbird may be needed, but I need some advice before I try anything else.

I've been trying to set up a GPG key, but Thunderbird doesn't recognize my pub.asc file. So I created a PGP key thru Thunderbird and I would like to export it as ASCII-armored public key.

Hello,

I have been testing all browsers I use (Firefox, Chrome, Edge) on Cloudflare Post-Quantum Key Agreement to verify PQC support. They all support the X25519MLKEM768 hybrid scheme (i.e. Cloudflare web page returns "You are using X25519MLKEM768 which is post-quantum secure").

The issue: When I run the test in Firefox multiple times by doing repeated hard refreshes (Ctrl+Shift+R), quite often the result is "You are using X25519 which is not post-quantum secure". Sometimes the very first run after opening Firefox gives the X25519 (failing) result. "Often" varies. Sometimes it's around 10 fails out of 50 tests, other times it's 1 out of 50. It seems random.

I have read that sometimes networking equipment or even ISPs can be the cause of PQC requests falling back to non-PQC due to the long keys in PQC, but I do not see this intermittent issue with Chrome or Edge on the same computer/network/ISP as Firefox. I have not seen a single failure so far on those two browsers. The only variable I am aware of is the web browser.

I also tried connecting to a cellular hotspot as well as disabling my Norton 360 firewall and the results are the same as above.

Looking for help to resolve this issue. Thanks.

Hi Folks, I use, as do others I know, Thunderbird for Android. Recently it has decided that the SSL Certificate it accepts for fetching emails is not valid for sending and requires you to accept and make an exception for the certificate. Has anyone else found this? I have tested the certificate, provided by Lets Encrypt, on several servers all claiming SMTP, POP3 an IMAP offer valid certificates. Yet Thunderbird still claims it is a security threat. Can omeone off an answer please? I am currently helping others accept the certificate.

Thunderbird ofr Android is V18.0

regards Anthony

For the past few days almost every site I try to visit gets the error:

Secure Connection Failed An error occurred during a connection to.... SSL received a record that exceeded the maximum permissible length. Error code: SSL_ERROR_RX_RECORD_TOO_LONG

this has happened on and off in the past for one or two sites but usually fixes itself within a day or less but this time it's been days. I tried everything I've seen online: -Try without add ons, - I am using 'system settings' proxy, -Followed an 8-yr-old suggestion of switching security.tls.version.max from 4 to 3 -My AV doesn't have HTTPS scanning that I can disable -It doesn't allow me to toggle the 'enhanced tracking is on' in the address bar -I've tried adding a site as an exception to DNS over HTTPS and turning Enable DNS over HTTPS off

Nothing has helped. These are all sites I've used in the past. I am using Nightly v150 at the moment but obviously same situation with FF or R3dfox.

If anyone can suggest how to bypass this so I don't have to use Edge/Chrome/Supermium (which all display these sites without issue) I'd appreciate it so much!

(*I'm looking for help with THIS issue on a W7 laptop, not about whether I should upgrade the OS.)

Thanks.

OS: GNU/Linux Thunderbird Desktop

Is it possible to set up a TLS client certificate for authentication with SMTP, as it is with IMAP?

It works fine on the K-9 Android client for both IMAP and SMTP.

Is there a reason why this hasn't yet been added as an authentication method for SMTP?

Thank you!

Best Regards

Every time I log in and then every so often afterwards I get the pop up - you are about to override how Thunderbird identifies this site- for a now deleted mail.co.uk account. I have tried all the fixes suggested by Google but it still keeps happening and is driving me mad. It tells me the certificate is outdated or invalid and asks to confirm to permanently store the exception but just keeps coming back every time I click on confirm, it only goes away if I click cancel but then keeps coming abck.