Thunderbird Support Forum

Outgoing email includes the user-agent header. I would like to disable or modify the string for better security.

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.0

Thanks...

Hello,

All of a sudden, this morning, my Thunderbird (102.12.0) will not sync my Office365 account's inbox via IMAP. I get the error message that

The current command did not succeed. The mail server for account [my university account] responded: User is authenticated but not connected.

A couple of seconds later, the above message is replaced by:

Server outlook.office365.com has disconnected. The server may have gone down or there may be a network problem.

The problem occurs on my laptop and on my desktop. I am sure all my settings are correct. I have read the entire thread here: https://answers.microsoft.com/en-us/outlook_com/forum/all/thunderbird-imap-responded-user-is-authenticated/062a82f6-e678-4462-88b7-dd6cc318386f

I have disabled IPV6 as instructed in the preferred answer: advanced config > network.dns.disableIPv6 = true.

I have also added network.dns.ipv4OnlyDomains = office365.com (I also tried outlook.office365.com).

I am using Kaspersky One antivirus. When I installed it, I had to add Outlook in the trusted addresses, as it wouldn't let me send email, but after I did, Thunderbird was again working as expected (this was two months ago). I am adding this detail just in case it is somehow relevant.

I am not sure when Thunderbird updated to 102.12.0 or if this is in any way related to the problem.

Meanwhile, I can sync incoming mail in my Gmail app on Android. I saw that the IMAP setting there uses port 443 instead of 993. When I tried setting 443 in Thunderbird, it simply took too long to connect to the server and timed out.

I don't know what else to try. Hopefully, you can think of a solution.

After update to 102, TB is asking for a PW when starting in normal mode. -> PW-vault is empty When starting in safe-mode everything is working well. (PW-vault is not empty)

I tried to make a new profile. Then it worked, but only until next update (102.0.1).

This happend also after update to 102.0.2 and 102.0.3. :(

Now I tried to copy a not working profile folder from mounted NAS-drive to local drive. -> Profile on mounted device is working only in safe-mode -> Profile on local device is working well in normal mode

For me it looks like, TB is not able to read (decrypt?) stored PW from mounted devices in normal mode. (But it works well in safe-mode).

- Win10 - no addons

I have been getting this message since January and am starting to be concerned

Secure connection failed start.thunderbird.net uses an invalid security certificate. The certificate is not trusted because the issuer certificate has expired. Error code: <a id="errorCode" title="SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE">SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE</a>

  This could be a problem with the server's configuration, or it could be someone trying to impersonate the server.
  If you have connected to this server successfully in the past, the error may be temporary, and you can try again later.

Or you can add an exception… When I click on add an exception nothing happens. I tried closing Thunderbird, deleting my cert8.db file and restarting Thunderbird - no change - same message. I am running Windows 10, Thunderbird version 45.8.0

Help, please ! Thanks, Sarah

I CAN'T LOCATE MY PASSWORD TO LOG IN. NO MATTER WHAT I DO IT ASKS FOR MY PASSWORD. I COMPLETELY UNINSTALLED THUNDERBIRD EMAIL AND DOWNLOADED IT AGAIN. FIRST THING ASK IS ENTER YOU PASSWORD....WHAT GIVES THANKS RON

I can view my existing password but when I edit it to change it the new password is typed in and change saved but can no longer access email. Program is closed then reopened, computer is shut down then restarted but to no avail. HELP!!! Please. Thank you. Kevin

ThunderBird stopped being able to pick up email from our pop3 server.

The Error console shows:

mailnews.pop3.1: SecurityError: a SecurityCertificate error occurred Pop3Client.jsm:336:18

_onError resource:///modules/Pop3Client.jsm:336

This doesn't give me a hint as to the problem is with the security certificate. It hasn't changed recently and worked yesterday.

The cert is self-signed and expires in a few days. Previously (not recently) I had to do a variety of things to make Thunderbird happy with it.

Starting May 12th Godaddy e-mail accounts no longer support pop/imap email servers. They want you to switch over to an exchange server type. Can I configure Thunderbird to accomodate this change (I've been with Thunderbird for many years), or do I need to change to Outlook 365? Help, Thunderbird no longer downloads my e-mail from Outlook.

Hi,

I have a fire2wire.com account. I use Thunderbird for all of my email correspondence. About six months ago, I started having to put my password in every time I open Thunderbird, and again when I try to send out an email. Can you tell me how to remove the password requirement?

Don djordan@fire2wire.com

A browser window pops up and there's a Microsoft logo: We can't sign you in Your browser is currently set to block cookies. You need to allow cookies to use this service.

https://login.live.com/ is the URL in the mini-browser window.

This all worked in the prior version, something changed in 115.3.1 (64-bit)

Firefox is the default browser. I tried it with Edge as the default browser, same problem. It didn't used to pop up a window to login.

I changed my email password. When I retrieved mail a dialog asked me for the new password - no problem. However, when I attempted to send mail - it just said failed. Well, of course. The stored password is wrong. I can find no way to change the stored password for SMTP. This is a serious problem for me. What do I do?

Thunderbird v 102.7.0 - Windows 10 v21H2

I needed to change my email password on one account - I changed it at the server, then changed it in password manager. I could not log into the imap server - I checked the all the server information in account settings and password manager. All was correct. After trying to get things to work for a few hours, I deleted the line with the servers/password/etc. info.

I then tried to enter a password for that account and cannot find a location where I can add the password. I've look in Account Settings, Server Settings. In Account Settings, there is an edit option for the SMTP server, I've worked through that and nowhere to enter a password.

In addition, I can't find a location to enter a password for the imap server (password is the same as for SMTP)

Please advise Thanks for your assistance.

Ron Rueter rdr@k7pa.com

Thunderbird REPEATEDLY Keeps Marking Non Junk As Junk giving me a daily headache in manually marking them as NON junk. I very rarely receive junk email, and those I do receive stick out like a sore thumb. I'm capable of deciding myself what is and is not junk. How to TOTALLY disable junk filtering? I mean TOTALLY, not the "usual" fixes given which don't work. There must be something in the config editor I can adjust, surely. Thank You Regards George

I get a message: "This POP3 server does not seem to support encrypted passwords ..." My provider use only TLS 1. In the pas I have to set security.tls.version.min to 1. This trick doesn't work with 102.

I also try to set security.tls.version.enable-deprecated to true : no good result.

With security.tls.version.fallback-limit set to 1 : no good result.

Any idea?