Thunderbird Support Forum

Have used Thunderbird for 10+ years, as interface to Gmail. Lovely product. 3 days ago I had to reinstall a station but when Thunderbird does its updating after reconnecting to gmail address for the 10GB of emails, it behaves damn irregular: - periodic freezes of mouse and keyboard, for about 0.3 seconds every 3 to 5 seconds. - Thunderbird message says downloading email number out of total number of emails (very slowly advancing) but every 3 seconds it starts downloading email 1 of those emails - station has cumulated some 20 hours working, most of these left to finish syncronizing. Usually in 2 - 3 hours there is time enough.

This happens only when Thunderbird runs, when I close it the station runs fine. Same hardware on the station as before..

Did you encounter this? Thanks.

I am using Thunderbird to connect to a personal POP & SMTP server. I have recently migrated to a new desktop and moved the old profile folder to the new computer (so I would keep all the emails). Everything was transferred successfully, including the profile settings.

When I open Thunderbird, I am asked for my password and it all goes well if I enter it manually. If I check the "Use Password Manager to remember this password" box, I am met with a "User to server X with username and password failed" - error and a "Sending of password for user did not succeed" - error. I am entering the exact same password in both cases, yet it only fails when I try to save it.

Hi,

Thunderbird suddenly stopped working today,, can not receive emails or send emails. I can log directly into web client and emails are sitting there have confirmed settings with my hosting company and everything is working their end they have also confirmed the settings are correct in Thunderbird

Hi,

I have been configured my Gmail account in Mozilla thunderbird client version 115.12.0 in Windows 11 system. Have been receiving an error message frequently as below "Unable to write email to the mailbox. Make sure the file system allows you write Privileges, and you have enough disk space to copy the mailbox."

System has enough space and memory and please advise.

I did search for solution before posting this. Couldn't find any recent fixes. Using Version 115.10.1 I have used Thunderbird for years to get various emails. Including 2 different att.net emails. Until about 2 days ago, this has been working well. All of a sudden I keep getting the popup to login with my password. I looked at the password file to see what was being used. Hasn't been updated for years. I used web browser to login to att.net account, confirmed that the pw listed in Thunderbird was correct. I looked at my att account and found that I setup a secure key in 5/21. Not sure what has changed that I can no longer use thunderbird for att emails. Note: I deleted the account from thunderbird and attempted to re-establish the connection.. I used the automated process that TB had for the settings. got an error using the regular password AND using the secure key. I tried setup manually, making sure that the inbound/outbound settings matched. Still won't let me login. Something has had to have changed.

This page did not help. https://www.att.com/support/article/email-support/KM1086159 System config and results screen prints are attached.

Cancelled setup and started over This time I entered the secure id as the password,

I am no longer able to send/receive messages in Thunderbird. Sending of password failed and login failed. I tried changing my password, but that did not help. This happened on 6/16/24 in the evening.

I invited someone to an appointment, but screwed up the repetition parameters. I then cancelled that appointment.

The person I invited accepted the original (screwed up) appointment but did not process any emails to cancel the meetings. How can they edit / delete appointments that they did not themselves set up? You can see how messed up the calendar is with the erroneous entries...

A while ago my long-time hotmail account stopped working on two computer with windows 10 and one with windows 11. Last night, I looked up an article that said I have to use Oauth2 instead of normal pw. I made that change on the windows 11 machine and a popup occurred that wanted the number from the google authenticator on my phone. I gave it that and it checks mail now just fine.

This morning I went to one of the Windows 10 machines and did exactly the same. I tried some different server names online and tried some, but after a while I started getting a little window that asked my email address and pw. I put my hotmail address in and got this message:

Microsoft Accounts or personal email addresses don’t work here. Make sure you enter your work or school account (e.g. user@contoso.com). If you want to reset a Microsoft Account password, click here.

Now this is the very same hotmail email that worked on windows 11 with the same server settings last night. It still works.

Now, on the windows 10 machine with those same settings, I get the blank extra window. The extra window appears, does not populate, and disappeared.

It is: https://login.microsoftonline.com/common/oauth2/v2.0/authorize?response_type=code&client_id=9e5f94bc-e8a4-4e73-b8be-63364c29d753&redirect_uri=https%3A%2F%2Flocalhost&scope=https%3A%2F%2Foutlook.office365.com%2FIMAP.AccessAsUser.All+https%3A%2F%2Foutlook.office365.com%2FPOP.AccessAsUser.All+https%3A%2F%2Foutlook.office365.com%2FSMTP.Send+offline_access&login_hint=redacted@hotmail.com

I had no opportunity to do what worked on the windows 11 machine just last night. I cannot check mail on hotmail on this windows 10 pc. I took all the updates available to Thunderbird and firefox. TB is 115.11.1

I'm stopped. Why would it work on one pc and not another? Oauth2 on the windows 11 asked for authenticator. On the windows 10 it never asks.

The newest incoming email is hidden behind the tool bar at the top of the main mail window. I have to scroll UP to see it. My apologies in advance. I am not tech-savvy. Thank you, A Really Old Fa*t

cannot log in to 'Host'. at bottom of page it reads : "email adress: Host contacted, sending login information..." thunderbird connects through a bt account and i think some difference has arisen preventing one connecting with the other. there has also been a notice saying the 'bt account settings are out of date' which may be preventing Thunderbird loging in. since the notice gives no further information i have no idea what means or what to do about it. have tried uninstalling and reinstaling Thunderbird but that made no difference. hope you can help, i have no idea what to do and am emailess - which is a terrible thing to be!! thank you steve

Last night I used my Computer and checked for New Emails, before Powering Down. This morning I Powered Up and went to see if an Email I am waiting for has arrived - but Thunderbird is treating me like a Brand New User and asking me to Create Passwords etc. When I finally get to something that looks a TINY BIT like my normal screen, ALL of my Messages and Folders have DISAPPEARED. The last time I used THUNDERBIRD (about 9 hours ago) I just looked for New Messages, and didn't try to make Any Changes, Updates, Archives, Migrations or Imports. Why is Thunderbird treating me like a Brand New User and asking me to Set Up an Account ? How do I retrieve my Emails (both Sent and Received).

Hello.

I read that thunderbird works with Microsoft 365 and modern authentication. I tested with Microsoft 365 accounts and it worked fine. The problems come with an accounting of Microsoft 365 operated by 21vianet service.

I configured according to https://support.mozilla.org/en-US/kb/microsoft-oauth-authentication-and-thunderbird-202 with the IMAP and SMTP settings from https://support.microsoft.com/en-us/office/settings-for-pop-and-imap-access-for-microsoft-365-operated-by-21vianet-ca51235d-afc5-4d7d-843c-3616a37d5771

It complaints "The IMAP server partner.outlook.cn does not support the selected authentication method. Please change the 'Authentication method' in the 'Account Settings | Server settings.'"

In SMTP settings there is no option to configure OAuth2

All of the sudden my subfolders under Sent disappeared and even the Sent folder disappeared. Plus TB keeps asking me for my password which is a long series of letters, ie. security key. Please help. There was very important info in those folders and I'm feeling kind of desparate. I uninstalled TB and reinstalled. Not fixed at all. Thank you.

While managing my Thunderbird Inbox, I inadvertantly transferred a chunk of Inbox messages received from my MS Office365 Outlook account into the trash. I went into Outlook on the WebApp and discovered that all of the inadvertantly deleted emails were found under recover deleted emails. So within Outlook I recovered all mails into the Inbox. So far, so good.

Now I have all the mails listed in the Inbox on Outlook. But when I open Thunderbird again, the recovered mails do not show up. It seems that Thunderbird does not fully synchronize the folder and the recovered emails are not downloaded. Instead, all mails are once again removed from the Outlook Inbox. The previously recovered mails disappear again from the inbox of OWA and I have to recover them all again.

I have already tried several fixes. Within Outlook, I created a new folder and moved the recovered Inbox mails to that folder. This was done in the hope that this folder will then sync properly with Thunderbird. Unfortunately no. The folder does not sync and as soon as Thunderbird is closed again, all mails are deleted again from the new folder on OWA.

I also deleted the Outlook account (including all stored data) and recreated the account in Thunderbird. Unfortunately, the same thing happens again. The recovered mails are not displayed in Thunderbird and after closing the program, the mails are deleted again in OWA and I have to recover them again. Finally I went so far as to uninstall Thunderbird completely from my computer and reinstalled the software. That did not fix the problem either.

I will also provide another observation: in the past when I have recovered individual emails the same behavior has occurred. Seems that when Outlook or Exchange places a deleted email into the recovery queue, there is a change in its identify such that TB now views it as a deleted message.

Any suggestions on how this can be fixed?

Best regards

Upgraded to the newest version of Thunderbird, 115.11.1 (64-bit) and now I can not get into my emails on bellsouth.net. . Error message "Sending of password for user xyz123@bellsouth.net did not succeed. Mail server inbound.att.net responded: [SYS/TEMP] Server error - Please try again later." I keep trying but same error for two days now. I can get my email on the web (Yahoo mail) ok. I double checked the setting and everything is good and migrated to the new version ok.

I see a preview of new emails that fades after a minute or so. I just saw such a preview, it faded, but when I opened Thunderbird, there is no new email in inbox.

How can I find it?

Also, is there a way to change frequency of retrieving new emails? To create an account for this, I had to get a 6 digit code...it took 4 minutes to appear.