Thunderbird Community Forum

I have made 3 attempts to add a thunderbird account to receive email from an old verizon.net account server. All have failed.

All three times, I got the message.

     "Unable to login at server. Probably wrong configuration"

which is a remarkably ambiguous error message. It takes about 10 minutes for that message to appear.

I am able to log directly/independently into what I understand is the verizon server. But obviously I am doing something wrong.

Independently, I successfully added a thunderbird account for an outlook.com.

I will skip the verizon account for the time being. I have one other account to move the Thunderbird.

I successfully moved all three to Mac mail a few weeks ago, only to discover that I really don't like it for a variety of reasons, the most significant for me was that

     - I learned about IMAP
     -  I couldn't delete messages, although IMAP on a mac creates the 

illusion that I could.

There is nothing quite like seeing messages that I know have deleted, reappear marked as unread, right before my eyes.

Thoughts anyone?

-m

The new version that was just installed immediately times out when I attempt to send an e-mail. I suspect there is an issue with my server as previously the first email I would try to send after a restart would fail with a request to check a security exception. Once I indicated to ignore the security issue, subsequent e-mails went immediately.

My inbox was inadvertently moved down in the list of folders and I am not able to drag and drop it back to the top. It looks like there used to be a "Manually sort folders" extension but it no longer works. Is there a way to reorder folders manually? I use 140.0.1esr (64-bit).

I keep installing the Add-on to customize the message body toolbar. Unfortunately, the toolbar returns after a while. Now I can't seem to find the Add-on to customize it.

Any ideas? James

When I double click on an email in my inbox, a new reply email is being displayed with a yellow message across the bottom saying:

   "A unique identity matching the From address was not found. The message will be sent using the current From field and settings from identity XXXXXXXXXX."

This happens only on my default account.

What can I do to get the email opened in a new tab as a default? See the attached context menus

Thunderbird: 140.0.1 (64-bit) Windows 11 Pro

For years I an accustomed to using prepared signatures (or phrases) to include in my emails. That has disappeared from my otrgoing email page, How can I retrieve it? Ray Lampard

Hi Folks. Todays date 21/07/2025 Since 17/07/2025 I've been getting a error message. Unable to write the email to the mailbox . Make sure the file system allows you to write privileges , and you have enough disk space to copy the mailbox. I've gone into settings and cleared the cache ( that didn't help ) I've uninstalled thunderbird and re installed ( that didn't help ) . What else can I try ? Thank you

This behavior started suddenly today. Every time I quit Thunderbird (by selecting "Quit Thunderbird" from the drop down menu) the program appears to close normally, but about a second or two later I get a pop up saying "thunderbird quit unexpectedly". Happens every time I close the application. Otherwise everything seems to be working fine within the program itself. I checked for crash logs, there are none. I tried running in Troubleshoot Mode, same behavior.

Any ideas? Maybe just a fresh re-install?

I keep getting a pop up when opening my mail that reads, "The folder on inbox (then gives my email address) could not be compacted because writing to folder failed. Verify that you have enough disk space and that you have write privileges to the file system and then try again".

I don't understand!!!

The subject says it all. I am expecting to see a link to page(s) that describe how to create an account and supply the necessary details. I managed to create an account for outlook, but can't repeat the process for AOL/verizon for what eve reason,

-m

Over the last month or so I've been been getting a lot of junk which is timestamped with future dates - like 2066 for example. Presumably this is done to promote the message to the 'front' of my inbox. Unfortunately there are now so many of these that I risk overlooking more important mail. Is there any way of filtering out 'impossible' dates I wonder? Any help would be gratefully received! Robin.

Hello I need help. When I automatically add an MS work account as Exchange, I can send emails but not receive them. However, when I select IMAP, I can receive emails but not send them (I get a message that logging in to the server using my username failed). My private MS account is configured correctly by default, and everything works fine (at first place).

ver 140.0.1esr x64

Hi all.

Previously, when moving to a new computer (Windows 11) with Thunderbird, I would install a new instance of Thunderbird on the new computer and run it once. This created the default Thunderbird profile in the Profiles directory. I would then copy the contents of the existing Thunderbird profile into the new one. This allowed Thunderbird to be fully operational with all accounts and filters working, requiring no further setup.

In version 140, I have followed the same process. While I do see all of the email accounts, they are not functioning.

Any advice on how to do a migration with Thunderbird 140 version?

Help!

I'm getting constant pop-up notifications for an event on my Gmail calendar, and I can't dismiss or snooze them. I tried deleting the event via my iPhone calendar, where the event was originally created.

It's driving me crazy. I just switched to Thunderbird from Outlook, and I'm ready to abort mission. I can't use Thunderbird if it is going to send me reminders for orphaned or corrupted calendar events I can't dismiss constantly.

Please help!

Here is the error message:

Error Code: MODIFICATION_FAILED

Status Code: 2,147,500,037, null

Server Replied with 400 If you're seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view.

I have visual issues and cannot read thin text. I am trying to set up a Windows machine where it defaults to thin text. Yes, both Windows and Thunderbird allow users to increase font size and scaling, but I don't have enough screen size. It's much more helpful to increase font weight, and only somewhat increase some font sizes.

I already have /* Global UI font */

• { font-family: Andika !important; }
• { font-size: 12pt !important; }
• {font-weight: bolder !important;}

Which makes the message list good and bold, and

1. threadTree tr[data-properties~="unread"] {

color: red !important; }

Which distinguishes unread messages.

But for whatever reason, the fix doesn't extend to the messages or the settings page.

I have a windows 11 desktop and Thunderbird 140.0.1 (64-bit) loaded. I have two email accounts. One is an AOL account and works perfectly on Thunderbird. The second account is Gmail which was working fine but at the end of May it stopped working on Thunderbird, usually with a timeout error message. I ended up deleting the account and tried to add it back into Thunderbird. When I try it won't add it. Thunderbird spends 3-4 minutes checking password and then gives me an error message that the configuration, password, or email must be wrong (see picture). But the email and password are correct and work every day. The configuration is IMAP, SSL and has the correct goggle addresses and ports. I have tried both OAuth2 and Normal password but still get the same issue. I have deleted the Gmail saved passwords, will allow cookies and my Gmail account allows IMAP. Help Please!

My copy of Thunderbird seems to be suffering from an email hijacking problem that seems to have be creating message reception delays. Has anyone else happened to have that problem or knows how to get rid of it?