Thunderbird Community Forum

I've been using Thunderbird on Windows 10 since last year sometime. Currently I'm on version 151.0.1.

I've 4 x mailboxes here and since yesterday, 3 of them show me an unusual message when checking for emails. I tried attaching a screenshot but although the screenshot uploaded, I couldn't find a way to insert it here. But the message says Unable to write the email to the mailbox and asks me to check if I've write privileges (which I have) and to cheek the available disk space.(currently 101GB free).

The message is happening 2 or 3 times each day and lasts for about half an hour, then everything works fine again. Has anyone else seen this??

i manage 8 email accounts for different projects I run.

When I open thunderbird, all my folders in each email open up. Is there not a setting to say don't open folders?

Have been successfully running Thunderbird for many years on Windows 10 on 2 different private computers. Within the last week both computers unable to send and receive messagees. BT E mail account is absolutely fine as can access it via webmail and via Android e mail app on my phone. Login details have not been changed. Have tried updating to 150.1 no joy. When trying to send a message we receive Send Message Error immediately but with no explanation as per attached image.

Thunderbird 148+ on Windows 11 repeatedly prompts for the password when synchronizing an Exchange account (professional) configured with the native Exchange support (no add-on installed).

The account only offers “NTLM” or “Normal password” authentication methods. OAuth2 is not available in the account settings.

During synchronization, Thunderbird asks for the password separately for many folders. However, clicking “Retry” usually works immediately without changing the password, and manually re-entering the same password also works.

The issue then reappears for the next folder, causing continuous authentication prompts (I have many folders...).

Actions already tested:

• deleting saved passwords and tokens,
• deleting/renaming key4.db and logins.json,
• restarting Thunderbird,
• recreating the account.

The problem persists.

This looks like an authentication/session handling issue rather than an actual invalid password.

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)"

I use vertical view. Hate threading so that's turned off. I use a medium to large message pane. Recently been having issues with column visibility. Not sure if this is new or whether it's that I've come to a Linux client from a Windows one and there's a setting I missed when I set up the client.

Essentially dragging the column divider doesn't work properly (for me). The columns always seem to auto adjust width. Similarly if I resize the message pane the columns don't remain fixed they auto adjust.

I don't find this helpful. I prefer to set up the columns to display the amount I want/need in subject and From and I truncate the date to simply not display time.

How do I set column widths to remain where I put them? Or is this function now lost.

I'm reading the question Thread's broken sorting makes it completely unusable and I have to agree that order of messages within thread is not the best one - ascending. For example, I am subscribed to a forum messages and I'm getting all the notifications for a topic to a thread. Currently I have like 85 messages in a thread and to see the newest one I have to scroll all the way down each time - scrolling 85 messages is a lot and it is getting worse because the number of messages keeps growing. After I've seen the newest message, I have to scroll all the way up to close the thread. (or am I missing something - perhaps some shortcuts?)

But I guess for some such ordering is obviously fine. Hence, I guess, an option how to sort threads might come handy. Perhaps even having a default sort order and an override per thread?

PS. funnily enough, I'll have the same issue with notifications for this question :)

Today I created a subfolder and moved many precious e-mails there. That move was successful. Thereupon I shut down my Thunderbird and my computer. When I restarted my computer and my Thunderbird the folder which I created was empty. Please let me know how I can recover the e-mails. Thank you.

When I try to send an email, I get the following response. Sending of the message failed. An error occurred while sending mail. The mail server responded: invalid user ID or password. Please verify that your email address is correct in your account settings and try again. Have looked in account settings and cannot see a password anywhere. Email address is correct Help please Carol

I'm using gmail/outlook/hotmail email addresses on a new win11 laptop with Surfshark VPN and getting email up & running is the last major set up issue. I am having issues with both send & receive emails across all addresses. I get some functionality if I pause the VPN (not ideal!) but not total. I have tried the Surfshark bypass function for Thunderbird but without success.

I have had no issues with this setup for many years on win10.

Using Outlook (one email address) on the web with the Surfshark Chrome extension I can both send & receive.

1. what should the IMAP & SMTP server settings be for gmail/outlook/hotmail? 2. are there any known issues with Thunderbird/Surfshark? 3. are you aware of any issues with gmail/outlook/hotmail blocking Surfsahrk?

Alan Burdis

In event creation in Calendar the options for repeat pattern are daily, weekly, bi-weekly, monthly or yearly. There is an option to create a custom pattern, but if I enter every 28 days, because I want the event to recur every four weeks, it is over-ridden by the option above which is the repeat pattern, daily, weekly etc and the event appears daily. There appears to be no way to create an event that occurs repeatedly every four weeks (28days)?

Can anyone help please?

I would like a view by Year option in the Thunderbird Calendar. Since Microsoft Calendar tries to launch Outlook and setup a new email address when you try to use just the Calendar it has become not useful to someone who does not use Outlook. You can get the Calendar app to launch into the Calendar on the 4th try but it's inconsistent and a pain. I was trying to check a date/month by displaying the Year view with the 12 small monthly calendars like the Microsoft Calendar has and found you cannot do this. I'd prefer it as a feature rather than a plug-in. Thanks

Subject: Persistent Column and Folder Layout Issues — Not Being Saved Between Sessions

This is a follow-up to my previous support requests regarding two ongoing problems that significantly impact daily usability.

Column Settings I manage multiple accounts, and my preferred column layout is: Starred, Read Status, Attachment, Subject, From, and Date/Time. I do not use Threads, Correspondents, or Spam Status columns. Despite setting these preferences repeatedly, Thunderbird fails to retain them. Every day I must spend time reconfiguring columns across some or all of my accounts — the state varies unpredictably from one session to the next. This is a persistent, daily frustration that costs meaningful time. Most other major email clients save and reliably maintain column preferences. I'd expect Thunderbird to do the same.

Folder Panel Layout Two problems occur regularly when Thunderbird loads:

Folder order — Standard system folders (Inbox, Sent, Drafts, All Mail, Trash, Spam) should appear at the top of each account. Instead, Sent, All Mail, Trash, and/or Spam are frequently scattered among custom folders, with no apparent consistency.

Folder expansion — Most or all folders load in an expanded state, exposing every nested sub-folder regardless of whether they contain unread mail. This creates unnecessary visual clutter and requires manual collapsing each session.

Again, this behavior is uncommon in other widely-used email clients. Summary These are not one-time glitches — they recur daily and represent a significant usability gap. I'd appreciate confirmation that these are known issues being tracked, or guidance on a reliable fix. Reformatting the interface every morning is not a reasonable expectation for users.

When I get spam email in my inbox, I mark it as SPAM. It will arrive again in a couple of days. Why does it come into my in-box still? Its marked as SPAM in my In-BOX!

I don't want to keep touching junk email!!! its a huge waste of time. I cannot find the settings on how to make that action happen.

Please advise. If this isnt possible I will unfortunately be leaving your platform after decades of use. Yes I have donated several times over the years. Not get rich money, but it all helps.

Dean

I recently moved from Microsoft Outlook email to Apple icloud email. icloud allows you to create an application-specific password, which I did for email. It works; I can login to email on Thunderbird using my (impossible to remember long) password automatically generated by Apple. I switched the Thunderbird server settings to OAuth, but unlike with Outlook, there was no popup saying a restart of Tbird is required. When I quit Tbird and restarted, it did not prompt for a pw, but neither did it get any new messages. (I sent new messages from another email service to verify.)

I also noticed that OAuth2 was not an available option for the outgoing server, as it was with Outlook.

Does OAuth2 not work with icloud email?

There appears to be no way to change the app-specific icloud pw in Apple, but I will take that up with Apple.

Perhaps the workaround is to use the Tbird saved pw feature?

Dear all,

For aprox. 3 weeks now Thunderbird asks me a short time after startup for a login.

It shows up a dialog with the text : "https://caldav.gmx.net verlangt einen Benutzernamen und ein Passwort."

The problem is, that I maintain several GMX - accounts and I've no idea, which credentials I have to enter :/

How can I find out ( without inspecting or debugging the source code ;-) )

THX in advance and best regards!

Can't get email from Comcast server any more & a lot of existing emails disappeared. Was on the phone with them & reset ports & checked other things but it didn't work. I can read them at Comcast's site & also send & get them there. Also can you help me forward my email to another email program?

My old provider has stopped supporting my old email address and I have changed to a gmail address. How do I remove the IMAP and smtp settings etc for my old email address? Also remove all trace of that unwanted old address please?