Thunderbird Community Forum

Options allowed me to set background colour, needed urgently as I am visually impaired. Online advice to set colours is: tools/options/...............go from there But options has disappeared now. Should I revert to an earlier version of Tbird, or can you reinstate, OR do I look elsewhere for an email app?? I am a longterm user, and wish to continue with Tbird. Oldcove99 // Aug 2 2025

New user: I installed Thunderbird and selected POP. Everything went fine during setup including message from Microsoft

Microsoft account New app(s) have access to your data Thunderbird connected to the Microsoft account W********@outlook.com.

When I click on done I receive the following:

"Unable to log in at server. Probably wrong configuration, username or password

Not off to a good start.

Chip

When I click on an email in my mail 'inbox', items open in a 'send' window? Why don't they open into a 'read' window? Why are emails opened with red outline boxes and largely inaccessible? Can you help? Must I reload Thunderbird and Firefox? Are there tweaks that I am missing. I have spent several hours trying to sort this out, so far no luck!! Can you help?

Windows 10 on PC with Thunderbird 140.1.0esr (64-bit) Since the last update, the background on my Tbird messages list, email panel and in my compose email panel have turned from my eye-friendly light grey to glaring white and this is literally causing me a headache and a "flimmer" in my eyes (common in people with blue eyes). All other programs in Windows show me the light grey background as they should, it's Thunderbird itself which isn't picking up the light grey. The only place in all the tools and settings menus that I was able to find ANYTHING about background colour was (three bars) -> tools -> Settings -> HTML Style [ ] Use reader's default colours <- makes no difference whether this box is marked or not Beneath that: Text Colour is set to black. Background colour is set to light grey. There is no way to Save the settings page, so one presumes they are automatically saved. Restart (done several times) Thunderbird - still this blasted white background. I do not use HTML for emails, I use plain text. Could someone please tell me how I can get my light grey background back ?

This morning an email from my inbox accidentally went into my deleted box. I have always been able to click on "More" and been able to move it back into my inbox. Today "More" had new options and moving to another location was not one of them. What happened? I often click 'delete' by mistake and have to move it back to where I really meant the email to go.

Hello,

I've been using Thunderbird for a number of years on my Windows 10 computers (one at a time). I used to have my email hosted by Cox, but it moved to Yahoo a year or two ago. At that time, I changed my IMAP and SMTP servers from cox to yahoo.

Suddenly, the other day, I'm not longer able to send or receive email messages in Thunderbird. I can still send and receive at Yahoo.com.

Here's the setup that I've been using in Thunderbird:

Incoming Mail (IMAP) Server

Server - export.imap.mail.yahoo.com Port - 993 Requires SSL - Yes

Outgoing Mail (SMTP) Server

Server - smtp.mail.yahoo.com Port - 465 Requires SSL - Yes Requires authentication - Yes

When I click on my inbox, I get a dialog box that says:

"Login to server imap.mail.yahoo.com with username davidmorrison@cox.net failed."

Maybe I should set up another account, with my same name?

Appreciate any help you have!

PS: I DO donate every year or two to Thunderbird...

Thanks.

David Morrison

I recently updated my wife's extremely old Thunderbird version (52.??? or thereabouts) to the latest available version -- 141.0. Her address books vanished. Hoping they are somewhere in the Thunderbird folder waiting for someone in this forum to tell me how to access them. Thanks so much.

Please, how do I get rid of this message, which is preventing me from sending any emails: "Sending of the message failed. An error occurred while sending mail. The mail server responded. Blacklisted by spam filter. Please contact customer service. Please check the message and try again." With pretty desperate regards, Gillian

I need to copy my Thunderbird profile from my Linux partition to the MSWindows one. All the tutorials I've seen claim I can just let MSWin create it's AppData directories, exit TB, then copy my profile and profile.ini over to there.

Doesn't work. It ignores my existing profile and starts creating a new one, and wants me to enter a new account. have 10 different accounts, filters, and other customizations, and I am *NOT* going to manually recreate everythin

I have an old Windows 8.1 computer with Thunderbird installed and it has worked fine. I want to move my email to a new Windows 11 computer. My old Thunderbird is listed as version 115.18.0. The version on my new computer is listed as 141.0 and is listed as up to date. NOTE: On my old computer my 115.18.0 version is also listed by Thunderbird as "up to date." Apparently, Thunderbird cannot update my old computer version any more.

Here's the problem. Thunderbird's instructions for moving my email from one computer to another includes this warning: "To move your data, you can copy your profile folder to the equivalent location on your destination computer. Ensure both versions of Thunderbird are up to date or identical before attempting a transfer as otherwise it might fail."

So, since Thunderbird does not allow me to have "identical" versions on my two computers, how do I move my email from my old computer to my new computer? (I apologize if this question has already been asked and answered.)

I am running WIN 11 and new Thunderbird 140.1.0 and changes in setting are not holding. For example, de-selecting start page so I see no start does not work. I get the new dark page upon restart. Also, in appearance I de-select hide system bar and that does not hold, as well as select table view but upon restart I get card view. Any tips or tricks would be helpful. Thank you for your time and effort.

Every eMail I get is now being marked as read when I move it to trash, including Spam, even if it is not read. I do not want this behavior. I did not change any settings. Thunderbird started doing this automatically, several days ago. I want everything that is unread to remain unread, ESPECIALLY Spam.

How can I change the Thunderbird Profile filename (instead of the random number)? I don't see this in the existing help files, and searching didn't find any similar questions I want something recognizable, like "thunderbird profile as of July 2025"

I see several folders within Library / Thunderbird. Some say "profiles COPY mm/dd/year" but the one titled simply "profiles" seems to be the active one. All these folders contain the same three random numbered files, and the one named xxx.default seems to be the one in use. I see two more users on startup, their files named xxx.TEMP and xxx.OCT2015 which I never use. Might be leftovers from when I had to change the SETTINGS around.

Hi, until recently I used to get a reply-mail from my affiliate partner in my Thunderbird mail, but it's not working anymore.

I am trying to find a spam folder where I can check and possibly exclude that?

Please, help. Thanks.

Although I certainly do not keep all emails, I do file a LOT. I have about 200 folders for topics and people. I use the filing feature EVERY SINGLE DAY. Suddenly when I looked at email today, the message filing feature is missing. I have to have this feature.

I am a retired librarian. This may explain my love of with organizing and storing. I suspect I am not the only person horrified to see things missing from Thunderbird today.

My husband and I have used Thunderbird ever since Qualcomm stopped supporting Eudora.

Messages going to JUNK is STILL a problem even today after the downgrade. I know to use Shift-J, but Thunderbird DOES NOT LEARN. This is annoying, but less important than the filing issue.

Although I have been using it for years, Thunderbird stopped sending my email messages and gave an error message looking for my Password. I looked at my Account Settings and there is a Red Box with Delete. This came on suddenly. I downloaded a Thunderbird Upgrade & installed it however it didn't fix the problem.

How can I fix this without Uninstalling the program. There is too much data saved including a substantial Address book that I can't afford to lose.

While writing a message the editor freezes, First 10-15 characters are fine, then every 10 characters or so it freezes -- comes back, but freezes again. You can't type at more than 1 characters/sec or so! So It has become pretty useless.

It has become unusable as a mail tool -- I have no themese -- no add-ons .. NOTHING .. only filters on incoming messsages.

I just reinstalled TB fresh -- no difference -- same behavior!

It happens with gmail accounts, yahoo accounts, hotmail accounts and my other imap accounts. I have removed and reinstalled TB -- no difference .. it freezes --

I do have large mail boxes -- of 7 accounts I have on it, 3 of them have more than 2GB mail data. But we aren't doing search -- just plain email writing is impossible.

I am using Thunderbird on MxLinux (Debia bookworm ) Installed TB fresh on new built machine in May, 2025. It worked fine for maybe a month and then it started this behavior.