Thunderbird Community Forum

I've been using Thunderbird for about two months now and I just realized that Thunderbird (150.0.1) seems to be unable (or unwilling) to use some of the fonts that are on the computer (Windows 10, plenty of RAM and disk space).

Let me explain that I don't send a lot of emails, and most of the ones I do send are just a few lines so I had not had any reason to bother with the font -- the default font was fine -- until today...

Today my experience with fonts in Thunderbird was extremely disappointing. It started when I was composing an email and I copied/pasted some text from a web page into the email. Rather than treating the pasted text as simply text to have in the default font, Thunderbird put it in some strange font and size. This might have been Thunderbird's attempt to use the font from the website but neither the font nor the size resembled the text that I had copied/pasted. That was when I noticed that Thunderbird does not let you choose the actual size but only offers the choice to make text larger or smaller. Making the text smaller was sufficient for that particular time.

As I finished the email, I tried to sign my usual signature. Thunderbird lets you choose the font but once I had chosen the font that I routinely use for my signature, I discovered that Thunderbird totally ignores the choice that it just let you make. Instead of displaying the signature in the chosen font, it displayed my signature in a plain sanserif font.

I could live with a limited choice of fonts -- I have used another program where the only choices were serif and sanserif -- but I cannot understand why Thunderbird would offer a font choice menu that includes all my installed fonts when it actually only honors three choices. The only fonts reliably used seem to be some generic sanserif font that Tunderbird calls Helvetica/Ariel, a generic serif font that it calls Times and another serif font it calls Courier.

The dropdown menu lets me choose any of the fonts I have installed, some of them display properly while composing the email, others don't. If I send the email to another of my email addresses, Thunderbird displays the text the same way -- some fonts are correct and some fonts get replaced with one of Thunderbird's generic fonts.

I'd really like to have all my fonts available -- but that doesn't seem to be possible with Thunderbird so I guess I need to figure out which fonts Thunderbird is willing to use.

Everything has been fine for several years but this morning I now get error: TB could not connect to server mail.twc.com, the connection was refused. Spectrum says everything is good on their end. What do I have to do to "fix" Thunderbird? I can't send or receive any emails from 5 accounts with Spectrum and the emails are there when I log in at WebmailSpectrum.net..

I recently bought a new HP laptop running Windows 11, and installed Thunderbird I am still using an older HP laptop running Windows 10, running Thunderbird for years without issues

I installed Thunderbird on the new Windows 11 laptop (without using the USB drive for the profile) and managed to carry over the address book using my account from the old laptop. It is working, but acts odd when deleting emails.

When I delete an email (by highlighting it and hit Delete) in the Inbox, it disappears from the Inbox, but it still shows up in the All Mail folder. When I try to delete it from the All Mail folder (by highlighting it and hit Delete), it disappears for a split second and then comes back. The only way to permanently delete ANY email is to move it to the Local Folders - Trash.

It's like playing whack a mole!

I'm wondering if there is some setting issue, or if I should just uninstall Thunderbird, reinstall it again using the USB for the profile from the old laptop and start all over.

I would appreciate any help!

With 03.04.2026 they began to notice that the attached emails in eml format (the attached emails have attached documents, mostly pdf) sent from yandex mail stopped opening. Everything used to open well. Eml also does not save to disk. If you send the same files via Gmail, everything opens. Program version 150.0.1

All folders are shown ticked but they do not appear. I can view one folder at a time with Go>Folder>my account>Inbox(say).

Using IMAP. Firefox 151.0.4 I don't know what I could have done to cause this.

I've been using T-bird since nearly the beginning, and I've always been able to search for a string in a message by hitting the slash ("/") and typing my search string. This appears to be a shortcut for Ctrl+F (on Windows, currently Windows 11).

With T-bird 151.0, when I press "/" it is ignored... the first time I use it. If I press Ctrl+F and do a search, then I can start all subsequent searches in that message with a slash. If I close that message and open another, I must again use Ctrl+F the first time I want to search.

My muscle memory constantly forces me to type "/<string>" to search, but since T-bird ignores the slash, the following characters immediately take action, usually causing me to navigate away from the message, mark them as read/unread or as junk, etc.

Since I can use "/" on subsequent searches, I'm thinking this is a bug, not a feature removal. Can this be checked/confirmed? ...thanks!

I have connected a Google Workspace (Gmail) account to Thunderbird, let's call it scott.harper@myorg.org. I am able to send, receive, and reply from this account as expected.

In my Google Workspace configuration, I have an alias address forwarded to my account, let's call it info@myorg.org. I receive messages addressed to "info" just fine. But when I send or reply to messages addressed to "info", I'm running into a problem.

In the Account Setting I opened Manage Identities, and added info@myorg.org as an alternate identity. I then edited the Private Data for that identity so that the "Reply from this identity when delivery headers match" option is checked, and set to match info@myorg.org. See attached image.

When I reply to an incoming message, the From field appears to be (sort of) correct... it shows from info@myorg.org, but next to it (in italics) is the primary account identity, scott.harper@myorg.org. See the other attached image. This is also the case when I compose a new message and select the info identity.

In both cases, when the message arrives at the destination inbox, it is from scott.harper@myorg.org instead of "info".

I'm assuming I don't have the matching rule, or some other setting configured correctly. Would appreciate any other tips/ideas.

I am unhappy with version 150 of Thunderbird. In earlier versions, I was able to access the full range of emojis when writing an email. That is no longer possible; I can now only access a few. The integration of add-ons with Thunderbird isn’t working properly. After adding the German dictionary, Thunderbird froze; after adding ImportExport Tools, Thunderbird not only crashed but also wouldn’t start up again.

The import function does not work. I exported a Thunderbird profile in its entirety into a zip file that is only 127 megabytes when extracted. When I go to import the Thunderbird profile, I select the ZIP file, import, and it restarts, and nothing happens.

I have tried the method of going to the profile folder, manually copying the files from the extracted profile, and pasting them into the profile folder and overwriting all of the existing files, which will work for a few seconds- it briefly shows all the emails, and then they disappear. The top of the inbox indicates the correct number of emails, but no emails show up in the inbox, and when I restart Thunderbird, everything disappears.

Server Posteingang IMAP (empfohlen) imap.vodafonemail.de Ports für Posteingang IMAP SSL: 993 / TLS: 143

Server Postausgang SMTP smtp.vodafonemail.de Ports für Postausgang SSL: 465 / TLS: 25 oder 587

Good afternoon.

The message was composed using a translator I have 3 mail for work. 1 personal, 2 shared There are no problems with my personal email. I can't send messages from two other emails, and I get an error

Error translation "Error sending message. Error sending mail. Mail server responded: Error: send AUTH command first. 1777978756-Gxds2c0SZiE0-r8k7j8Ju. Make sure the email address you specified in your account settings is correct and try again."

I'm running Thunderbird most recent version. After changing my Google password, I can no longer connect through Thunderbird to Gmail. I've tried uninstalling Thunderbird and reinstalling. I've tried deleting the Gmail acct info from Thunderbird and setting it up again. I get the pick IMAP screen, enter my new Google password, then get a Google 400 error stating "The server cannot process the request because it is malformed. It should not be retried."

Any ieas?

I have an IMAP account with three folders in it that I need to keep below quota. They are Inbox, Sent, and Deleted. Among my local folders I have Archive of Inbox, Archive of Sent, and Archive of Deleted. I have three message filters that move old messages from the IMAP folders to their corresponding local folders. I understand that these filters have to be run manually, not automatically, because their source folders need to be set before each run. None of the filters is enabled, I'm not sure what this setting does but I think it prevents Thunderbird running the filter automatically. Each of the filters has Manually Run checked and all other options left unchecked. The retention policy for each IMAP folder is 'Use my account settings'. The relevant account setting is 'Don’t delete any messages'. I would therefore expect messages to remain in my IMAP folders until I run the filters, but that does not seem to be what is happening. I delete several messages per day and they go from the inbox into the deleted folder, but the total number of messages in that folder doesn't increase - in fact it sometimes decreases whilst I'm working. It is as though a ghost is running the filters when I'm not watching. Can anybody tell me what is happening?

I just deleted the folder C:\Users\alan\AppData\Roaming\Thunderbird and replaced it with a backup I made a few days ago. To my surprise, when I opened Thunderbird, I could see messages that I'd downloaded today. What is going on?

I double checked all data (IMAP and SMTP ports, passwords, mail adress, ... And I tried it on 2 brandnew computers (one PC; one laptop), running on Windows 11 I've no idea, what else I could do

Hi. I have four gmail accounts and use a desktop pc runnings windows 11. I have been using thunderbird as my desktop email client for many years, but recently, something has changed. My incoming emails are not formatted correctly and the links in them do not work. I'm not sure I am saying that correctly, so I will attach a screenshot. I would love some advice on how to fix this! Thanks, Cheryl

I used to just have my Canon TS6350 do my printing. Great. Now Thunderbird seems to have taken over my choice of how I print for a long while and it's driving me nuts. It is a dreadful system. I have searched settings to no avail. Can someone advise a Geri Brit of 82 how to deal with the problem Thank you very much Kind regards Alan Jones

I have just set up Thunderbird on a new Windows 11 PC. So far as I can tell I have filled in the server details correctly. I can receive incoming mail. However, it fails to send emails out - I have tried a couple which I know are correct. Error message is: Sending of the message failed. An error occurred while sending mail. The mail server responded: <<snip>>: Relay access denied.

Please check the message recipient "<snip>" and try again.

(I've removed the actual mail address from the error message.) I've read the answers to previous versions of this query and made the correction as suggested. This hasn't helped. Any suggestions please? Many thanks, Roger Moore

Hi, To "save" the info in my Local Folders? Are they excluded from Compacting? I use this folder as a "what I've done" library. The others I don't care about. Thanks