Thunderbird Community Forum

Hello,

I'm trying to create a calendar event with irregular recurrence. Not only is the starting time different, but also the duration. Since AFAIK this is not possible using the interface, I directly edited the .ics to this:

RDATE;VALUE=PERIOD:20260506T063000Z/20260506T130000Z,20260507T054500Z/20260507T110000Z

I then manually synced the calendar. The starting time is honored, the duration, however, is not. I found the entry in the .ics changed by Thunderbird to this:

RDATE:20260506T063000Z RDATE:20260507T054500Z

How can I get Thunderbird to honor the different durations?

Thanks

Thunderbird keeps opening a Google authentication window, asking which account to use. I have two gmail accounts (both of which work just fine), and another google account that I manage a calendar for (it works fine as well). How do I work out which account is seeking authentication?

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

Hello,

Everything working just fine last night. Wake up and Thunderbird will not retrieve emails.

Remembered this old message I got so I went through and deleted my second email address, didn't help.

https://support.mozilla.org/en-US/kb/thunderbird-and-yahoo

Checked all settings compared to Yahoo, still won't download messages. I can even send a message with my current settings no problem, and it does login, just won't retrieve emails. Gives me a connection timeout.

Anyone have any ideas?

Hi community,

I want to have the same font and font-size in:

• my HTML message body text
• my signature.html file

so I can send consistent and nice-looking e-mails, like you would expect.

Here are my current settings:

• Settings > General > Language & Fonts > Fonts >
  • Default font: Arial
  • Size: 12
  • Advanced: For both "Latin" and "Other Writing Systems" I have the settings you can see in the attached screenshots.

I heard that these settings are for personal viewing.

• Settings > Composition > HTML Style >
  • Font: Arial
  • Size: Medium

I heard that these settings are for viewing by recipients.

The first line of my signature.html file looks like this: div style="font-family: 'Arial'; color: #222; line-height: 1.0; font-size: 14px;"

There is always a slight font size mismatch of the message text with my signature.

I unsuccesfully tried tweaking the html font size values in px or pt to match the given size in Settings > Composition > HTML Style for Medium or Large.

It seems that the available font size granularity of Medium or Large just does not match corresponding pixel or point values?

I would be extremely grateful if someone can guide me on how to achieve this!

If there is no valid solution for this problem, I'm happy to open/report an issue on this.

Thank you and have a wonderful day

送受信メールが表示されなくなりました。 テストメールの送受信は問題なくできていますが、thunderbirdメールソフトには表示されません。 XserverにWEBメールは生きています 表示されない問題を解決するためにAIに聞いたところ、「受信トレイ→右クリック→最適化」を実行したが、それまで表示されていた過去の受信メールがすべて消えました。 本体からメールが消えたのかAIに改めて聞いたところ、画像の「INBOX」の状態になり、消えてしまった可能性が大きいとの回答でした。 ウィルスバスターを導入しているので、それが干渉した可能性も考えられます

対策として「アカウントを削除して、新たに設定しダウンロードを提案されました。この方法で復活するでしょうか

https://g.co/gemini/share/6a7da4881c86

In Thunderbird all of a sudden my sent e-mails are going in to the sent box of ANOTHER e-mail address I have on Thunderbird. I looked at some similar posts and think my settings are correct but obviously not. Please help! Thanks, Adam

My grandson got on my computer and was messing around with my email. Now when I open Thunderbird I get a pop up window that says sign in with google to continue to Thunderbird. It has my grandson's Gmail address in it and asks for a password. I can X out of it and continue to Thunderbird but it will pop up several times while I am reading my email. Why is this happening and how do I get rid of this pop up window.

I apologize for the subject line, but there is no better way to describe the problem....

I've been using Thunderbird for a few months now and it has mostly worked well. Then this afternoon I was reading my mail in the Unified Inbox and I noticed something very odd. I had a number of emails showing in the header list with the same "From" and various subject lines. On the face of it, that wouldn't describe any weird behavior except that I noticed the subject lines absolutely didn't match the "From" information.

As I would go to read these emails, the email itself would be correct in the preview pane -- including showing the correct sender name and email -- but the "From" information in the header list pane would still be wrong.

I'm sorry that I can't post a screenshot to make this more clear because there is just too much personal information on screen. But these emails are from several different senders, received by several different email accounts. Everything is correct except that the "From" shown in the header pane is wrong. This is very obvious to me because I normally run entirely in the Unified Inbox with the emails sorted by the "From" information

One example is an email that is actually from "U.S. Department of Veterans Affairs <do-not-reply@notifications.va.gov>" which Thunderbird displays correctly in the preview pane (where I usually read my emails) and if I open the email itself, but the header pane says this email is From "Prepper-co <joshua@prepper-co.com>"

Another example is an email that is actually from "USPS Customer Support <uspscustomersupport@usps.gov>" but the header pane says it is from "Rainier Arms

These two examples were received in different email accounts that aren't even on the same server. I have other emails from these same senders that are shown correctly

I found this problem while using 150.0 (64-bit), which said 150.0.1 was available, so I restarted Thunderbird and it updated to 150.0.1 (64-bit) but the problem is the same.

I have multiple email adresses for different purposes, but all of the incoming emails are sent to the Local Folders inbox, where I have separate folders to save emails for the each purpose. I am able to manually sort the folders in the order that I prefer, however each time I shut down Thunderbird and then restart it, the folders end up in seemingly different random order each time. Is there a way to ensure the manually sorted order of the folders does not change?

I can't open an email attachment with last part rs6.net. This is a reliable email with important information I need for a church conference.

I want to move some contacts from one mailing list to another. How do I do that?

How do I add a contact to an existing mailing list? The contact is already in my address book and is not a new contact.

I have spent literally hours on this - as has my webmaster from LaborArts, and my support desk at Firstlight.net, which provides the email.

I have used Thunderbird as an email platform for decades. in the past few weeks it has stopped keeping copies of sent emails and stopped saving drafts IF they contain any links or photos or anything other than plain text. I get a message allowing me to save it to the local folder on the computer. This is useless, as I use the email via a browser at work AND on computer at home, so it needs to be saved on the server.

Can anyone help? The message exactly reads: "Your message was sent but a copy was not placed in your sent folder (Sent Items) due to network or file access errors. You can retry or save the message locally to Local Folders/Sent Items-rachelb@bestweb.net"

THANK YOU FOR ANY HELP YOU CAN OFFER!!!

Comcast/Xfinity email services have migrated to Yahoo. Using Thunderbird I cannot send out a reply. the error message is "Login to server smtp.mail.yahoo.com with username leifsvensen failed."

I am getting emails in, but for some reason it is not asking for a password when I open up Thunderbird. I would like it to ask for a password every time I open Thunderbird.

outgoing mailbox settings: Server name: smtp.mail.yahoo.com Port:465 security: SSL/TLS Authentication: normal password user: leifsvensen

I have also tried it with authentication turned off and get the same result.

Thanks Leif Svensen leifsvensen@comcast.net

Hi, very nice of you to listen to my problem. It already startet some days ago when I realised that it took very much time to receive mails, in some the content still kept hidden. To work with the about 60 mails listed in the Income-folder, and select some to read the text I was surprised to realize, that in the next moment the folder was empty, none of the mails could be seen on my Windows laptop. I had to switch to the mail-server with Vodafone to see me mails. This situation occured with all folders on 2 Laptops with Windows 10 and windows 11. What could I do ?

Trying to sync my outlook and gmail calendars in Thunderbird 140.10.1 and consistently getting an error I haven't seen before: "status.Settings.138". Event log reads: Request: <Settings xmlns='Settings'> <DeviceInformation> <Set> <Model>Computer</Model> <FriendlyName>TbSync%20on%20Device%20fc68426d642076cda9a60b0dd8f3</FriendlyName> <OS>WINNT</OS> <UserAgent>Thunderbird%20ActiveSync</UserAgent> </Set> </DeviceInformation> </Settings>

Response: <Settings xmlns='Settings'> <Status>138</Status> </Settings>