Icloud calendar does not sync with Thunderbird calendar

I successfully linked / synced the thunderbird calendar with the iCloud calendar. Calendar entries manually entered in iCloud or iPhone calendar are successfully synced a… (read more)

I successfully linked / synced the thunderbird calendar with the iCloud calendar. Calendar entries manually entered in iCloud or iPhone calendar are successfully synced and are visible in the thunderbird mail. The other way round, syncing the existing entries in the Thunderbird calendar does not work. They do not appear in the iCloud or iPhone calendar. Searching the internet, the specific Thunderbird or Apple help-sites did not provide an obvious solution for this problem. I went through all (or nearly all) recommendations given by Apple, no success to sync from Thunderbird to iCloud.

Any suggestion what to modify or adjust

jm

Open 16 50

Message list background turned full black after 151.0 update

As the topic says, the message list turned from the usual dark-mode look, to a full black background after updating to 151.0. Was this an intentional change? How can I re… (read more)

As the topic says, the message list turned from the usual dark-mode look, to a full black background after updating to 151.0.

Was this an intentional change? How can I revert it?

Open 16 80

How to get rid of Caldav- und cardav authentication demand?

Thunderbird (actual version) is demanding constantly for caldav- and carddav authentications although the two mail accounts are deleted in Thunderbird. How can I get rid … (read more)

Thunderbird (actual version) is demanding constantly for caldav- and carddav authentications although the two mail accounts are deleted in Thunderbird. How can I get rid of these annoying messages?

Open 16 90

Linkage to an outlook account

I have had to replace my laptop and am trying to set up my new one with an existing outlook account on the new device. It is a Windows 11 device. I have used the exact se… (read more)

I have had to replace my laptop and am trying to set up my new one with an existing outlook account on the new device.

It is a Windows 11 device.

I have used the exact server settings etc from my old lap top for the outlook account but get a variety of error messages.

I have explored the use of the Account Hub and also switched that off/on. Same situation.

I attach five screen captured images so far. The first is the version of TB. The second is the window that appears when the account tries to connect and thirdly the small pop up that appears bottom right hand corner of laptop. The remaining two show the server settings and that they passed the connection test.

Other email accounts (gmail & yahoo) have both been set up on the new device and work well.

The account worked on the old laptop and continues to do so. I have set up the outlook account with, to the best of my knowledge, the same settings. The old lap top was a windows 10 device. The new laptop does not have a third party antivirus on it.

I am baffled as to what is happening and what I should do next. Any advice would be great.

Open 15 60

Attempting to install Thunderbird on an additional desktop using same address as my original computer has.

Attempting to install Thunderbird on an additional desktop using same address as my original computer has. That was my question: Lin answered: Please quote any and all er… (read more)

Attempting to install Thunderbird on an additional desktop using same address as my original computer has. That was my question:

Lin answered: Please quote any and all error messages you see, in full, verbatim. Screen shots would be OK.

Who is your email provider?

Have you compared all account settings, not just the email and password?

Here's my answer to those questions: "Authentication error" "probably wrong configuration, username or password."

My email provider is MTA (Matanuska Telephone Association) Yes, I currently use Thunderbird in my other desk top and it works fine.

Open 15 20

Apple Mail

I'm having so much trouble with Apple Mail and Thunderbird saving my password and I do have an Apple User Defined Password. So, I'm constantly having to input my password… (read more)

I'm having so much trouble with Apple Mail and Thunderbird saving my password and I do have an Apple User Defined Password. So, I'm constantly having to input my password. Any suggestion would be deeply appreciated!

Jerry

Open 15 110

Unable to send msg. Error: The server responded: RBL restriction: Blacklisted by Internal Reputation Service - 73.62.119.4.

Cannot send messages. I get an error code: Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: RBL r… (read more)

Cannot send messages. I get an error code:

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: RBL restriction: Blacklisted by Internal Reputation Service - 73.62.119.4.

This is a recent abberation. I've updated to the latest version of TBird. But cannot understand this message or why I get it. Please help as I forward/send many messages daily.

Thank you

Open 15 70

Memory leak with Thunderbird 140.6.0esr thru 140.12.1esr, and in Troubleshoot Mode. (14 active accounts, retention limited to 60 days messages)

Hi, I'm running the latest version of Thunderbird 140.12.1esr on 15.7.7 (24G720) on an M1 processor. I'm witnessing Memory leak > Thunderbird who usually use 800MB jum… (read more)

Hi,

I'm running the latest version of Thunderbird 140.12.1esr on 15.7.7 (24G720) on an M1 processor.

I'm witnessing Memory leak > Thunderbird who usually use 800MB jumps to Gb up to 60Gb

It makes this version unusable.

Here is a loom of the incident: https://www.loom.com/share/0b8e661b42d64d749d80adfd71fd1e04

+ a screenshot


Anyone can help ?

Best Olivier

Open 15 49

Broken Filters resulted from moving folder from Local Folders to imap Inbox & didn't autoupdate as stated. Now, messages either don't move at all or don't move to the specified subfolder of the Inbox folder (bug454589)

154.0 (64-bit) on Windows 11 My filters are broken in Thunderbird. I have deleted and recreated some to no avail. I moved some folders from Local to under my inbox and i… (read more)

154.0 (64-bit) on Windows 11

My filters are broken in Thunderbird. I have deleted and recreated some to no avail.

I moved some folders from Local to under my inbox and it said it would update the filters automatically, but noticed it didn't do this. Looking at the Filter Rules it just left either the first or second column of Perform these actions under the Filter Rules empty rather than updating them. I tried moving the folders back to see if the filters would then work, but it's a mixed bag. Some filter properly and others only go under say Newsletters, but don't filter into Newsletters > Adobe for example. Others just sit in the inbox. I've tried moving some rules to the top of the list hoping that'd give them priority to be run first, but it hasn't helped. I have a lot of filters setup to help me track newsletters, classes, meetings, job applications, etc. I've missed some responses for a couple of days because of this. Any suggestions?

So I don't miss anyone, thanks in advance.

Open 14

Unable to “Accept Permissions” after password update

Hi, I am unable to get Thunderbird to work after my microsoft password was updated. I get the popup & enter my email & new password, but I never get the second po… (read more)

Hi,

I am unable to get Thunderbird to work after my microsoft password was updated. I get the popup & enter my email & new password, but I never get the second popup to accept permissions. It just doesn’t go any further. I can see Failed login attempts for TB on the microsoft side. I am not too tech savvy, so I’m doing my best to troubleshoot!

This is Thunderbird 78.14.0 on mac 10.11, YES, that is old, it is a legacy mac! It was successfully setup with OAuth2 over 3 years ago & worked fine until the password update. I was able to add TB to an old 10.15 mac & it got the permissions popup & the account was added fine (but it is also using TB 150.0.2). Oddly, there was no 2FA prompts given, it just connected with my password only??

I had a number of devices that needed passwords updated, so I’m wondering if there was a conflict when trying to do this one? Do I need to delete certain files? I found where to delete the stored passwords & did that, but it’s not moving past that point to even store new ones & connect. I can’t grant permissions?

Also, I notice the successful TB login activity shows my IP address, whereas the unsuccessful one shows Browser Mozilla Firefox. I’m not sure if that helps with troubleshooting or not!

Thank you for your time!

Open 14 30

I suddenly have been getting a demand for my Primary Password after 20 years of no passwords - I used the one password I had and it wasn't accepted.

I have two Tbird accounts pmcreativeservices@rcn.com has been mine for 20 years, and it's what I use for bills, banking, etc. The other account is PatriciaRosemoor@rcn.co… (read more)

I have two Tbird accounts pmcreativeservices@rcn.com has been mine for 20 years, and it's what I use for bills, banking, etc. The other account is PatriciaRosemoor@rcn.com and is only used to collect messages that come from my author website. Yesterday, I got a message from someone who tried but couldn't put a book up at Amazon and asked if there was something I could do about it. My trying to send her a message via the PatriciaRosemoor account is what started requests for my Primary Password. One a minute after I cancelled the last one. I tried the two passwords I knew I had, but neither worked. I got a request for a new password so I did that and it didn't work either. I kept going back to it all day yesterday uselessly. I found directions of what to do online, but it didn't match up with my Settings information. Please, if you can tell me how to fix this, I would be grateful. Or, if I can keep the thousands of emails I probably have, I could try deleting the account and recreating the account. The problem would be how to bring all my saved emails back. Thank you for your help. Patricia

Open 14

Thunderbird will not download yahoo emails

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 seco… (read more)

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?

Open 13 99

When I installed a newer version of Thunderbird I lost all my email Addresses

I updated t the latest version of Thunderbird but since then none of my email addresses were changed with the update. Tried all the advice on line but still can't retriev… (read more)

I updated t the latest version of Thunderbird but since then none of my email addresses were changed with the update. Tried all the advice on line but still can't retrieve my saved email addresses from the inbox and sent box

Open 13

Lost all saved email data

A few days ago I lost all of my saved email messages, plus "sent" emails, and "deleted" emails. I had important information stored there for future use. I am hoping to … (read more)

A few days ago I lost all of my saved email messages, plus "sent" emails, and "deleted" emails. I had important information stored there for future use. I am hoping to be able to retrieve it. Any help would be appreciated. Thank you!

Open 13 1 209

Stop downloading archived gmails to thunderbird POP

Hi, I use thunderbird as both POP and IMAP through gmail. I keep all my emails on my POP thunderbird desktop client. I use IMAP on my thunderbird laptop client, iPhone, i… (read more)

Hi, I use thunderbird as both POP and IMAP through gmail. I keep all my emails on my POP thunderbird desktop client. I use IMAP on my thunderbird laptop client, iPhone, iPad via Apple mail when remote, then download the emails to my desktop.

What I want to do is read emails and set them to archive on my IMA laptop, iPhone, iPad. I know Gmail tags the archived emails. How do I stop thunderbird from downloading the archived emails to my POP thunderbird desktop client?

Thanks! Art

Open 13 10

as soon as i open anything in an email in thunderbird i get a new tab and it takes me out of my email account when i delete this opening

All of a sudden every time I open something in an email it automatically creates a new tab. When I delete what I have open it takes me out of my email account and I have… (read more)

All of a sudden every time I open something in an email it automatically creates a new tab. When I delete what I have open it takes me out of my email account and I have to delete the tab to get back to my remaining emails. I have changed nothing so I am confused as to why it has recently changed.

Open 13 10

My THUNDERBIRD email settings (in particular my inbox filters) are not working

I have used Apple Mail, GMail and Outlook; i am hoping that Thunderbird will achieve (relative) zero inbox. My objective is to create an inbox that observes established r… (read more)

I have used Apple Mail, GMail and Outlook; i am hoping that Thunderbird will achieve (relative) zero inbox.

My objective is to create an inbox that observes established rules/filters and directs my emails into the appropriate folders. I was hoping that Thunderbird would achieve this objectives but I have so far been unsuccessful.

I would be happy to screenshare with an appropriate technician in order to resolve this issue as its becoming increasingly frustrating.

Open 12 30

All my emails are gone, local folders and even starred messages - oldest msgs are 26/03/2026

I will preface this with no I do not have a backup - which is my fault. However I did not expect my account to be nuked into oblivion with no explanation. As per the titl… (read more)

I will preface this with no I do not have a backup - which is my fault. However I did not expect my account to be nuked into oblivion with no explanation.

As per the title, all my emails are gone. My local folders are devoid of anything I can use and am hoping that everything may be on a server somewhere. This is years of emails, important correspondence, bank information, business, etc. The ONLY thing I can think of is when I download the TB app for android and sync'd it using the QR on the desktop version of thunderbird. I then checked stuff the next day and everything was gone barring emails from that day, all folders, everything was gone. Is there no way to recover this?

Open 12 80