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I got a message: "Authentication failure while connecting to server outlook.office.com." Please assist in getting this resolved.

Thanks

My Thunderbird Account was updated by TB on 2 September. Since then all of my new emails go to Trash. Although I've tried the various responses to such questions, I've been unable to change the problem and get my new emails to come into my Inbox. I'd very much like your assistance please. Thank you.

Logged into Thunderbird this morning. On current version. Noticed that the local trash folder had emails in it. I have not changed any of the multiple account setting. Send some test emails fro 2 accounts and they ended up in the local folder trash. What has happened. I want this redirection to stop. What other demons have been created by the current update. HOW CAN i fix this problem?

All of the incoming messages are going to Trash. This includes messages I have not indicated as trash. I get no new messages to my inbox. Started today, 09/04/2026.

Hi!

Trying to add new account on latest Thunderbird instillation, added information/configuration what I use on another computer and in the end it says: Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nslOService.newURI]

Checked 10x for typing errors and it says same error. These account settings works great on previous versions wihtout Account Hub

How can I solve this?

Best regards,

I have created folders that I want specific emails to be put in when they arrive. But I don't know where to create these rules. Creating the folders is easy but how do I create a rule that tells Thunderbird which folder to put emails from specific people/businesses etc

I get this message when I try to send emails Sending of message failed. An error occurred while sending mail. The mail server responded: mf-505: Sender Policy - Relay Denied. Please verify that your email address is correct in your account settings and try again. How to I find out this information

I regularly get the following message when attempting to send an email :- "Sending of the message failed. The message was not sent due to exceeding the allowed number of recipients. The server responded: Policy-SC01 You’ve reached your sending limit. Don’t worry, you can send again soon.." This message implies that I am attempting to send a message with multiple recipients, BUT it only happens when I am sending to only ONE recipient. Why is this, and how do I eliminate this very annoying restriction. I currently cannot send an email because this problem is preventing me from doing so. Thunderbird has been a useful email client for many years, but these frustrations are not helping me to remain with Firebird. Regards, PD

I'm new to the community and don't really know how things work, so maybe this is the wrong place for this. I had a seemingly catastrophic problem after updating yesterday. All of the emails sitting in my inbox disappeared, and were gone from the yahoo server as well. Long story short, I figured out what happened. In my filter rules I sometimes had a blank entry at the end of the list. Previously that had been ignored, but after the update it is now treated as a match. So the first filter that had a blank in it caused everything in my inbox to be moved to a certain folder in my Local Folders. Obviously, it would be legitimate to not allow blank entries in the filters, but once you've allowed it, you really shouldn't make a change. In the end the solution was simple, but it wasted a fair portion of my day figuring it out.

I have a large number of filters, and an important email was processed to move message into a folder. but the filter had no rule that would apply to the message. all the filter criteria were based on the sender, but that email did not have that sender. the filter log shows the filter being applied anyway. I suspect the filter database is corrupted. How can I fix that? i noticed my version is slightly out of date, and I will update it, but I dont expect that would fix a corrupted filter database .

All my new incoming e-mails are ending up in the trash instead the inbox. This happens since about a week. I have to move all e-mails from the trash to the inbox. There are no active filters, so what is the problem? Also the layout has suddenly changed. Please help.

Inbound emails are going to Trash instead of Inbox.

No changes have been made. How can I check settings to find a solution? I see nothing related to this issue. Thanks for any help.

For some reason all my emails contained in the inbox keep moving to the trash box by themselves. I have to manually move them back to the inbox. This includes read and unread messages. anyone know how to stop this? V 152.0 64 bit.

I receive emails, but can`t send any, there`s the note: Sending the message failed. An error occurred while sending the message. Mail server response: SPF ERROR - see page / SPF Error: Please see http://www.openspf.org/Why?id=kubtrans.justyna%40o2.pl&ip=83.30.162.147&receiver=smtp.wp.pl. If you are a poczta.wp.pl user, check the SMTP authorization. / If you are a poczta.wp.pl user, check the SMTP configuration: http://poczta.wp.pl/autoryzacja/. Please verify that the email address is correct in the account configuration and try again.

How can I fix it?

will not download -- "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox"

I have two email accounts (one is imap, one is pop3) in my older version of Thunderbird. They have both worked normally until last week. The pop3 account continues functioning normally, but now when I select (in Thunderbird) the imap account, the mouse cursor starts showing the hourglass and the bottom status bar reads "loading message" . I've closed and restarted Thunderbird, but this doesn't make any difference. The imap account is stuck on "loading message" and doesn't download anything. I also checked my imap email account on the ISP's website, there is new email there waiting to be downloaded,. What can I do to troubleshoot this?

ps...a few weeks before this problem surfaced, I had all my email (inThunderbird) disappear, so I renamed the prefs.js file and that fixed the problem. My email worked normally after that, until this current problem occured.