Thunderbird Community Forum

I have several Yahoo accounts set up in Thunderbird, but I get this frequent (several times a day) error notification from just one:

"The current operation on 'Inbox' did not succeed. The mail server for account Yahoo (xxxxxxx) responded: p."

I'm sure this is a truncation of the complete error message. How can I see the complete message?

There seems to be no consequence of the "error" - everything appears to work as normal. It's just annoying.

Reinstall of Thunderbird after a few years easy with all my old (sub) folders captured from service provider. However, neither delete folder (via any option) nor create folder is acted upon. Also ignored is attempt to rename a folder. Inbox contains over 23 000 messages but none after 5 December 2025. Deleting hundreds permanently on provider has no effect on Thunderbird. Some folders are empty but but are labelled as containing hundreds of messages.

Trying to send a message results in error, 'Could not detect login form.' But I am logged in.

Any pointers to unclogging system gratefully received. Chris Oldman

Thunderbird version number: 148.0.1 Mail provider: Yahoo Client OS: Windows 10

The issue and steps I tried to resolve: On 1 Jan 2026 I switched from Outlook client on my Windows 10 PC to Thunderbird 146.0.1. I did not import any user data from Outlook but started with a clean install of TB for the new year. I use yahoo.com with POP3 as my email provider. Server Settings: Server Name "pop.mail.yahoo.com", port 995, SSL/TLS, OAuth2 Outgoing Server: Server Name "smtp.mail.yahoo.com", port 465, SSL/TLS, OAuth2

it all worked fine and I was very happy with the setup. Then from early to mid-February I was unable to use my computer. When I finally accessed Thunderbird again, it connected to Yahoo and showed that approximately 800 email messages would be downloaded and started downloading them. After downloading about 100 messages, Thunderbird timed out and I haven't been able to get it to work since.

I have read and followed or tried to follow these articles plus others that I may have forgotten about (not listed in any particular order) - OAuth2 Authentication for Yahoo, AOL and ATT | Thunderbird Help - including all the steps in Please check the following before asking for support - POP access settings and instructions for Yahoo Mail | Yahoo Help - Automatic Account Configuration | Thunderbird Help - Manual Account Configuration | Thunderbird Help - Thunderbird and Yahoo | Thunderbird Help - Send and receive messages in Thunderbird | Thunderbird Help - Can no longer get emails | Thunderbird Support Forum | Mozilla Support - Emails suddenly stopped downloading to Thunderbird 140.2.1esr | Thunderbird Support Forum - Get Messages | Thunderbird Support Forum | Mozilla Support - Cannot receive messages | Thunderbird Help - Problem with Thunderbird working with Yahoo Mail acccounts. | Thunderbird Support Forum

I have removed all messages from the Yahoo inbox and tried to find one or more messages that may be affecting the download. I don't know the best way to determine that.

I use Windows Defender for my antivirus. I don't see anything in Defender that blocks or scans email messages which would prevent downloads, although I could be wrong about that. if this might be the issue, please provide some guidance about how to check Defender.

I have uninstalled and re-installed Thunderbird. In the process I downloaded the setup file for Thunderbird Setup 148.0 and installed that version. It later auto-updated to 148.0.1. Before installation, I removed all external connections from my Yahoo account and completely removed Thunderbird from my PC, including the profile and profile.ini. When I reinstall and switch the account to POP3, Thunderbird captures the App password from Yahoo and connects just fine. But it still times out while attempting the first download of a message. The first several times it timed out, an error message was displayed but now it doesn't show anything. Except no messages are downloaded.

At this point, I don't know what else to try. Since I don't have much experience with Thunderbird, I don't know how to troubleshoot the process (logs to look at, etc.). I don't want to go back to Outlook but I need the email client to work and download messages. Any help would be much appreciated.

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.

Thunderbird stopped receiving new messages on 02/09/26. I've tried all the help solutions several times and still nothing. I am at a loss. I can send emails, but have to go to virginmedia to see new messages.

I've been using Thunderbird on Windows 10 since last year sometime. Currently I'm on version 151.0.1.

I've 4 x mailboxes here and since yesterday, 3 of them show me an unusual message when checking for emails. I tried attaching a screenshot but although the screenshot uploaded, I couldn't find a way to insert it here. But the message says Unable to write the email to the mailbox and asks me to check if I've write privileges (which I have) and to cheek the available disk space.(currently 101GB free).

The message is happening 2 or 3 times each day and lasts for about half an hour, then everything works fine again. Has anyone else seen this??

My husband (DG) is 88 and beginning to have severe memory & analysis problems. I recently tried for three days, using his computer, to set up an account for him on the Social Security site, that I could oversee. It accepted a password, but kept asking for a 'backup code' that supposedly was 'assigned' - so I would have a second method to verify the account. There was no way, on that web page, that I could request a 'backup code' or ask for the '10 backup codes' that were supposedly given automatically. I wanted to simply get a letter that explained his SSA eligibility, so we could apply for Senior housing. I was able to call SSA and request the letter - but it will take 14 days by mail. We need it now - and I should have been able to simply download a PDF eligibility letter to print out. In less than 5 minutes, I was able to request and download an eligibility letter for myself on MY SSA account - but could not do it through his SSA account. I need to be able to communicate with SSA (& other agencies) and receive their replies through an email "AccountForDG@centuryxxxxx.net" that I can read in my email account "CuriousQuestor@centuryxxxxx.net). How do I set this up? Thanks in advance.

After your upgrade I was unable to send messages. The incoming I was able to fix but the outgoing I could not fix. I have included the email message sent to me and I have included a picture of the outgoing STMP,

Since Aug. 20 I have been having trouble sending and receiving msgs. (on two email addresses) at Thunderbird when it interfaces with Charter Spectrum. Have sent many msgs. to Thunderbird here and also in close contact with Spectrum. Will this be fixed? thank you.

no access to email through Thunderbird since aug. 20th. Spotty. Use spectrum and they seem not to be interfacing with Thunderbird. Will this end? Know we are not the only ones.

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?

Hi. i have an IMAP account. I like to have my inbox in threaded view, so i know if i replied to my customers and to easily view the order of the emails. This causes a problem because i also like to have every sent email in the "SENT" folder, which made me use the Copy Sent to Current PWE, and it works like i want now.

But something happened after i have been using this extension (even though it happened only once): the same person answered to a chain of emails, which was already organized has thread, the sendedr is the same and the subject is exaclty the same, but the email was placed on my INBOX but OUTSIDE the thread.

Why did this happened and how can i force that message inside the thread again?

Thanks you

Since 26 August I have not received any emails! I am able to go to my browser & see all my emails so I think fault must be with Thunderbird!

Help please..