Thunderbird Community Forum

I have saved relevant e mails to local folders in my Thunderbird account on my Applemac. I opened up Thunderbird on my MacBook and downloaded my Thunderbird account but it did not copy those local folders, merely 1 empty folder. Without these also shown in my Thunderbird account when I am away from home, I cannot see those records. I am struggling to find a solution. Are you able to help please? Alan Dowler

It appears how TB handles IMAP connections for outlook email accounts no longer works - OAuth2 connection flow broken, and this is likely due to stricter changes made on Microsoft's backend that is impacting connections going forward.

I have multiple email accounts configured and recently, I have been bombarded by login pop up - likely related to the OAuth2 authentic process.

Whilst I was able to circumvent the authentication process - i.e. not completing the flow process entirely as it expected, newly created outlook accounts appear to reveal two things:

1] There has been a recent change to the authentication process - i.e. the telling sign.

2] There is a now deeper issue when trying to connect outlook email accounts. It seems the reason why circumvention was possible with existing accounts was because they have already passed the OAuth2 process correctly - correct tokens exist. Since this won't be the case for new outlook accounts - no OAuth IMAP access token created, above error is given.

It seems the likely cause is because Thunderbird holds or requests a token that does not contain the correct IMAP audience/scope combination, and Exchange rejects it during SASL XOAUTH2 bind.

For your information, I am using the latest versions and able to configure Apple Mail client - which uses Exchange protocol (not IMAP), without issues.

I can't send emails from my Thunderbird account. I am however receiving them. Using IMAP. All server settings appear to be correct. Error message reads " Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.stackmail.com timed out. Try again." What's going wrong?

I just opened a Startmail account---works great--but no subfolders are showing up on Thunderbird...not sure how to make that happen--always worked seamlessly with gmail.

I have been using Thunderbird for over 10 years (currently version 152.0 (64-bit) on Windows 11). For the past few months, I have intermittently been receiving duplicate emails. What could be causing this issue, and what are the possible solutions?

very recently perhaps with a McAfee or Thunderbird update , I am seeing a message that McAfee stops a threat every time thunderbird does a message retrieval. see attachments. I have checked my outlook account directly and deleted a bunch of messages but it persists.

I currently have two email accounts in Thunderbird (both from Virgin), and want to add a further one (from Hotmail). The new account is up and working, but I've only been partially successful in adding it to Thunderbird. I followed the procedure given in the Support Article "Automatic Account Configuration" and this worked up to a point, but it failed at Step 4 (or possibly 5). Thunderbird seems to be able to recognise the new account and add it to the on-screen list, but It claims that it can't find any messages, although I know that there are at least 10 in its Inbox on Outlook. Furthermore, although my other two accouts have subfolders such as "Inbox, Drafts, Spam, Sent, etc." the only subfolder that appears in the new account is "Inbox", which remains stubbornly empty!

I'm attaching two screenshots. The first one shows my Firefox screen with the three accounts and their subfolders (collapsed for "richardandmaya@ntlworld.com") in the left hand column. The new one is the one named "ailuros2@hotmail.com". The second screenshot shows the new account seen via its native Outlook, which shows all the messages that I know are there but which Thunderbird can't see.

Strangly, I seem to be able to send messages from the new account to other accounts.

Any suggestions?

Trying to send e-mails and get the following message:-

Sending of the message failed. An error occurred while sending mail. The server responded: <X@totalise.co.uk>recipiant rejected - relay denied. Please check the message recipient"rod.coleman@totalise.co.uk" and try again.

This happens with all e-mails.

(PII redacted by moderator)

"connection to server pop.mail.yahoo.com timed out" I have been getting this message in the activity manager for about a week now. When I click get messages, it says down loading message 1 of 1, but nothing happens.

I am unable to send email from Thunderbird. I've checked the SMTP settings and reset the email password. I am able to use the provider's web based email client to send. The ISP and email domain are both ptd.net (PennTeleData). It's running Windows 11 and the only security on the machine is Windows Security. I turned security off but that did not help. The Thunderbird is v. 140.7.1esr (64 bit).

I have a number of pop3 accounts with the same mail host, but suddenly one of them gives me the message "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 use Thunderbird on two Windows machines, and the problem is on both, so it is something in the interaction with the server, however, there is no problem accessing the mail via webmail directly on the server.

I have tried to change password on the account, but the problem did not go away. In fact, I got the box to tell me that the old password did no longer work, so I know that the problem pops up after log in to the account. Before the error message appears, the message "downloading 208 messages" (or something similar) briefly appears.

Is there a way to find out exactly what fails?

This morning, I repeatedly received an "Authentication failed when connecting to outlook.office365.com" error. I removed the Outlook account from Thunderbird hoping to solve this by reconnecting and starting from scratch. Upon entering my email and password, my configuration is successfully located in the Mozilla database, but upon selecting the IMAP configuration and after a brief password check, I received the error message "Unable to log in at server. Probably wrong configuration, username or password". Is this an issue on Outlook's end, or is something not set up properly?