Komunitné fórum Thunderbird

I use thunderbird on my PC and stated to use it on android, but was very disturbed to find that an email I can see on the default email app on my phone is not showing up at all on thunderbird, neither on Android nor on my PC. What else might I be missing? How to fix this?

Howard Mittleman Hrmitt@gmail.com

Hello,

I recently created a personal Outlook.com account and configured it in Mozilla Thunderbird on Windows 11.

What works:

• Receiving emails via IMAP in Thunderbird.
• Sending and receiving emails through Outlook.com webmail.
• Microsoft OAuth2 authorization completes successfully.

What fails:

Sending emails from Thunderbird consistently fails with an SMTP authentication error.

SMTP configuration:

Server: smtp-mail.outlook.com Port: 587 Connection security: STARTTLS Authentication: OAuth2 Username: user@outlook.com (anonymized)

Exact error from Thunderbird's Error Console:

535 Authentication unsuccessful, SmtpClientAuthentication is disabled for the Mailbox.

Followed by:

Error during AUTH XOAUTH2, sending empty response

500 Unrecognized command 'Length: 7'

Troubleshooting already performed: Verified all IMAP and SMTP settings. Enabled two-step verification on my Microsoft account. Confirmed that the SMTP username matches my Microsoft account's primary alias. Deleted and renewed the stored OAuth2 credentials. Tested both smtp-mail.outlook.com and smtp.office365.com. Temporarily disabled Bitdefender's Thunderbird extension. Confirmed that Thunderbird accepts Microsoft authentication cookies.

None of these steps resolved the issue.

Microsoft Support declined to investigate SMTP AUTH availability for my mailbox and referred me to Mozilla.

I found similar reports, including Mozilla Bugzilla issue #2071567.

Could you confirm whether this is a known limitation affecting newly created Outlook.com accounts and whether a workaround or fix is available?

Thank you.

As a secondary consequence of having re-created my default profile earlier today, my accounts were reorderd. My left pane now contains at top level:

default IMAP account Local Folders news account news account other IMAP account

I want `other IMAP account` to be second in the list, above Local Folders. Dragging and dropping does nothing in my Thunderbird (macOS; TB 153.7.0esr). Can I reorder by editing the profile's `folderCache.json` and/or `folderTree.json`?

Upon opening the macOS application, Server Settings "When I delete a message:" on my primary email account appears as shown in the image. If I don't change the dropdown to select Trash, deleted messages disappear as if the "Remove it immediately" radio button were on.

I have my Mac set to open Thunderbird at startup; after (infrequent) rebooting I haven't remembered to change the dropdown menu setting until I go looking in vain in Trash for a recently-deleted message that I want to review.

Docs say that Trash is the default, and another IMAP email account retains the "Trash" folder setting across Thunderbird restarts, so I believe that it being forgotten for my primary account is a bug or corruption symptom.

This issue has been present for some unknown number of versions through the current one.

Thunderbird version 160.0 64 bit will not create a new folder.

Go through the steps like I have for years to create a folder and it goes through all the menus with no error but when I check my folders it is not created.

Very weird software.

I have Windows 11. I've used Thunderbird for many years. My PC recently stopped working. The Geek Squad reported that the OS was corrupted. They reinstalled the OS and the computer now works. But now I have a problem with Thunderbird (and several other apps).

When I try to start Tbird, I get an error "Thunderbird is already running, but is not responding. The old Thunderbird process must be closed to open a new window."

Based on info I found in prior community messages, I opened task manager and ended the Tbird task. I then searched all of my drives and deleted all instances of parent.lock that had anything to do with Tbird or Firefox.

When I then try to start Tbird, I get the same error.

I am out of ideas on how I can get Tbird to open.

I have tried uninstalling and reinstalling Tbird, but that didn't solve the problem either.

Any ideas or suggestions? Thanks.

Getting this error

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: Cannot connect to SMTP server 47.43.26.4 (47.43.26.4:587), connect error 10060.

Hi I have been asked to download the new Thunderbird. I have a fear that will delete all my old information that I have stored on the old system. Also will the new system be easy to use as the old was? I am not a techie.

For three days now, my Thunderbird desktop app has not been receiving any email on any of my accounts. At first, I thought it was due to the Microsoft outrage but I know Microsoft was fully restored early this morning but I'm still having issues logging on even though I have changed my password and it's still not working.

I've been using Thunderbird happily for many years, but a couple of days ago, it started making problems. It sometimes shows only my mail address, but no folders, so I cannot get to my mails. Sometimes it shows only the folder for incoming mails, but no "sent". Or "sent" ist empty. Sometimes everything works. (I have a second mailaddress in this thunderbird app, for which all folders are present, no problems there)

I've been using Thunderbird for about 15 years. Just started it up this morning to check my mail and it updated itself to version 160.0 (64 bit) code name Meadow. All seemed fine until I tried to search my messages and noticed that the interface was completely changed as compared to what it used to look like. No matter, I entered a search filter (Subject contains USPS) and clicked on the Search button. Nothing happened. No indication of progress, no results, nothing. What's more significant is that it returned no hits when searching my Inbox, even though that mailbox contains about 50 messages with USPS in the Subject line.

So ... what happened to the Search Messages function?

Hobie

It happened yesterday some time. System backup from last week is fine, everything shows, so it's not something in the emails themselves and not hardware. Is something broken or did I accidentally change some setting?

Hi everyone,

I have been using a OTENET (Cosmote, Greece) e-mail account (apel50@otenet.gr) in Thunderbird on a laptop for years. But since a couple of weeks I have a problem with outgoing mail. No changes in configuration.

=> Incoming mail: Works still perfectly via POP3 (mail.otenet.gr, port 995, SSL/TLS).

=> Outgoing mail: Consistently fails on mailgate.otenet.gr. Tested on port 465 with SSL/TLS and port 587 with STARTTLS, as well as via different network connections/hotspots, and just to be sure also on smtp.otenet.gr. The following error:

"Verzenden van het bericht is mislukt. Er is een fout opgetreden bij het verzenden van e-mail. De mailserver antwoordde: Reject, id=18742-18 - SPAM. Controleer het bericht en probeer het opnieuw."

I have already contacted Cosmote support, and they verified that the account status is completely fine and that smtp.otenet.gr is indeed the correct and active outgoing server. Even a simple, plain-text test email with a normal sentence gets rejected immediately by their server-side filter (amavisd / SpamAssassin).

Could this be related to a specific header, authentication method, or sender-identity mismatch in Thunderbird when communicating with modern Telekom/Cosmote SMTP infrastructure? Any advice on what to check would be greatly appreciated!

Warm regards, Anna