Thunderbird Community Forum

I have been using Thunderbird with two POP3 Hotmail accounts for some time and I am trying to set up a third account with exactly the same configuration. However, both the automatic and the manual configurations failed. The new account receives mail, but the outgoing smtp server config seems to have a problem. Sending messages times out or keeps prompting for a new password.

The Hotmail account has POP3 and IMAP enabled. Thunderbird is set to receive all cookies. I cleared history and cache after every attempt and also temporarily disabled the firewall.

Any suggestions about what the problem could be?

Hello

I just recently purchased a new SSL certificate for our domain from bluehost. Now I get the following error message from Thunderbird.

Configuration not trusted. We received the configuration for your email over a connection that isn't as secure as we'd like. This means there is a tiny chance that someone could have altered it. Double check provided configuration.

I entered my server dashboard and compared the manual email settings and the settings match exactly.

I have paused anti-virus software on both my mobile and laptop and have uninstalled and reinstalled Thunderbird but nothing helped. Contacted Bluehost all is working fine. I can access my email from other clients but not from Thunderbird.

Any thoughts thanks

Gary K.

Attempting to set up a yahoo email in thunderbird 140.9.0esr(64-bit). The goal is to have this set up on multiple workstations, so I've made the adjustments recommended per this article: https://support.mozilla.org/en-US/kb/thunderbird-and-yahoo#w_please-check-the-following-before-asking-for-support

So, the toggle for mailnews.oauth.usePrivateBrowser is set to true, site/third-party cookies are always allowed (no exceptions), and the authentication method is set to OAuth2. Using the recommended server settings for yahoo: imap.mail.yahoo.com : 993 smtp.mail.yahoo.com : 465

I am able to set up the initial OAuth. The window pops up, I log in using the account password then put in the texted code, then the window closes and I get an email confirming the login. Hitting done within Thunderbird after this has it check the password again, and it fails: "Unable to log in at server. Probably wrong configuration, username or password."

This is on a fresh Windows 11 install/fresh Thunderbird install.

In my work account on a Microsoft Exchange server, we have public keys for all users in LDAP. Sometimes an encrypted email message from a known user fails to decrypt, instead showing a panel with no menu: "Thunderbird cannot decrypt this message". Errors are sporadic: for a few senders, all messages fail to decrypt on my Thunderbird, while for a few other senders, all messages successfully decrypt. For most senders, it seems to randomly depend on the particular message. In one odd case, a chain of replies can be successfully decrypted up to a point, and from there on, all replies fail to decrypt for me. We've looked into all the settings, and we've tried variations where someone sends me an encrypted message without signature, then another with encryption and signature. Nothing seems to consistently cause or avoid the error, it just seems to happen randomly.

Can someone recommend a way to diagnose the problem, for example debug logs?

It would also be helpful to try manually decrypting the raw received message using openssl. Is it possible to find it somewhere in the `~/.thunderbird/` area?

I have been using Thunderbird for ages now with no problem, but I suddenly realised that no recent emails were appearing from my Gmail account. I have tried everything suggested on line to resolve the problem, including uninstalling and reinstalling Thunderbird, and deleting and re-entering my acccount details but neither the IMAP or SMTP servers will connect to Gmail. I have reset all of the server settings on Thunderbird, and have checked that Gmail is IMAP compliant (which, apparently, is is now automatically). I have spent hours trying to sort this out and am just at the point of abandoning Thunderbird completely, but I am loathe to do so if there is a solution. The latest error message i have received is "Unable to log in at server. Probably wrong configuration, username or password" but I don't know what else I can check or change.

Whenever I try to search my various emails for some text, at least 40% of the time it shows me the attached message. I'm on Version 149.0.1 but it's been happening ever since I installed Thunderbird (maybe 4 or 5 months ago?) My first move is to check that I haven't mis-spelled the word I'm looking for (which I usually haven't) and I definitely know that the word is valid for one or more emails. So why does this message keep appearing?

Previously I'd been running an old 32-bit version of Thunderbird (which I don't have installed any more) but I don't remember ever seeing this with the older version.

Thunderbird stopped syncing with my GMX email accounts (I have several) a couple of days ago. It keeps reporting that the attempted connection has timed out. I haven't changed any settings on either Thunderbird nor GMX. Any idea why and how to fix it?

I reinstalled Thunderbird and since then I can't log in to my gmail accounts, there is a link to the account but it doesn't open a window for me to enter the password, I've tried everything possible but nothing helps

Hello,

In my thunderbird application (149.0.1 version windows 11) in the main window (where i see all emails), the column RECIPIENT shows the CC recipient instead of the TO recipient

So for example, if someone send me and email and add a CC, at the recipient column i see the CC email and not mine.

Is this a bug or this is how it suppose to work? Is there a way i can change it?

Email (from gmail) is not downloading. Thunderbird updated yesterday and I can't download today's emails; it gets stuck on "check mail server capabilities." If I go into Gmail it's there, but it's not coming in on Thunderbird

I can't send out my reply emails or on new ones b/c I mistakenly deleted the 'sent' option at the top. Actually all the options at the top are gone, including 'forward' etc. This is b/c I clicked with the R mouse on 2 choices there, (which I can't remember what they were called). I did this b/c the 'sent' word had gone gray and I was trying to fix the situation. My emails stopped going in the sent folder and turned up in drafts. I tried sending them from there but it came up with no send option too. Then I finally found 4 emails I was trying to send out in the 'outbox' which I never use! Eventually the computer asked if I wanted the unsent to be sent and it did work then. But I very much would like the former usual configuration to come back please for sending out emails. This is my request here. Interestingly some that went in the drafts were incomplete and did not include all my words! Strange. This is all on my Windows 11 desktop which I prefer to use. Interestingly also, my cell phone suddenly won't recognize my usual long time email address! So I can't forward photos off my cell phone to my Thunderbird (gmail) inbox now. This happened a few days ago, before today's problem. When I try, it says my email address in invalid!! And yet it is receiving the emails on gmail on the phone. But it also wouldn't let me send or even open up 'drafts' on the phone. Emails are arriving in my T-bird inbox all right on my desktop. 'T-bird is the default client on start-up'. On my desktop, my Bitdefender says my computer is 'safe' so there does not appear to be a problem there.

I have just installed latest ver of Thunderbird onto HP Z_Book Win 11 Pro as way to locally save an archive 20 years of email data when Yahoo reduces acct storage to 15gig like Google. All server settings and all folder settings including local folder are st to don't delete anything. However, Thunderbird deleted 20 years of emails from inbox and folders on Yahoo Imap Server without saving to local folders or Thunderbird folders, completely defeating the whole procedure and leaving me with 20 years of record lost. Why??? What went wrong??. I have to prevent this from happening again!!! Every local Thunderbird folder is set to not delete anything as are the IMAP Acct settings in Thunderbird???

Hello, and thanks for the read...

ISSUE: Every day I have to call the telecom ROGERS that took over for telecom SHAW, turn IMAP and Pop3 on 9 Email accounts (they lost 1). Sometimes the 1 to 2 hors chat w/ a human turned it back on will not last long.

DETAILS:

1. I can receive outside Emails *because I can't send using Shaw/Rogers, checking for Email, just hangs at trying to login in to any of the 9/10 emails.
2. When I can get a support person to check, they tell me that IMAP and POP3 are turned off.
3. They will tell me they re-enabled it. But it doesn't enable for me.
4. It all works OK when using the online webmail Zimbra. However, I need to check 3 of the 9 email accounts every hour, others every 6 hours, and others once a day at boot.

QUESTION: When using POP3, does the setting on my SMTP need a special setting on Thunderbird?.

NOTE: I am complying with "Rogers With Shaw" passing the buck to the Email Client (Thunderbird) by asking here - "Could It Be The Email Client'! And my answer is 'No', because Thunderbird works perfectly with 54 other Email accounts.

Thank for reading this, and for any input you may add, ~r

P.S., I'd like to see a upgrade to this input form that allows us to Preview out Post And, when I started this Post, it alerady had a image from a previous Post

The arrow is tiny and hard for me to see (as well as the vertical bar for selecting text). In other programs it is quite large. I have the LXQt cursor size set to 60. How can I increase the size for TB? How can I make it invert color so as to have good contrast always?

I have created daily tasks to remind me to do certain things. When I dismiss these in the reminder dialog box, they are colored Red in the Task Pane but not complete, and thus they remain in the Task Pane. Is there away to delete these Red task in mass, i.e., highlighting them and deleting them? Or is there a better way to dismiss them when they pop up so they disappear?

Thank you,

Hi I have successfully linked my TB Calendar to Nextcloud. However, Tasks are not syncing.

When I go to create a task in the shared calendar TB advises: Please select a calendar that supports tasks

I understand later versions of TB now handle CAL and CARD Dav better.

Some have suggested using TBSync addon, however that appears to only support account creation for Google and MS calendars, but not Nextcloud.

Is there a setting in TB or NextCloud I am missing, or an addon ???

Any thoughts appreciated. Thanks

On 6th Feb 2026 a professional set up Thunderbird [149 I think] on my Desk top computer, running Windows 10, with 2 email addresses. Last week I found I could receive emails on both, but not send on either. I know the passwords for both the addresses, but even if I put them in when asked, I still could not send. Then I found I was not receiving e mails on either address as well. I am 87 and may have changed something important, in an effort to find a solution, as last Friday [27th March] thunderbird crashed. I sent the report to thunderbird. Yesterday I received the previous day's emails and current ones. Today [29th] I am receiving, but not able to send again, My email default is set as Thunderbird. For many years I was with Plusnet, but recently I had to transfer to Greenby. I checked their Web mail when I was not receiving emails and they were on their Server. I can make simple changes in Account Settings eg Port, Outgoing Server, Security.. Is there a simple solution or should I call the Professional again? Thank you.

I store many e.mails in a variety of Folders. Most are viewable but at least one folder (ATTIVO) says there are no e.mails despite having just saved them there. These e.mails are visible via my i-phone. As I have passwords etc saved on my lap-top this issue is problematical but not fatal but does indicate a glitch in Thunderbird that makes me suspect it's general reliability

When I select Thunderbird email it responds very slow. When I select a message, the message does not show up. My email is carolinascene.com and my hosting company is AIT. Advance Internet Technology. What can I do? Call me because I do not get email. [edited phone# from public community support forum] anytime. Thanks! Gerald Robinson I have donated and will again!!