Thunderbird Community Forum

Hi, I'm tring to rearrange the order of my email accounts in the left hand pane. The FAQ says sandwich icon -> account settings -> move them around in the desired order. This looks OK in the account settings list when I do that, but when I close it, the accounts order is as before, and this order shows up again when I re-open the account settings list. Is there any way to make this "stick"? Do I need to click some hidden Confirm button? Many thanks in advance!

Hi all

First time user here, so forgive me if I do or ask something stupid!

I'm the old fashioned kind of user, so I like to have some kind of manual to read through at my leisure, thus saving me from asking daft questions on forums like this.

I have found something at Floss, but it seems to be in a large number of sections which I guess I could doenload individually but it seems a considerable effort.

Can anyone suggest where I could download such a manual? I'm not bothered too much if it relates to an older version of Thunderbird, I just want to have a handy reference to the program in general.

Thanks in advance for any responses.

Mike Boardman

I just set up a gmail account in T-bird. I can send, but I can't receive. It keeps saying there's no email to get. I use a read-only email app called Mailwasher. I AM getting Gmail email in that app, while it's on the server.

I have gone through the settings in T-bird several times. I even checked on the web. - I entered what you see below (in both Thunderbird and Mailwasher): '"Incoming Mail Server Settings (IMAP) Hostname: imap.gmail.com Port: 993 Requires SSL: Yes Username: Your full Gmail address (e.g., example@gmail.com) Password: Your Gmail password"

I even tried changing the password a couple of times (also had to do this in Mailwasher).

UPDATE: now Thunderbird isn't logging on and wants a new password (which I've done twice already). No reason why.

PLEASE ADVISE. Kami

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.

Title: CardBook 104.7 folder pane frozen ~40 minutes at every startup - TB 140.8.1 ESR - Linux Mint 22.3

Environment: - Thunderbird: 140.8.1 ESR 64-bit - CardBook addon: 104.7 - OS: Linux Mint 22.3 Cinnamon 64-bit - Fresh install of both Thunderbird and CardBook - 3 Gmail IMAP accounts - 5 CardBook address books, all local FILE type (.vcf files in /home/nesko/cardbook/), no CardDAV or remote server involved. Largest address book has approximately 1500 contacts.

Symptom: At every cold startup, the CardBook folder pane (address book list) is completely frozen and unresponsive for approximately 40 minutes. Thunderbird itself starts quickly and all email accounts and other addons function correctly. Only the CardBook folder pane is affected. After approximately 40 minutes CardBook becomes responsive without any user intervention.

Error console output at startup consistently shows: - TypeError: can't access property "addEventListener", currentWindow is null (implementation.js:28:13) - TypeError: can't access property "document", currentWindow is null (implementation.js:567:15) - CardBookXULNotifyListener.js:599:13 - Content process is not responsive while sending DevToolsProcessParent:watchTargets

Additional observations: - On one startup, 8 duplicate CardBook tabs appeared simultaneously when TB's content process finally became responsive, suggesting CardBook was retrying initialization multiple times while waiting for TB's window - Running TB in Troubleshoot Mode (all addons disabled) confirms TB itself is healthy and starts quickly - The errors reference CardBook's own initialization code (CardBookXULNotifyListener.js) attempting to access Thunderbird's window (currentWindow) before it is fully ready - TB's content process unresponsive message appears during the same startup window

Steps taken so far: - Unchecked "Keep messages in all folders" in Synchronization & Storage for all 3 IMAP accounts — this improved overall TB startup time - Unchecked "Run synchronization at Thunderbird startup" in CardBook Preferences → Sync — this reduced the CardBook freeze from over 1 hour to approximately 40 minutes - Reported to CardBook developer at cardbook.thunderbird@gmail.com

Question for TB support: Is there a known issue with TB 140 ESR's content process initialization timing that could cause addons to fire before TB's window is fully ready? The currentWindow is null errors suggest CardBook is initializing at a point where TB's window object does not yet exist. Is there a TB-side fix or workaround for this timing issue?

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 been using Thunderbird for a fairly long time and have several email accounts in it. Today, I noticed that one of my accounts seems to be filtering the messages for one type of message. When I login to the email account directly, I see all of the messages. I don't have any filters set - none of the filter buttons are on, there is no filter in the filter text box and there are no filters in Tools->Message Filters.

ThB & cPanel filters (a) don't catch all SPAM and (b) send legitimate mail to the Junk folder. Together, the 2 problems cause a large amount of work. Because of (b), I must regularly go through the Junk folder. Because of (a), the Junk folder contains a huge number of messages. (a) Messages from serial spammers trying to spoof Costco, Marriott, AAA, Blue Cross, etc. that I have flagged as SPAM dozens of times IN ALL THEIR VARIATIONS, still appear both in the Junk folder and in the Inbox (including messages with the red SPAM marker turned on, which to remove from the Inbox I must first click to mark them as non-S{AM, then click again to mark them as SPAM). (b) Messages from senders who have sent hundreds of messages before that have gotten through and who are in my contacts list regularly and in significant numbers end up in the Junk folder. I tried to set up filters in Spam Assassin. They made no difference. I tried to set up e-mail filters in cPanel, which entirely removed messages before they even reached ThB. These were quite effective, but although I created them very carefully using regex to capture every variation of COSTCO spelled with Os and 9s, etc., they also ended up removing legitimate messages (and none of my senders mentions AAA or BlueCross in their messages). I really have no clue how to proceed. None of the advice that AI or ISP support provided helped. Thank you for taking the time.

Thunderbird causes my machine to 'hang' from time to time, often for up to a second and usually a number of times in quick succession on each ocasion. Sometimes this happens frequently - say every 5 or 10 minutes - sometimes only after an hour or more since the past occurrance. My machine hangs completely - nothing will work, mouse, keyboard, sound, other apps etc. If I happen to be typing (into any app - including Thunderbird - when this happens, input ceases, the cursor freezes and - if the problem persists for a second or two, Windows reports "[app] is not responding" I cannot be certain, but I believe the problem occurs whilst messages are being retrieved.

This is a very serious problem as it means that I can never leave TB running as the problems it causes are not acceptable. This means I cannot deal with incoming messages without periodically re-starting TB - which is an utter PIA.

I am running Win 11 Professional on a 2-year old machine with 64 Gb of memory. I have run TB in Troubleshoot mode, I have confirmed that the problem occurs regardless or whatever other apps are running (or none) and I have proven conclusively that no other app causes any kind of similar problem.

Looking forward yto hearing if others have had the same issue and what can be done about it.

Thunderbird version 148.0.1 will not send outbound emails since updated to OAuth2. Error message is Unable to Authentic Outgoing server (SMTP) Email account will allow inbound mail , but will not send mail. Have worked through all published troubleshooting steps. Extremely frustrating!

Hello.

I just installed thunderbird for the first time and i really liked it but there is a problem some of my emails particularly from from Fiverr don't show Fiverr logo at the top within the email maybe that logo has linked wrapped in it on which i can click and it take me directly to my fiverr profile. These are official emails from fiverr. What i have tried: I tried every possible solution that i can get on internet. Show Remote content turning on and off, Turing Simplified view on and off. Turning of the Proxy from auto detect and Turning the DNS off. Fiddling around view settings. Changing settings in Configuration like mailnews.message_display.disable_remote_image, browser.opaqueResponseBlocking.javascriptValidator, browser.opaqueResponseBlocking, etc. But it didn't load the logo image and keep showing broken image place holder. This is also the case with my bank mail, my bank email sometime have an image with warning about OTPs not just text it also don't load. I also tried disabling the spam protection and i only use minimize to tray extension which i disabled to check if image loads or not ans tried to run it in Troubleshoot mode but no luck. I will really appreciate If anyone could help me and fixed the issue . :)

Thanks.

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?

I can't seem to get Thunderbird on Linux Mint to work. Everything font related is a mess. I don't know what default Thunderbird uses when it doesn't know a font but the setting is unreadable. I've messed with a ton of font settings but nothing seems to change anything. Note if I copy the garbage and paste it into a notepad, it is totally readable but there appears to be no way to change this default in Thunderbird. Please help.

I’ve tried all versions of Thunderbird on my 2020 M1 Mac, and even though I log in correctly, it doesn’t load emails from my account. I used to use Thunderbird normally because I needed it, but I haven’t used it for two months, and now I see that it doesn’t work when I try to connect to my email. It connects to my email normally, but the problem is that when I click on “Inbox,” there's nothing there, and when I click “Fetch Mail” to try loading it again, a message pops up at the bottom saying everything is fine, but in the end, I still don't have those emails. What kind of error is this?