Thunderbird Community Forum

in all the years i've used thunderbird (am now on 64 bit version 144.0.1 on windows 11 25h2) the notification counter has never worked correctly

i can be sent an email & thunderbird notifies me there's 1 new email / unread message on the taskbar + tray icon

if i'm busy & ignore it / leave it thunderbird keeps on checking & incrementing that counter

when i actually download the new emails, there is still only 1 & not the number thunderbird has counted too

crazy!

I cannot send emails and always get the same error message, no matter what steps I have taken. This has been the situation for nearly 48 hours. During this time I have undertaken the following steps, as advised by Thunderbird (TB)/ Optus and Google (not in order).

Checked SMTP server settings (many times), Re-booted the Router, Uninstalled and reinstalled TB, Changed the number of Server Connections to Cache from 5, down to 1 (as suggested by the TB Notification), Tried sending a test message to my other email address on several occasions, but got the same error message. I have checked my Webmail account and can send and receive from and to my email accounts from within webmail.

As required in the TB help file, The following information is provided: SMTP settings (attached). Mail Provider is Optusnet. ISP is Firefox. Antivirus is Trend Micro Maximum Security Version 17.9. OS (details attached).

If I have neglected any required info please ask. Any assistance would be greatly appreciated.

Thank you. Flin

I must be doing something wrong. I am new to thunderbird, migrated from Eudora since I can't send mail with Eudora anymore.

I tried to configure Thunderbird as much as possible like Eudora, but ... it doesn't receive nor send mail. On the surface it looks fine, it seems thunderbird logs into the server, it seems it sends mail and checks for new mail, only I don't receive anything, nor send anything even though it looks it does. So what am I doing (or is going) wrong? (I can still receive mail with Eudora and today I checked and received 54 mails, none with Thunderbird)

Two nights ago I uninstalled ExpressVPN from my system at the instruction of one of their "support" people. My computer immediately lost the ability to access half of the websites I tried to visit and Thunderbird wouldn't send or receive email. I rebooted and that fixed every issue, but since then, Thunderbird no longer checks for new messages for any of my accounts. If I manually instruct it to check, it downloads the messages with no problem. I don't use any add-ons, and I'm using the latest version on a Windows 11 PC. I have already tried deleting global-messages-db.sqlite, repairing each mail folder from within Thunderbird, clearing the cache, and running an install of the latest version. I have also tried changing the setting for each mail folder to alter the interval for message checks by a minute just to see if that would jog it, but no luck. I've looked at various other help threads for this and am out of ideas. Thanks in advance for any help.

My Thunderbird mail, which has been set up as POP until now, started giving this message yesterday morning: "The connection to the server mail.munkebo-borger.dk was reset." After that, it no longer downloaded any mail from the server. I have now switched Thunderbird to IMAP, and everything works fine since then. But what is the reason that it will no longer run POP, which it has done for several years? Best regards Tommy Jeppesen

Thunderbird was sending and receiving just fine until a couple hours ago. Now, I cannot send anything to anyone - including my email provider. The message is: "Outgoing server (SMTP) error. The server responded: (C18) RBL restriction: Blacklisted by Internal Reputation Service" I verified all the settings (though I changed nothing prior to the problem) and all is correct. I've checked with tech' support and they verified that my address does not have a Blacklist. I've restarted the program and restarted the computer. I've also donated several times to Thunderbird. Before I change clients, I thought I'd see if anyone had a fix for this. Thanks, D

I want to block a sender. The advice on line is to right click the email and create a filter. When I right click the list that appears has no option to create a filter.

How do I block an email, please?

I have been using Thunderbird to access my comcast emails. I never had a problem with it. However, this afternoon, just out of the blue Thunderbird cannot download my emails, the following message popped up: "Login to server mail.comcast.net with username xxxxxxx failed." Then Thunderbird asks for a new password. When I enter the still correct password, it displays the same error message. I did not change anything in the settings before this error message popped up. I tried ChatGPT to get some answers, but whatever I changed it had no effect. I am attaching a screenshot of the server settings (I have of course removed my username). I would be grateful for any advice as to how to fix the issue. Thanking you.

I just went through hell trying to figure out why I could not send emails on my comcast.net account when I had to reinstall TB.

Here's what worked for me:

https://support.mozilla.org/en-US/questions/1548207

Hi there,

I need to export my thunderbird account over to outlook.com. I'm hoping to just sign into outlook.com and add my current thunderbird email details for j.childs@mhslimited.net.

When trying to add this as a POP or IMAP I get an authentication error once applying the incoming/outgoing server and port details.

Can you please help with what details I need to do the above.

Thanks

Everything was working fine then one of the email addresses stopped working. I tried everything and finally deleted that mail box but still can’t access the emails via thunderird. Help

Hello,

My Thunderbird 128.12.0esr (64-bit) was working fine. It no longer displays any messages except the latest ones. They are filtered, they disappear into their folders, I can only see them directly on the email server. I also have version 140.3.0esr (64-bit), but it asks me to create my accounts from scratch. (Mozilla Thunderbird Flatpak en-USthunderbird-flatpak - 1.0 release notes).

Thanks for your help!

Xubuntu (Ubuntu 22.04.5 LTS) Thunderbird 128.12.0esr (64 bits) Firefox 128.12.0esr (64 bits) Zotero version 7.0.11 (64-bit) LibreOffice 24.2.5.2 (X86_64)