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Att made me change my account password. Now Thunderbird cannot access messages. I have entered the new password in out going and incoming but there seems to be more to this than that because nothing happens. Where do I have to put in new passwords? Thanks so much. Marjorie

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)

Hello, I'm using the most recent version of Thunderbird on a desktop using Windows 11. Just this morning (Aug 11), all incoming email to all my four accounts are coming in with no subject or correspondents showing and when opened the email is not formatted in HTML, just plain text and lots of code. I have tried several fixes with no success: repair folders, turn off all add-ons and anti-virus protection, uninstalled and reinstalled software. Can you help, please? Thanks!

why just today is all my incoming emails coming to trasha nd not my in box in Thunderbird worked fine in the morning but i am not getting any mail in my in box it is all going to trash

To my new computer Thunderbird has just fetched the INBOX-mails from the IMAP-server, not my many subfolders, not the SENT-folder, not the SPAM-folder. This has previously worked when I changed to a new computer. How do I get Thunderbird to transfer these mails.

hi all today thunderbird stopped downloading messages from the mail server

a manual d/load doesn`t do anything

the mail is backed up on the server & i can`t get a d/load to happen ( manual or auto)

how to auto- clear the server so i don`t keep getting maibox full messages or is this the inbox on my computer that the message refers to

i keep deleting the junk files

I can not send out emails from Thunderbird. I get the following message "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) mail.xxxx.ca timed out. Try again." I have not been able to find an answer to this problem. I hope you can help. Please note I am a Senior so please be patient with me. Thanks, Al

The Reply command no longer shows when I want to send an email back to the person that sent it. There is a note at the bottom of the email that says: A unique identity matching the From address was not found. The message will be sent using the current From field and setting from identity Vince Hunter < omni232@telus.net> Can you give me instructions in laymans terms to fix this bug and return it back to the way it was?

When setting up Thunderbird, I did not see the radio tick box for removing mail from the server. What will happen now that I have removed about 10000 pieces of email from my local account on my computer's hard drive?

I have more questions, but would rather ask one at a time.

One minute I'm able to send emails. The next -- not. Spectrum SMTP server: mail.twc.com port 25 SSL/TLS normal PW "Sender rejected AUP#Out-1500"

Spectrum support is completely useless as usual.

This just started happening today. The last message to come through normally was today (August 11) at 10:20 AM EST. Every other message today after that time came through as described in the subject of this post.

I am running Windows 10 Pro version 22H2 fully updated through the July 2025 updates. The Thunderbird version is 141.0 (64-bit). No new Thunderbird add-ons have been installed.

The columns for Subject and Correspondents are there, but they are blank for all my messages after 10:20 AM. The message body is like I said—it looks like I selected View|Message Source. I have both of my email accounts for Optimum and Gmail on Thunderbird. Optimum is POP and Gmail is IMAP. The Gmail message that I received a few minutes ago looks normal. The messages accessed on my Optimum webmail account look fine as well so it looks to me to be a Thunderbird issue.

I have tried the following:

1. Repaired the Inbox folder within Thunderbird.

2. Restarted Thunderbird in Safe Mode.

3. Exited Thunderbird, deleting the global-messages-db.sqlite file in my profile folder and restarting Thunderbird.

4. Exited Thunderbird, deleting the Inbox.msf file in my profile folder and restarting Thunderbird.

5. Reviewed all the Thunderbird settings—they looked OK.

6. Rebooted my computer.

7. Uninstalled Thunderbird via Control Panel|Programs and Features, then downloaded and installed the current version of Thunderbird from the official website.

I have uploaded a screenshot of what my Thunderbird screen currently looks like.

Thanks for any help.

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

All, recently set up email accounts and all was well. Used TB years ago & liked it for its ease. Now my signature is not working (set up with 'attach signature from a file instead' option FYI). Tried everything I can think of, disable add ons in troubleshoot mode etc. deleing & re-adding it. No new add ons have been added before this happened, they were added prior to setting up signature. And worked fine initially. Thoughts and please keep it simple for someone very old lol - pic attached for help perhaps?

TIA and appreciated

Have always set up accounts so they download all messages to hard drive.

Since 3/27/25, it is as if it never officially logs the downloads as downloaded, so it downloads each day as if it hasn't been done since 3/27/25, marking all of the messages since then as new.

File is very large so want to try fixing without deleting entire file.

Tried the 'repair this folder' but that didn't work.

Having trouble identifying the exact folder on the hard drive to delete since there are several different accounts in the Thunderbird setup.

I just installed Thunderbird on a second computer and I'm having serious issues with my email. The install recognized me without having to log in with my password. However almost all the emails are missing with the exception of one folder called Trash. There is nothing in the inbox and no sub-folders are showing. I logged out and then reopened Thunderbird and again it opened without asking for my password. It's very strange and alarming quite frankly. Everything worked quite well on the first computer so what gives with fiasco? Unless somebody comes up with a solid answer and fixes this, it will be the last time I use Thunderbird. Patrick

Thunderbird can receive emails but I cannot send them. I get the error message per the screenshot below concerning SMTP.

I have a MacBook Air with Mac OS Sequoia 15.7.2. The error started yesterday (21 November). Just finished conversing with Optus support and they say that it's not at their end: webmail works okay, can receive email and send it (will note there was a brief hiccough earlier today when could not send from webmail, but okay now). All settings as recommended (port for incoming server actually different from what Optus recommends, but when I changed it from 995 to 110, Thunderbird stopped being able to download emails, so changed it back again. Port for outgoing is as recommended, 25.) I tried lowering security, as suggested by Thunderbird help list, and no change so restored it.

I have the latest version of Thunderbird for Mac, 145.0.

My partner, who also uses Thunderbird, cannot send emails either. He has an older Mac running an older OS.

I have included two images, the second one showing details of selected server. When I clicked 'fetch certificate' it failed. Does that signify anything important?

The error console shows a lot of information, which of course I cannot understand, but can screenshot some of it if that would help.

No firewall, no virus protection, no VPN.

Any ideas as to what might be going on?

My Sent folder disappeared. How do I restore the folder with the sent messages still intact. Or, at the least, just restore an empty Sent folder. The In-Box, Drafts, and Trash are still there.

All the settings are correct, and it seems that because there's no Sent folder I cannot send an email. When I try to send a message I get the attached Error.

My local phone company routes email through Yahoo Mail, then to Thunderbird. It was all working fine until my Sent folder disappeared. Now because of the missing Sent folder I have to create the email message in Thunderbird saving it in Drafts so I have a record. Then, I have to copy it and send it from Yahoo Mail. Needless to say this is a pain in the you know what.

Can someone please provide the instructions to get my Sent folder back?

Thanks,

Tess

I have made 3 attempts to add a thunderbird account to receive email from an old verizon.net account server. All have failed.

All three times, I got the message.

     "Unable to login at server. Probably wrong configuration"

which is a remarkably ambiguous error message. It takes about 10 minutes for that message to appear.

I am able to log directly/independently into what I understand is the verizon server. But obviously I am doing something wrong.

Independently, I successfully added a thunderbird account for an outlook.com.

I will skip the verizon account for the time being. I have one other account to move the Thunderbird.

I successfully moved all three to Mac mail a few weeks ago, only to discover that I really don't like it for a variety of reasons, the most significant for me was that

     - I learned about IMAP
     -  I couldn't delete messages, although IMAP on a mac creates the 

illusion that I could.

There is nothing quite like seeing messages that I know have deleted, reappear marked as unread, right before my eyes.

Thoughts anyone?

-m