Thunderbird Community Forum

When I send an email with my HTML file signature Thunderbird appends a text signature as well. The text signature is not visible in the draft email, and is not in the settings. The text signature is added for separate identity with no signature enabled. I want to stop this. Any ideas please?

I've received the following message the last few days when I send an email with Thunderbird:

Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. (I am sure neither of those errors apply.)

It then gave me the option to "save" (I didn't get the exact wording before I clicked on "save") and I don't see it anywhere. This was a very important email and I need to find it.

I have three separate Yahoo email accounts. I set up Thunderbird to link to each Yahoo email account separately. It worked fine for a year or more. On 5/25/26 one of the three Thunderbird email accounts stopped downloading emails from Yahoo. I could see at the bottom bar Thunderbird indicating that is was downloading 1 of XX emails, but never actually downloads them. There is no error message. I checked the Yahoo email account to verify the number of emails I am missing from Thunderbird and the number is correct. I can see the emails in Yahoo. I'm the only person using Thunderbird, so no changes have been made to previous settings for retrieval. I confirmed Security and server settings for Thunderbird in and out going emails, and Yahoo are correct. I tested the connection in Thunderbird, and the connection is successful. I tried to send an email from the Thunderbird account having issues, and the email was sent and received by the recipient. The recipient replied, and Yahoo received the email, but failed to download it to Thunderbird...along with all the other emails since 5/25/26. I unlinked the account and reestablished the link between Yahoo and Thunderbird, and still not fixed. I tried restarting the computer, with no change. I tried to send an email from Thunderbird to one of the other Thunderbird emails and it was sent and received. I made changes to Thunderbird to force the download of emails, and it still wouldn't do it. I turned off my antivirus, closed Thunderbird, and restarted it, and that didn't change anything. The capacity of emails on the email in question only has 739 emails, so it's not over the limit and I have plenty of storage capacity. Thunderbird is set to save emails, Cookies and cache were cleared, no change. I ran the folder repair feature in Thunderbird, but there was no change. I compared all the settings between the other Thunderbird emails that are working against the one that isn't, and they are all the same. There was a suggestion to close out of Thunderbird and delete the "Global-message-db.sqite" file from the Thunderbird profile in case it was corrupted, and it would recreate this file when Thunderbird was restarted. The file was recreated, but it didn't fix the problem. There was mention that a suspicious email in Yahoo might be blocked by Thunderbird, so I placed various emails in the spam folder, and it didn't work. I did find one email in the Yahoo spam folder that was dated before 5/25/26 and moved it to the Yahoo inbox. Lo and behold, that one email downloaded to Thunderbird. So there is something within Thunderbird preventing emails from downloading after 5/25/26. I've read many people complain about similar download failures with no solid fix. Someone mentioned it fixed itself on a day, but then stopped again days later. Someone else mentioned Yahoo changed its password protocol to transfer emails, but that doesn't make sense since the other two are still downloading based on the "old" password protocol. I'm at wits' end. Thanks for reading all of this. I hope someone has a solution.

I like the new support for Outlook. Thank you very much. This was the first year that I did not spend >16 hours rebuilding accounts each January. It is also nice that this support automatically transfered incoming emails to the Local Inbox.

Just recently, Spectrum Internet dropped POP3 support and I was able to setup IMAP.

Gee, It would be nice if there was just one more checkbox in the Account Setup which would automatically transfer IMAP messages to the Local Inbox.

Can this be added to the wish list?

When Mozilla was started this morning it came up with a page to donate. When I try to go around it to get to my email folders that show I have new email, I cannot. I have tried restarting the computer and the same thing still happens. How can I get past this to see my emails?

Byron

I open Thunderbird and click on get messages and emails are not coming into Thunderbird from AT&T. It worked perfectly yesterday but today we are encountering this issue. There was no changes to the application since yesterday. Thunderbird is online I clicked the icon at the bottom it shows when it is offline. I contacted AT&T and they said things were working on their side. What are possible things I can do to fix this issue

My eMail has worked fine for many years - until this morning.

 When I first tried to "get messages", I got a response, "connection to inbound.att.net server reset".
 I restarted Thunderbird, and then the computer (Windows 11), and when I tried again, I got, ""inbound.att.net (POP) .. certificate revoked".
 I can login to my ATT webmail, but I can't download eMail to my computer via Thunderbird.

... In my attempt to upload this question, I looked for the TB Version, but it said to update Thunderbird. I did so, not it is back to telling me "connection...reset"

 Please help!

Earlier today I was able to access my AT&T email using Thunderbird. I have several email addresses & they worked. But later on I could not download any AT&T email. Interesting that my gmail address still works with TB.

I tried a few things - An AT&T address can send to the gmail address & the gmail does receive it. The gmail can send to an AT&T address. The gmail indicates it was sent, but the AT&T address never receives it.

It seems to be an AT&T problem so I went to the AT&T site & deleted the Secure Mail Key an created a new one. Did this on just one address. It can still send to the gmail address, however it still cannot receive anything.

When trying to receive any AT&T email, at the bottom of the screen it displays my address & “Connected to inbound.att .net”. That would seem to indicate I'm connected but just cannot get my email.

And suggestions on how to get TB working with AT&T email? Thanks.

I have lost mt SEND button when I want to send emails to others. This has resulted some time ago and is most inconvenient when replying to email's. How do I get it back?

Good day,

I have a site that I use for my Tia Chi Walking classes and lately I'm not receiving any communications from them. I've reported the issue to their support team and they responded with this error they've received when they try to send an email to me from the site: https://esmerise.com

smtp; 421 4.4.1 Unable to connect to remote host | 421 | TransientCommunicationFailure

The email address that I use is from my ISP Spectrum.net, however I use Thunderbird to sync all my emails. I contacted Spectrum support and they are not seeing this error, all emails appear to be coming through with them.

Please advise if anyone has experienced this issue and if so, how was it resolved.

Thank you Billie

Everything has been working normally for years until today. I cant retrieve emails from ATT servers and the only message is "Host contacted sending login information". It hangs for 30 seconds and then nothing... No error message is displayed. I read a similar post and tried following the back and forth, but didnt find any solution. What I have tried: -Copied an old backup copy of a profile into the default. -Checked the server settings and tried the option of using a password instead of OAUTH2. -Created a new profile and set it as the default.

Each time I had to restore the profile by copying a recent profile backup into the default

No luck with any of these steps.

Hi, I'm using Thunderbird for Yahoo Emails since many years (it's great!).

In March/April 2026 I changed the Server Settings (authent. method) to OAuth2, it has worked properly.

But since 23.9.2026 I cannot receive Emails in Thunderbird any more (only for the Yahoo account, I have another Email Account working properly in Thunderbird). Bottom text is "Message 1 of 33 will be downloaded", but nothing is downloaded after severals minutes.

My Yahoo Account in the Firefox Browser works properly, its ONLY Thunderbird (and probably OAuth2?). I have removed my Oauth2 Password in saved password of Thunderbird and generated a new one, but that does not help.

So if this issue cannot be solved, I will use another Email Program instead of Thunderbird!

Kind regards Soenke

I accidentally deleted a good number of my emails from my local Pop3 server account. I don't delete my emails from my gmail server so I can just redownload all my emails but cannot remember the prefix needed to do it.

If I recall correctly I go under settings for my email account, then go to server settings and add the prefix to my email shown in the Username field under the Pop Mail Server Section.

Can anyone remind me of the prefix?

It was like restore:[my email] or all:[my email].

I should have made a note of it as I cannot find it anywhere online now.

Hi!

Trying to add new account on latest Thunderbird instillation, added information/configuration what I use on another computer and in the end it says: Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nslOService.newURI]

Checked 10x for typing errors and it says same error. These account settings works great on previous versions wihtout Account Hub

How can I solve this?

Best regards,

Hello everyone,

Environment: Thunderbird 155.0 Windows 11 Pro, Surfshark VPN and Bitdefender Total Yahoo.ca POP3 account transaction@notice.aliexpress.com promotion@aliexpress.com

The Symptoms: Thunderbird stopped downloading emails from my yahoo.ca account with the message "Downloading message 1 of xx" where xx was increasing from one day to the next.

What I Have Tried: I disabled the antivirus and VPN without any result. I deleted the file global-messages-db.sqlite without any result. I entered the web interface in my yahoo.ca account and I saw that after the last message downloaded in Thunderbird there was a message from <transaction@notice.aliexpress.com>. I deleted the message from <transaction@notice.aliexpress.com>, restarted thunderbird and it started downloading messages until the next email from <transaction@notice.aliexpress.com>. I repeated the procedure several times with the same results: Thunderbird downloads any message except messages from <transaction@notice.aliexpress.com>. Other messages from aliexpress.com (e.g. promotion@aliexpress.com) were downloaded without any problems. The message download is blocked only when an email from <transaction@notice.aliexpress.com> is reached.

I searched for solutions on the internet but I didn't find anything.

I am not able to send emails the last couple days. Any ideas on how to fix this? My incoming mail works fine, but when I try to send and email, reply or forward, it will not send.

Thanks!