Thunderbird Community Forum

Whenever I get an email that says they are including an attachment, the attachment is never there. What is going on and how to I get email attachments. Any help is appreciated.

Thank you

When I open the Thunderbird desktop app we receive this popup error message:

"Unable to establish TLS connection to POP3 server. The server may be down or may be incorrectly configured. Please verify the correct configuration in the Server Settings for your mail server in the Account Settings window and try again."

I have not found any configuration under the account settings to help with this, but if anyone has any suggestions to walk me through this to establish a connection again that would be most appreciated.

Additionally, when I try to send an email I receive the message: "Login to server smtp.cybermesa.com with username centinela failed."

After closing the error message box I received another error message: "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.cybermesa.com timed out. Try again."

Is our issue then with Cybermesa and not Thunderbird? Or Is something wrong with Thunderbird due to our initial error message we received? Any suggestions is much appreciated.

For many years, I have used Thunderbird and have made a signature in HTML, with clear pathways to loctions where images are stored. Never had a problem. Here is my successful code:

🧡Mark Robbins🧡
ALLTEXASMEDIA
alltexasmedia@gmail.com
Award-Winning Social Media Marketing Services, Website Design, Logo and Brochure Design, Video Recording and Editing, AI-Based SEO to Attract Customers Daily

https://link.v1ce.co.uk/aaa3x6/611733

Namely, that my antivirus program quarantined the entire inbox file upon detecting malware embedded in a single message.

So I encourage people who encounter this issue to explore that as a potential cause.

Thanks to those who responded for the help and patience.

I am using Thunderbird 115.5.2 (64-bit) on an older iMac on OS 10.12. I have four email address accounts, all gmail, and using POP. I have stored emails I wanted to keep in sub folders in Local Folders. This has all worked well for years.

Yesterday I lost lost all content from some of the subfolders in Local Folders, while some retained some content and a few seem intact. I also lost most emails that had arrived in the inboxes in the last week. The folder pane still shows the accounts, with their own set of folders. As usual, the inbox folders are highlighted with the number of new emails downloaded from the Gmail server to each address, but I can not see them in the message pane, or find them anywhere else. I sent a test message from one of my addresses to another – It didn't show as sent in Thunderbird, but did go through the gmail server and the message count of downloaded messages on the recipient address went up by one, but I couldn't see the email. Then I tried clicking on the folder "properties" then 'Repair Folder' but nothing happened, although the information on that window showed the number of messages and MB that I would expect to be in that folder, rather than what was there, which presumably means they may still be in there somewhere? I would be very grateful for help – I'm not tech savvy and feeling completely lost.

I have spent 3 hours trying to figure this out. Nothing works for me.

Authentication always fails yet when I log into Outlook it always works.

I turned off using the new hub and was able to setup my email account but it told me OWL was not active (or something about OWL).

Godaddy is my provider.

What am I not doing correctly?

Incoming mail (txt only; no html) is getting more and more unreadable the last weeks. It looks like in the attached screenshot. I am desperate. What can be the cause of this?

At the same time there are problems with outgoing mail. Characters like 9 or : do not appear on screen although I typed them. When I copy the text to another program, these characters do show. Very annoying. Hope there is a solution to be found somewhere!

Best, Mike

Dzień dobry, mam problem z wiadomościami przeniesionymi do folderu lokalnego umieszczonego na serwerze firmowym. W folderach widoczne są tylko tematy, natomiast po kliknięciu w wiadomość jej treść jest niewidoczna.

Wiadomość po przeniesieniu do głównego folderu odebrane jest ponownie widoczna.

Co może być przyczyną?

I am trying to upgrade from ESR to Release. I saved my profile successfully, went to the install page and clicked Download. Got a request to donate, which I did. Then I got a page saying Thank you, Finish installing and enjoy Thunderbird. But there is no way to finish installing and I never got a download file. I've tried multiple times, nothing happens. Help!

Hello,

I had been using Thunderbird as my email App for very long time. About a few years ago I stopped using it, due to some annoying errors.

I installed the new version a few days ago, however I am some issues:

1. I want to change the default email composing font type and font color. I made changes in the setting and config editor as well. When I start creating an email the font type and color shown is correct. However, as soon as I start typing the default takes over.

2. I have about 50, 000 emails, which I keep for references (ATT-Yahoo). Every evening all the messages disappear, except for about 2000. Then, in the mornings, I have to restart the app and it starts to download "AGAIN". Please advise.

Surendra

I have several email accounts that don't work well for me. Since Firefox has been my primary browser for over twenty years, I turned to Mozilla. I like your company's open source method and people-based philosophy. So I signed up for Thunderbird just now from your website. But I am not all that tech - savvy (I'm a baby boomer who started using personal computers at age 34 in 1984, and internet in 1990.) I'm 76 years old.

Is there someone who could walk me through setting up my new Thunderbird email account, and then moving my emails and address book from my current email server on Rackspace? And also disconnecting Apple Mail as my default outgoing mailbox, and set up my new Thunderbird account in its place?

I'm willing to pay for some help!

Three days ago my email stopped displaying the contents normally. This is an example of what is displayed:

View in Browser <https://m251k6d7.r.us-west-2.awstrack.me/L0/https: %2F%2Fnotifications.spectrum.net%2Fv2%2F7653dbh8-914b-49e3- be46-3485432704ac-6fbcc229-1aff-472f-9d60-30d142f28bc0/1/0101019a92a6f846-7a7a6a44-ed3f-4919-9e07-7fb9f874272d-000000/FQOZxe1pRaghhBS9ePfM5pAm3RI=453> Spectrum Community Solutions

the instructions are in blue. Thanks for any help.

Hi Guys, please help to fix a very strange problem, that more and more Emails don't match up with the Sender and show different Message content (see attached Screen Shots) Never happened before ... why now ?? Thanks in advance, Werner P.S. my Thunderbird Version is 128.9.1est (64-bit) and my iMac is on Sequoia 15.5

I am having an issue with retrieving my email in Thunderbird. On laptop, using Version 140.2.0esr | Released August 19, 2025. No changes were made to Thunderbird settings. The email is showing up in the Comcast portal, but for now having it forwared to a Gmail account. Tried changing password in Comcast (and in Thuderbird) to no effect. Tried deleting my Comcast email account in Thunderbird and re-adding it, but no change. Can send out email fine, just receiving it is the issue.

Interestingly, I use BlueMail on my phone and it, too, has the same issue and will not retrieve from Comcast. Thanks in advance!

My Tags window & folder [View, Folders, Tags] layout stopped properly displaying all my items with the appropriate "tag" set in the past few updates to T'bird. I recently switched to version 140.4.0esr but the problem existed before that in 140.2.1 as well. Is there any way to force a "rebuild" of the Tags window so that all my tagged items show in their appropriate categories, with appropriate statuses [read/unread, etc]? Otherwise, the Tag feature is no longer useful.

bold textA little while ago, all of the messages coming into my Thunderbird app, do not expand graphics etc in the email. I just get strings of code and web stuff.. I cannot find the setting in my Thunderbird that will cause it to automatically translate all of these codes. Help please !

Hello; Windows 10 & current version of Thunderbird. I am trying to add Messages Filters to filter out spam (getting more and more of that!) but the "OK" button on the add message filter is below the bottom of the screen. The window cannot be raised or resized to make the button visible. Photo below. Moving window does not allow me to raise window above top of screen. Keyboard (Alt-Enter) / Move will not work. Changed windows screen size just makes window larger but button still below bottom of screen.

Non-functional work around. Highlight Message name. Press Shift-Tab TWICE. Press ENTER. UGLY!

Tech since DOS 3.0

Thank you for your time and attention.