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Hello,

While working today, I used TB normally to send and receive mail.

Today I wanted to forward one mail to a supervisor. After i click forward, the window appears. I add the receiver, and when i want to type in a text, I can't. Nothing happens. It doesn't matter what I do; it won't write anything i type. I can't even insert copied text; I can't change anything, like the forwarded text in the mail is locked.

I have various mail accounts set up in my Thunderbird. All of them used to work just fine until yesterday. Since yesterday I receive an error for one of them that "Login to server ... with user ... fails." I have a second account with the same mail provider which works just fine with the same configuration settings. The account in question used to work just fine for several years without any changes. I tried saving the account data, deleted it from Thunderbird and set it up again - no success. Same error message. Connecting to the mail account via browser with the same credentials works alright. At the moment I'm at a complete loss what could be the problem - anyone having some brilliant idea?

All recommended settings by the internet provider are correct but e-mails can not be sent using Thunderbird. I contacted the internet provider and they say that from their side everything is o.k. and that I must seek assistance from Mozilla as chosen e-mail client. Can you help please. Thank you, Zoran

i havent used thunderbird in some time as i usually just use the app on my phone. when i opened it last week a error message kept popping up asking me to input my password for my email server (shaw) , and it kept saying the password was wrong. i reset it on my server and tried again. same problem. i got frustrated and left it. now i opened thunderbird today and i dont get an error message but it is still not syncing to retrieve messages and i cannot send messages either

i checked all the settings and they seem correct. my husband's account is still fine.

is there a fix or do i give up?

i have local folders with contents i need access to, is there a way to move them somewhere so i can access them from my gmail account instead?

Why if you save 2 drafts does the second save wipe out the first? Why is the spell checker used in Write so patchy and disjointed? Why is the select text- cut copy paste- so useless in amending mail?

Why does it somtimes eat emails - they just disapperar.? Why is the share function so limited - docx-

Alan

Thunderbird downloaded 610 emails from Yahoo then stopped in the same day. I've checked the https://support.mozilla.org/pt-PT/kb/thunderbird-e-yahoo#w_por-favor-verifique-o-seguinte-antes-de-pedir-suporte before and it's all like the page asks...

Can you help me further

Thank you

Thunderbird stopped downloading email in July 2026 on the same day an update was pushed. The problem showed up after an update to TB on 27 July 2026. The weird thing is that we have another account and it has no problem with that TB account downloading. I even moved the profile to another laptop. Yesterday it downloaded 25 of approximately 300 messages and stopped. I had a lengthy tech support call with Yahoo and they concluded the problem was Thunderbird. I've re-installed and updated the program. I've gone through multiple App passwords in an attempt to re-connect. The outgoing mail works. The web based Yahoo mail works. It's not an antivirus or firewall problem. I even archived most of the Yahoo mail from the web and tried to see if I could download messages if there were fewer of them. Even 10 or less would not download.

We have it set up as a POP3 account. The hard drive on the laptop in question has only 10% of its capacity filled. I accidentally removed the other account and had to set it up again yesterday using the exact same steps and it works without issues.
 Does anyone have any suggestions as to what I might try next?

Since about November 2025, all the mails I try to sent to @sfr.fr addresses (different recipients) fail and I get the following message: Sending of the message failed. An error occurred while sending mail. The mail server responded: <xxx.xxxx@sfr.fr> recipient domain rejected (blacklisted by local policy).

Please check the message recipient "xxx.xxxx@sfr.fr" and try again

I did not have this problem before. If I use Greenby's web mail (My email provider ), the messages are sent without any problem. I would very much appreciate some help to solve this problem! P.Y: pemy@pemyoung.plus.com

My normal inbox is a blue envelope at the very top of the left hand list. Recently, another inbox, a yellow folder further down, has appeared. It has a Trash above it. There are emails in it. There is nothing in the top Trash. My incoming emails seem to jump between these two. Also some emails seem to be disappearing. This is not ideal, and didn't used to happen.

Thunderbird has stopped receiving or sending email. I just tried to send a message and received the following error message: "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.gmail.com timed out. Try again." This has been a problem for several days. Potentially since the last update. Please help. Thank you.

Goedendag, Ben zelf nieuw in Thunderbird. Ik heb diverse mailaccounts en ik zie een Verzamelmap staan met daarin ondermeer de Concepten en Verzonden mails. Deze zie ik liever per account weergegeven worden, kan dat?

Ik gebruik IMAP op al mijn accounts, na het instellen zie ik per account wel al mijn ontvangen mails staan, maar niet de verzonden mails? Ik denk dat dit inherent is aan mijn vraag, maar hoe kan ik dat dus oplossen?

Tot slot zie ik Mail-conversaties staan van berichten en hun antwoorden, maar dat wil ik helemaal niet. Ik wil gewoon alle berichten op datum & tijd gesorteerd zien staan. Hoe krijg ik er die conversaties uit?

Dank voor alle hulp alvast!

Groet, Pico

How do I configure my thunderbird client to send e mail using my gmail account. Gmail's "solutions" do not seem to work - see attached for what they claim. I have used both ports 465 and 587 and the appropriate connection security.

my new message page doesn't now have a box -top left -to restore edited/ corrected lines of script. When editing wholelines of script, even whole lines have diappeared. and couldn't be found, and not in draft. Advice would be very welcome. Thanks. Mike

Hello,

I am having an issue with Thunderbird automatically marking new emails as read.

When a new email arrives, it initially appears as unread in Thunderbird, but after a short time it automatically changes to read, even though I have not opened or clicked on the email.

I use Thunderbird on two computers – a desktop computer at the office and a laptop when working from home. The problem started after I installed and configured Thunderbird with the same email account on my laptop.

I have already disabled the “Automatically mark messages as read” option in Thunderbird. I have also repaired/reindexed the Inbox folder, but the problem remains.

The email account is configured using IMAP on the laptop.

An important detail: when I check the same emails in Gmail through a web browser, they are still marked as Unread. Only Thunderbird shows them as Read.

Could using the same email account in Thunderbird on two different computers be causing this issue? Could there be a synchronization or local Thunderbird setting that changes the read/unread status?

Could you please advise what I should check or change to fix this?

Thank you.

Hello, since few times it is impossible for me to connect to my mail serveur (sfr.fr) using thunderbird. I get an error message and it don't work even iI feel the good password (this one in functionning with SFRmail app.). I am using thuderbird for a long time and I should appréciate to use it anymore. Please see below a screen copy. Thanks in advance for your help, Regards, PATRICE Lagouy