Thunderbird Support Forum

I cannot send emails from Thunderbird. I am using MS Windows 10 and my ISP is comcast.net. My email provider uses MS’s Outlook servers. For years I had no trouble using Thunderbird. Even after my email provider switched to using Microsoft’s Outlook servers. But when I subscribed to Microsoft’s Office365 and accidentally opened its Outlook module/application I was no longer able to send out emails. I could of course receive and send emails when I logged into the web version of Outlook, but while I could still receive emails I could no longer send them via Thunderbird. When I installed the latest version of Thunderbird (78.14.0 (32-bit)) I was no longer able to even receive emails. However, when I set up a “new” account (and used the email provider given password, which works at the web version of Outlook) and switched from POP3 to IMAP I was able to receive emails again, but I am still unable to send emails. I have tried numerous settings for my Outgoing Server (SMTP). None have worked. So my questions are: 1. What are the appropriate SMTP settings? I’ve tried so many, so I’m not providing the current ones. I’d like to start with a clean slate! 2. Are there any settings elsewhere that I need to tweak? 3. Why can’t I see (and alter if necessary) my password in my settings? (I assume they are still the appropriate ones that I inserted when I set up my account again.) However, even when I manually insert them after an error message and a form asking for my password they do not work. I’ve tried it with my antivirus and firewall protections (Webroot & Windows) turned off. SC

My email account with Thunderbird was working fine until I rebooted. Now I'm getting the Account Setup page when trying to launch Thunderbird . As I am not a technical person , I need step-by-step instructions how to restore my email account . Your help is much appreciated .

I have started to have emails disappear from my in box. I have been in touch with my internet provider with no luck as they think it may be some thing with in your system. I am not what you would call computer literate so I have no idea what is going on. Any help will be gratefully received Regards Geoff Chatfield

The spell checker is constantly using English (USA) and not English (UK). No matter what I set it to it reverts. I suspect every time there is an update it does this and it is extremely annoying for anyone living this side of the pond (In the UK).

PLEASE can we have English (UK) by default. I notice when you add it to the list of languages in settings the USA version cannot be deleted.

Like many, I'm getting Authentication error using gmail. I had no problems on my old computer under Windows10. When moving to a new computer with Windows11, my main gmail did install. However, 2 other emails, I also need, will not install without this error. I'm using McAfee LiveSafe antivirus on the new computer. If I can't solve this, I'll no longer be able to use Thunderbird (which I like!).

Today my 102.0.1 has disappeared. TB has worked for me for decades including now on 102.0.1 which is the latest version. I've downloaded 102.0.1 again but still doesn't show up.

My version of Thunderbird is 102.0.3(64-bit). It will not update. i keep getting a message that it is not able to download the update and need to download a new version for the update. Can any one help me. Thanks

I was told to reboot my system to complete a Thunderbird update.

After the system came up, my main email account wouldn't display. It was there when I went into account setting but wouldn't show. After closing an opening Tbird several times it showed up. now none pf my filters are running. In some cases it says the folder doesn't exist when it does! Most of the rules are missing actions!

What's up guys???

Until yesterday I could click on 'Inbox' and it would shows all emails from all 3 accounts I have set up. There was an update yesterday (102 1.2) Now although I can go to each email account individually, when I click on 'Inbox' it only shows emails for one account.

It also seems that search is also not functioning across accounts.

What must I do in order to enable address book address information. Now when I try to change address information it is as though my keyboard as been disconnected. thanks

Hi Thunderbird updated itself to 102.1(and now 102.1.1) and it lost 2 of my mailboxes or at least the inboxes. I have tried repair folder in the preferences for each inbox. The inboxes are greyed out. The location in the preferences, imap://driver_al%40*********@pcluster02.stablehost.com/INBOX, takes me now where or at least I can not find it. It is does not even seem like it is checking for new mail in those boxes.

I have a total of 11 mailboxes of mixed imap and pop. Only 2 seem to be effected both imap. I have looked in the profiles folder but do not seem to find them there as the folder names do not match the mailbox names..

I have Thunderbird 102.2.1 (64bit) on a pc win 10. Today it stopped working properly. when opened, the window is white and blank. yet, when i hover the mouse over it, i am able to select from the tab buttons at the top. the only way that i can see thunderbird normally is if i put it into troubleshooting mode. my business depends on thunderbird to work, so please help.

I just installed TB 102. I have multiple cardDAV accounts set up in Thunderbird, they synchronised fine as far as I can tell. But when I type anything in the field "search all address books", nothing happens. Even if I press enter. The entire list of contacts remains displayed, I can scroll it, as if I never typed anything in the search field...

Any view what I could be doing wrong? I have only two add-ons: Dark Reader and Addon Compatibility Check.

I am trying to send an e-mail to an address I have sent before and get this message: Sending of the message failed. An error occurred while sending mail. The mail server responded: 28AIcTF2017255 This message has been blocked for containing SPAM-like characteristics.. Please check the message and try again.

How often does 102.0 update? It appears to update every ten seconds by my estimation because every time I launch it updates before loading. I can close it and open it seconds later and it pauses to update again?

Is this some bug that it keeps updating no matter how many times a day I may open or close the program?

Should it just check and remain silent if there is no update?

I am going to turn off updates until I know why it does this. Never had this issue with prior versions.

Hi! I have a lot of IMAP mail account and want to store all relevant mails in an lokal account stored on an local folder. So I created an new local account and selected in the account settings at the option Message Store Type "File per folder (mbox) to store each folder in an separate folder an the local file system.

The Account Name: RS_Mailablage_Zentral Local Directory .....\RS-Mailablage_Zentral

Now I want to move/copy some mails from the IMAP-account to the new local account in an new created folder. But it doesn´t work either by drag & drop nor by using the the option "Move to" in the Message-menu. It doesn´t work in the troubleshoot mode.

In the local directory I found all the created folders from TB as directory foldername, as directory foldername.sbd and as file foldername.msf. You can find some screenshots at the uploaded pictures.

Please can you help me to find a solution.

I use TB version 91.13.0 (64-bit) on Windows 10 Home version 21H2

Just yesterday, I tried to download my latest email with "get messages" on my PC but got a message saying "error with account stanmalette" and "Sending of username did not succeed. Mail server pop.embarqmail.com responded: stanmalette is an invalid mailbox.Account name should be the fully qualified email address". I can still get my thunderbird email on my phone, but the PC seems locked as of 10/24/22. Should I set up the account again, or download Thunderbird again, and should I be pop or imap? I have been using Thunderbird for many years and this was unexpected and confusing. Stan

I've used TBird for years as my program for email. Monday, Oct. 24th, a window popped up, saying my "user name" was not valid. Another window said to "retry, change Pword" BUT I can go to the Centurylink.net web site for email, sign in, using my user name, and 'old' password and get in. It seems that the problem is with TBird or Centurylink. Century link is in progress of selling to Brighthouse. Note: on their email site, I've lost a lot of emails, but it seems to work. At least, I can receive and send emails thru their site! I've checked my TBird account for SMPT settings. (another window that pops up saying "check smtp settings") They are correct for highermark@embarqmail.com. the default setting reads:" Outgoing server-smpt.embarqmail.com(default). I just want someone to enable me to use my user name so I use TBird (with all my emails and info)......or tell me what to do.....or fix the problem.

 I may have to eliminate TBird program and try to start over, with importing? IF so, how can I delete the TBird program? I'm using Win. 10. Settings? mjm