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Starting on 10/01/2024 Thunderbird no longer allows me to send or receive email.

When I try to read messages using Thunderbird, I get the following: Sending of password for user XX@msn.com did not succeed. Mail server outlook.office365.com responded: Logon failure: unknown user name or bad password.

When I try to send messages using Thunderbird, I get the following: Enter your password for XX on smtp.office365.com:

I have tried redoing the password and it does not help.

This is on a WIN/10 system. I updated to the latest version of Thunderbird and it did not help.

I checked out Thunderbird on my WIN/XP and get the same results as with WIN/10.

When I use Firefox and login to https://outlook.live.com/mail/0/, I can send and receive email as before. The same is also true with my Mobile Phone.

I just installed 3 Add-ons Free Memory, Free Memory Button and Ramback but, apart from them showing on the Add-ons Manager, I can't find them let alone open them.................Does anyone know where they could be or what happened? Thanks in Advance

Since update to ver 128.1.0esr the "new subfolder" feature does not work (does not show window to name new folder). I have many subfolders and I rely on them heavily. I tried restarting Thunderbird, then Windows. I ran in debug mode with no success. I downloaded and installed 128.2.0esr again. No change.

Is it possible to go back to the earlier version? Which is? Thanks, Frederick

My thanks again to sfhowes, Rick and others for assisting me to get back my ability to once again send e-mails from Thunderbird. Now for the next step.

Just days ago, I migrated my years of Thunderbird e-mails on a POP protocol to IMAP. Before doing so and before also uninstalling my old Thunderbird because of e-mail sending problems and then reinstalling a new version, I saved a profile. Now with the most current version of Thunderbird, I lost (i)a decades worth of saved inbox e-mails (but for the last 2 years), (ii)I lost all of my sent e-mails but a few odd ones, (iii)I lost my archived e-mails in Local Folders and (iv) I lost all of my contacts and saved group e-mail address lists.

My profile is saved on an external hard drive. Obviously the new installed version of Thunderbird must have somehow found the last 2 years of my inbox e-mails but nothing beyond that as mentioned above. Can you share please a recommended procedure where I can better import what I assume I saved correct on the profile I saved twice (I saved a master folder named Profile and separately saved 4 folders - 2 folders ending in default and 2 ending in default-release. Thank you.

Last night I created a new profile in an attempt to fix a problem with downloading mail. (It turned out to be on the ISP's end.) Tonight I briefly opened two copies of Thunderbird, one with the old/original profile and one with the new profile, to make sure the download would work. I was able to download my new mail to the original profile, so I moved last night's mail from the new inbox to my original inbox in the new profile, and then deleted the new profile since I don't need it. But now the past six months' worth of mail is missing from both my inbox and my sent folder! They both jump from June 13 to yesterday. I noticed it when I had the two copies open next to each other (those messages were missing in both copies), but thought maybe it was a merge problem and hoped they would be restored when I deleted the second profile. But they weren't. I absolutely did not delete all those messages and many of them are really important. Where did they go and how can I get them back? Help!!!

p.s. Sadly I haven't backed up in a while... :-(

I've been using Thunderbird for many years with no problem. I'm now on v. 115.4.2 (64-bit). Suddenly, I can no longer send email. This is the message I get:

Sending of the message failed. An error occurred while sending mail. The mail server responded: <sy777@maine.rr.com> sender rejected. The email address you are sending as must match the email address you used to auth. Please check your SMTP settings. AUP#Out-1500. Please verify that your email address is correct in your account settings and try again.

I contacted Spectrum and received their recommended settings. The only difference I have is that my Authentication is set to NONE and theirs to YES OR CHECKED

My incoming email works fine.

Please help!

Hello! I updated FLOORP on the 5th May, FLOORP crashed and then Brave, Firefox, Waterfox, LibreWolf and Vivaldi started crashing. I had Brave and Vivaldi open when I launched FLOORP and FLOORP asked consent to update itself and after updating, it did not open in “previous session” and I could not open “previous session” through History. When I launched “Settings” from menu, “previous session” opened! I had pinned “Settings” earlier.

Now the bizarre happens; suddenly LibreWolf launches by itself also without “previous session” and open tabs in Brave and Vivaldi disappear to single New Tab. After some tinkering, I was able to restore “previous session” in LibreWolf, Brave and Vivaldi.

Now I close all browsers and open Firefox, no “previous session” and some random windows in its history, opening these random windows also opened “previous session”! 🙄But then Waterfox launches also without “previous session”, here clicking on OneTab extension recovered “previous session”.

Cutting short; I uninstalled, Waterfox, LibreWolf and FLOORP, this did not help, I ran System Restore twice to two different points and it has not resolved the issue.

Thankful for any help!

I changed my Gmail password and Thunderbird asks me to enter the new one, however, it displays my email address with a lit 'Next' button but the button doesn't take me to the next screen to allow me to enter the password, it just flashes, no matter how many time I click it.

When I reinstalled Thunderbird, I got my account back, but the Local Folders were missing. I found where they're hiding on my computer, but I can't figure out how/where to copy and paste that folder so they show up in Thunderbird. Can someone walk me through those last steps, please?

Thanks

I am running on TB release 60.5.0.

In the TB previous release, TF&SC worked fine for text (font) size control on incoming and outgoing messages. In the latest TB release TF&SC does not support the text (font) size.

The text size is miniscule. I can use the "ctrl +/-". However, this procedure is a drag when TF&SC has worked flawlessly in the previous TB release.

Is it not time for TB to have built-in text/font sizing control?

Your help on this issue would be appreciated.

Regards,

mikeandsylvia

I exported my profile to an external drive, then reset my Windows 11 PC. The resulting file is a zip file. When I import, the import starts, then stalls and gives an error. The error log is incomprehensible to me. How can I not lose my local folders and messages? I tried unzipping and importing that folder, but another error. I need help! Ideas? Thanks.

Image of the error attached.

I upgraded to version 115.2.2 (64 bits), on a Windows 10 OS.

I used to be able to reduce the pane of the message list, so that I could expand the contents of a selected message. But now it has a lower limit, where I cannot push the line up further.

Attached is an image showing the line of concern. I could drag it down, but no further up. How could I change this behavior?

Thanks!

Yesterday I upgraded Thunderbird from version 30 to 31, now while I writing messages the autocomplete for addresses is extremly slow to suggest contacts. If I enter only a letter in the destination field, thunderbird hangs for about twenty seconds and after show me the suggestions. Typing two letters quickly, thunderbird hangs for 13 seconds. typing 3 after 6 seconds All tested even in safe mode I have a local address book with about 9870 contacts (no remote address book) and before the upgrade everything worked fine

Is it possible to open incoming mails in the same window as the list of e-mails, just like in Google? I get distracted from seeing suddenly my e-mail in another window/tab.

Thank you!!

I was forced to erase my PC because it was infected with malware. I saved my Tbird profile to my HDD before erasing. I pasted the saved profile to %Appdata% >Thunderbird, copying 1,777 items. When I brought up Tbird, I got the Account Setup window, so I don't think the profile was actually there. What did I do wrong?

TB working fine, then next day opens up as Blank screen and a setup tab Profile shows to be still there as do mail folders .... so need to recreate profile.

Created a new Profile I copied over the folders:

 IMAPmail
 Mail

and the following files

 key3.db
 logins.json
 cert8.db

and all of the pref.js files (1 through to 141)

The profile folder does show new profile active ( as per this pic https://flic.kr/p/2pjRyRz)

I created the 2 IMAP account login details, I now have access to the inbox for 2 IMAP account, but I do not have any the filed mail (local folders) how do I get these back. This is an important item for me as many years of filed emails.

Is Mozilla working on the below email I have received from Microsoft? "The safety and security of your information is top priority for Microsoft. To help keep your account secure, Microsoft will no longer support the use of third-party email and calendar apps which ask you to sign in with only your Microsoft Account username and password. To keep you safe you will need to use a mail or calendar app which supports Microsoft’s modern authentication methods. If you do not act, your third-party email apps will no longer be able to access your Outlook.com, Hotmail or Live.com email address on September 16th.

What do you need to do?

If you are receiving this email, you are currently using an email or calendar app that uses a less secure authentication method to connect to your Outlook.com email account. You will need to upgrade your third-party mail and calendar app to a version which supports modern authentication methods.

Microsoft provides free versions of Outlook for your PC, Mac, iOS, and Android devices which can be easily downloaded and connect to your email account. Using an updated version of an Outlook application will ensure you are connecting in the most secure way.

How can you set up your Gmail, Apple Mail, or other third-party mail application?

Various non-Microsoft applications will have their own steps for connecting to your Outlook.com email account using modern authentication methods. See our help article - Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps. However, you may need to contact the creators of those applications to provide you with instructions. In many cases, simply removing and re-adding your account with the latest version of that application will configure it to use modern authentication methods.

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