Yahoo / Thunderbird login changes / notes

Note / announcement about yahoo / thunderbird login

Apparently related to having more than one account logged into from a Thunderbird instance using this authentication method.  Need to set up multiple "cookies" for use on appropriate platform.

Using IMAP to access

https://support.mozilla.org/en-US/kb/thunderbird-and-yahoo

You may have been asked in Thunderbird to log in your Yahoo, ATT or AOL accounts, or seen a notice with the title Upcoming Account Change. This is the result of Thunderbird, as of version 148.0 on February 22, 2026, switching to a more secure authorization protocol known as OAuth2 with PKCE. Below are instructions to assist you in the log in process.

In addition to enhanced security, this update also allows you to access Yahoo, AOL, and ATT calendars and address books in Thunderbird, which is a major new benefit to users. If you need more information, see OAuth2 Authorization below.

You have only one account

If you have only one account, then no change is needed in Thunderbird for PKCE to work. You just log in ("authenticate") by providing your email account and account password (App passwords do not work with OAuth2), and then confirm that Thunderbird may access data on the provider's servers (AOL, ATT, Yahoo, etc). This is a normal and safe process. If you have difficulty, please see Detailed Troubleshooting Steps below.

You have more than one account

If you have more than one account, such as one AOL account and one Yahoo account, to allow PKCE to work you must:

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message filter backup in Thunderbird

since the addon has died, the file with the file needs to be restored when the Thunderbird program is stopped.  Kill all instances, then use the following to deal with it

http://kb.mozillazine.org/Filters_%28Thunderbird%29#Export.2FImport

Export/Import

The message filters for each account are stored in a "msgFilterRules.dat" file in the accounts "local directory". The local directory is specified near the bottom of each accounts server settings by the browse button. You could copy that file over the corresponding file in another account. You could also copy and paste filters from one file to another using a text editor. Its a ASCII text file whose format is not hard to figure out.
There is a Message Filter Import/Export but several comments on that add-ons web page claim it doesn't work anymore.

--30--

Wndows antivirus utility kills mail foldeers on Tnunderbird

virus which are transmitted w/o encoding cause entire mail files to be killed by stupid windows anti virus.

here is a discussion of the problem and how to cure it on various platforms.


https://wiki.mozilla.org/Thunderbird:Testing:Antivirus_Related_Performance_Issues

Thunderbird System setup

Thunderbird Extensions.   See Tools->Add-ons and search, or use links below

The message export died.  use this entry to deal with filters.

Thunderbird Message Filter Import/Export Enhanced

https://addons.mozilla.org/en-US/thunderbird/addon/tb-import-export-wind-li-port/?src=search


https://addons.mozilla.org/en-US/thunderbird/addon/password-exporter/?src=search 

Get rid of double spacing format in composition (new install)

https://support.mozilla.org/en-US/questions/1118727

Go to Tools > Options > Composition > General tab.

Here you need to uncheck where it says
"When using paragraph format, the enter key creates a new paragraph."

 Change location of profile

It's possible to move the location of a profile folder. This could be useful if you have a backed up profile folder somewhere on your hard drive and want to tell Thunderbird to use that as your profile. This section explains how to do this.

1. Shut down Thunderbird completely (File > Exit).
2. Move the profile folder to the desired location. For example, on Windows XP, move the profile from C:\Documents and Settings\[username]\Application Data\Thunderbird\Profiles\xxxxxxxx.default to D:\Stuff\MyMailProfile. If you are reading these instructions because you want to restore a previously backed up profile, this step isn't necessary. Just note the current location of the profile you want to restore.
3. Open up profiles.ini in a text editor. The file is located in the application data folder for Thunderbird:
   • On Windows Vista/XP/2000, the path is %AppData%\Thunderbird\
   • On Windows 95/98/Me, the path is usually C:\WINDOWS\Application Data\Thunderbird\
   • On Linux, the path is ~/.thunderbird/
   • On Mac OS X, the path is ~/Library/Application Support/Thunderbird/
4. In profiles.ini, locate the entry for the profile you've just moved. Change the Path= line to the new location. If you are using a non-relative pathname, the direction of the slashes may be relevant (this is true for Windows XP).
5. Change IsRelative=1 to IsRelative=0.
6. Save profiles.ini and restart Thunderbird.

© 2002-2005 David Tenser.

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