Thunderbird Community Forum

Cannot add Outlook acct. Found settings automatically - OK. Error: cannot authenticate. Addy has 3 "-" between 3 words - possibly problem Two other Outlook's fine Tried Windows 10 & 11 boxes both fail. Manual config fails. Tried smtp with "." and "-" before "office365.com"

I recently got a notification that a Thunderbird update was available, so the update was downloaded and installed. Next I went to my inbox to tidy it up, by deleting some items and archiving some that I wanted to keep. On looking at the 2026 archive none of the items where found.

Why has this happened and is there any FIX ?

Environment:

• Thunderbird 153.0.2 (aarch64)
• MacBook Air, M4, Tahoe 26.5.1

When I try to create or rename an Inbox subfolder in Thunderbird it all seems’’ to work (no error message), but after pressing “Rename” or Create” nothing happens.

Thought I found a workaround: Created a “Temporary” subfolder in “Local Folders” and “moved it" to the Inbox. And it showed up there. (But it was still in the “Local Folders”!). Tried moving a (Spam) email into the Temporary folder under the Local Folders, that worked. Tried moving a (Spam) email into the Temporary folder under the Inbox—it just disappeared! It was no longer in the Spam folder, but did not end up in (either) Temporary folder.

How can i get new messages in a thread to move the thread to the top? (I have descending order selected) I miss new incoming replies when they sorted weeks or months ago by the original email date.

I have used Thunderbird with the same email account for years, creating subfolders and moving emails to the subfolders with no issues.

With Thunderbird 153.0.1, after creating a new subfolder in the account, when attempting to move emails to the new folder, I receive the following error:

"Thunderbird: The current command did not succeed. The email server responded: APPEND invalid flag list"

Since upgrading to Thunderbird Meadow 153.0 and 153.0.1 when I click on show remote content it opens new tabs in Firefox 153.0. and 153.0.1. The remote content does not appear in the email. Depending on the amount of remote content results in the number of new opened tabs. I have restarted both Firefox and Thunderbird without any differences in the outcome. I did not change any of the settings upgrading to version 153.0 and as far as I can remember I have not changed any settings in 20 years.

I get USA TODAY Daily Briefing by email every day. For some time it's been duplicating stories and ads in the same message. This does not happen with my iPhone. I have used AI to try to fix the problem but to no avail. Any suggestions for how to fix?

I have been shifting my email platform from Comcast to the new Yahoo platform. This has worked for my iPhone and for my Thunderbird app on my iMac. But NOTHING works for this on my MacBook Air. My gmail is fine, but the only way I can get to my new Yahoo platform is to sign in via the web browser. Thunderbird will not configure for the MacBook Air, and I've tried 10-15 different things already (not an expert by any means). I have all the proper settings. I have reinstalled Thunderbird on the latter machine.

Within the past day or so, which means 7-18-26 or later, some of my email messages on thunderbird for my pc have a "From" description that is not correct. I look at the messages, and the "From" is entirely different than the "From" description when looking at the email message list. I have never encountered this problem before. I'm using thunderbird 152.0.1 64-bit on my pc.