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Mostly the Trash and Drafts folders shown very large, incorrect numbers, in the hundred. Even if I mark as the folder read or empty the folder. Numbers don't change, just keep growing. Any ideas? I've tried some suggfestions from the internet but none work

Im not sure what the heck happened about a month or so ago, and I have still not resolved it. I did check on thing that was suggested to me, but it didnt really make much of a difference. After an update at about that time, my email folders I made appeared all wacky in the sense that some folders were grayed out, but still retained subfolders (with their contents) in them. I dont know what that means or why they are grayed out. I also noticed a bunch of folders named Userfolder with a number after that. They contain many emails in each one, like they were removed from the original folder they were in. So I dont know, for most of them, what folder I had them in. Im thinking I can try and match them to the grayed folder they might belong to, but not sure on where some go. I have no idea why this happened, and I have been trying to use Thunderbird since then. Im attaching a photo of what part of my Thunderbird, folders & grayed out folders look like. I just want to know how to correct this and get things back in order. I dont know if I did something in the settings or what. Plus this was over a month ago. Ive just been using my yahoo mail account on the web.

For years I had an pop account in my Thunderbird, next to my Imap account. Both live happily next to each other. Today I moved all the mails from my pop account (which was no long active, nor was it connected to a server) to my local folders. I found out that all of my folder were suddenly twice the size. Compressing didn't do a thing. Why is this?

I had heard that Thunderbird is a great ad-free alternative and I started using it some time back as an alternative to direct Yahoo or GMail use. I did not know that your default is to delete (from the server also!) mail older than 30 days!!!

I've had medical and financial records and other things that I've kept for years on my Yahoo account that are just gone due to your settings. Is there any way that I can recover messages from certain folders?

Bradford Trayler btrayler@yahoo.com

I am unable to move an email from my inbox to my folders.Thunderbird is unable to complete.Get [clientbug]append error message.AI informed me that yahoo did an upgrade and Thunderbird now has is issues with Yahoo and needs to do a upgrade.Is this true?

I accidentally dragged and dropped the "Inbox" of a POP3 account into the "Drafts" folder, nesting it there. I tried to drag the "Inbox" back to its proper location (directly under the account), but I am unable to drop it (the cursor indicating a valid drop target does not appear). What should I do?

Hello I have just set up Thunderbird successfully and I'm trying to fine tune it.

In "account settings>synchronization I checked to keep messages on this computer. I think I understand that that means all synchronized folders including inbox in TB will match up with the same on the server, headers and main text body. If I uncheck that setting while online, does that mean that all message bodies will immediately be deleted from my TB profile? or does it only apply to new downloads so that headers only are downloaded, until they are clicked on?

Hello,

I urgently need technical assistance with a serious issue involving Mozilla Thunderbird and my professional certified email account (Aruba PEC, Italy).

I have been using Thunderbird to manage my professional email correspondence for several years.

I organize processed emails into yearly folders (2024, 2025, 2026, etc.), located under my email account in Thunderbird, not under Local Folders.

Today, October 13, 2026, I discovered that all emails dated January through September 2026 have disappeared from my "2026" folder.

Only emails from October 2026 remain.

The missing messages include professional correspondence, certified email delivery receipts, acceptance receipts, and potentially legally significant communications.

What I have verified so far:

The "2026" folder exists both in Thunderbird and in Aruba Webmail.

Both display the same remaining emails from October.

The Trash folder is empty.

The 2024 and 2025 folders still contain their messages.

Thunderbird's retention settings are configured to "Don't delete any messages."

The "2026" folder inherits the account's retention settings.

I did not knowingly delete or move these messages.

Aruba customer support informed me that they cannot restore the missing emails.

I checked Windows Previous Versions and OneDrive, but no backup was found.

I located the local Thunderbird mailbox file named "2026" in the profile's ImapMail directory. It is approximately 3 MB.

Inspection of a copy of this file did not reveal message headers from before October 2026.

I could not find another larger copy of this mailbox file in the Thunderbird profile.

I occasionally remove unused folders under "Local Folders", but I do not recall deleting any folder containing these messages. The affected "2026" folder is located under the IMAP email account.

My questions are:

Could Thunderbird have deleted or moved these messages automatically despite the retention settings?

Could IMAP synchronization, folder corruption, message filters, or compaction explain this situation?

Are there any additional Thunderbird files, caches, databases, or recovery methods worth investigating?

Is there any way to identify when or how the messages were deleted?

What steps should I take to prevent further data loss?

I have preserved a backup copy of my Thunderbird profile and would prefer not to perform potentially destructive operations.

This is particularly serious because the missing messages are part of my professional and legally relevant correspondence.

Any technical guidance would be greatly appreciated.

Thank you very much for your help.

I have been using emails without problem until recently but since a few days ago, it suddenly happened that I now cannot attach files. I have reinstalled software but still I cannot. I was asked to ask email provider so I asked nifty but they have not responded. Another issue, after reinstalled software, description is now shown in English. I can understand it but I would like to know how it can change to Japanese. I would appreciate very much if someone can help to solve this issue. Thank you very much. redacted@nifty.com