marking a message as read does not do anything to remove it from the new messages you received. It should never have had the effect you are mentioning is my understanding.

It did not 'remove it from the new messages', it marked it is read and hence did not notify (on a taskbar) about a new unread message, since the message is marked read. That was definitely the behavior until the recent major Thunderbird upgrade, I've been using that filter for years.

It doesn't make sense that a message will be marked as read, yet the notification about an unread message will be triggered. Which is the behavior right now, hence it seems like an overlooked bug.

Did you find the solution? I have the same problem. I have a filter to mark all messages as read. This is SPAM account, I don't want to bother those emails every day. Filter marks all incoming emails as read correctly, but Account Folder doesn't mark as read and remain unreaded as well as notification badge. Status is changing after user interaction. Status of account change and badge does not disappeared until I click any folder in this SPAM account.

For support guys: it's easy to replace the problem. 1. Create new account 2. Create filter without conditions (all messages) with only one action: mark as read 3. Send email to this account 4. Message will be marked as read, but account not and notification badge will be still visible

I have not found a solution, I've stopped using the filter completely since the bug renders it useless.

I asked about this issue this a few weeks ago but no one responded. I don't know how to describe the problem properly, I guess. [https://support.mozilla.org/en-US/que.../1391836]

I will reiterate what I said way back in the first comment. If mail comes into your mailbox it is new mail and should appear as a notification. What a filter does or does not do it irrelevant to it being new mail.

There are certain messages we do not wish to be notified about.

We used to be able to do that with a filter, and now we can't.

Kindly restore that functionality. You can use whatever logic you wish to use, as long as the functionality is restored.

Hello

Well, I disagree with everyone, yes I'm contrarian :-) I use 102.2.2 on Kubuntu 22.04 (that's Ubuntu 22.04 LTS with a KDE frontend), installed from Apt. What I see: if I use a filter to move some message to a subfolder and then mark it as read, when the filter is hit, the system notification (a small window that displays briefly and is saved in a list) is *disabled*. However, the sound notification is played. Why I am disagreeing with everyone ? because first, marking a message as read in a filter really *has* an effect. So Matt is wrong IMO. And having 2 different behaviors for notification, disabling one notification while keeping the other active is inconsistent. And second, while I use a Thunderbird version more recent than the one cited by the OP, there *is* an effect. The system notification is disabled, and a workaround for the sound problem is to, well, disable the sound notification (that's a pain anyway, I had only enabled it to check on this problem, mail has never been intended to be intrusive it's a disconnected communication tool)

On the latest version on Windows (102.4.0 64-bit) the filter still notifies of new messages even though messages are marked as read, or, for those who prefer it phrased differently:

There is still no way to have Thunderbird not notify of certain messages, even though that functionality was available in the past through the 'Mark as Read' filter.