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I have trouble with the lack of clear outlines in Thunderbird.

In particular:

1. the lack of a line between the message header and the message body makes it harder to find the right spot to scroll messages

2. the lack of a line between the nav-sidebar and each section in settings means I *cannot* scroll settings without getting migraines from the @#$%% nav-sidebar. I have to tab several times and then page down.

I can't enable a high-contrast theme within Thunderbird. I can enable it at system level, but it breaks many other apps, and it breaks my cursor and highlight color settings, and I have to recreate those settings each time.

I can search for "contrast," or "outline," under themes, for example: https://addons.thunderbird.net/en-US/thunderbird/search/?q=outline&cat=themes&appver=148.0&platform=WINNT

I can't tell which themes are supposed to fix what; I tried 4 of the resulting themes, some added other outlines, but none added the needed outlines I listed above.

Since the update on 2/16/26. I have not been able to access several websites that I was able to before the update. Hoe do I uninstall this update and all others after this date

Hello everyone,

I’m wondering what exactly "remote improvements" actually are.

Mozilla says: "Remote improvements range from fixes to feature changes to Firefox. They are delivered remotely between versions and updates to make your browsing experience stabler and richer (...)."

They are not studies or A/B tests, as those are enabled/disabled separately. They also do not concern WebCompat shims, Safe Browsing, or similar features, nor larger security fixes or more significant bugs that are resolved with a out-of-band update – correct? Is it similar to Windows CU Previews - meaning improvements, fixes, and feature changes that would be included in the next upcoming regular update anyway? Not a case of "let’s roll something out and see how users react" thing?

Have I understood that correctly?

Thanks and best regards, Martin

Hello, I apologize, I am uncertain if this is the appropriate place to post this topic. I am having significant difficulty with the forum system when we require assistance.

I have been using Thunderbird for over a year now, and I have wanted to stop using it since the first month of use. Several times a month, I am unable to send messages even though I haven't made any changes. The message keeps popping up: “The message failed to send. The message could not be sent because the connection to the outgoing server (SMTP) ”server name" failed. The server may be unavailable or refusing SMTP connections. Please check that your outgoing server (SMTP) settings are correct and try again."

This is supposed to be my work email. I understand that ThunderBird is a volunteer platform. And that you do what you can, but I can't afford to be stuck like this for a “yes” or a “no.” You were highly recommended to me by my website host, and I regret it. I am no longer in contact with that person, so I can no longer get the assistance I needed several times a month to get the mailbox up and running again. However, I continue to receive mail at that address.

Is there a way to automatically transfer emails from ThunderBird to Proton Mail? If so, how do I do that, please?

Thank you.

I have lost the send, attach buttons on my new emails? not sure what I touched.

I can recieve emails and reply but when I want to write a new email I am not able to send it as the button to send is gone.

also the New Message button is gone.

Error msg:

Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) outbound failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again.

Attached screen shot.

Incoming messages are interspersed with old messages without any order. I tried to corrrect this by pressing "date" in the installation column to the right, but that does not help.

In my effort to solve a different issue, I have made things somewhat worse.... I do not see the option to display listing of unread/all messages. I do not see a Settings tab in the menu bar.

Please help. TNX.

_____________________________________________ desktop win11 pro Thunderbird 148.0 (64-bit)

I have Thunderbird 148.0 with windows 11. I have 5 email accounts. How do I turn off those unwanted and unneeded notifications of email messages. There are TONS of them and they are very irritating and serve no useful purpose that I can see.

HI, Thunderbird for Mac no longer allows me to see emails more than 4 months old. I have an AOL account and when I use the (lousy) AOL app I can see email going back at least a decade, so I know they are there.

This changed with a recent TBird update. I have checked online support, studied the different settings, and cannot find out how to set TBird to let me access all my email.

Can someone help me with this?

Thank you, James