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Since yesterday afternoon ( March 26 ), I have been unable to send emails via Thunderbird but I can receive them. When I attempt to send an email I get an error message as shown. Could someone assist me in resolving this problem

I'm using Thunderbird 115.9.0 (64bit) on Linux Mint.

Yesterday, I performed a complete reformat and upgrade to the latest version of Mint and I've been struggling to read emails in Thunderbird ever since. The text in the emails I receive is absolutely tiny - I'd say it was almost impressively small if it weren't so infuriating.

I've included a screenshot example of what I'm talking about. Note the size of the subject line at the top to see the disparity.

I've scoured the support pages and carefully followed the instructions given, but the aside from increasing the font of the program itself, there is no change in the text size of the messages themselves.

Any help you can provide will be greatly appreciated.

I do like to work with Thunderbird - 115. At the moment there is one issue - for me very important - that prevents me to work with it. Since the last time TB executed a "compact folder" process i cannot recover the "compact away folders). I have indeed found the folders and everytime i copy them back in the profile, tb is filtering the "compacted folders" away again! To mention here is that i have turned off the compact process in the settings. It is indeed a bit frustrating. Even if i delete the account in question - in this case iCloud - and reinstall it with a new password, the folders will appear in my folder list and disappear after a few seconds...! Is there a parameter/filter that have to be turned off manually in the profile to reolve this issue? Please help - otherwise i will have to continue to work with Apple Mail - which is against my purpose. Thx a lot.

I am on a new install of windows 11 (from new windows 10). I can log into Gmail on the browser(Firefox) fine. I set allowing cookis and all the other stuff I could find but I can NOT get gmail to work.

Also when I try to send an email (new message) it comes up with Newgroup where the recipient email should be

Links have been going through linklock for some time. Starting today, every one of those is blocked with a bad certificate error from BitDefender. How to stop links in Thunderbird emails from using linklock? I would like to directly to the website.

To receive emails, I'm asked for a password--I've entered every password I know that is connected to my email accounts and provider but I'm still asked for a password. Over and over it happens. Then, all of a sudden, it works.

When running Thunderbird in Dark Mode, the message pane (that shows the message when you select it from your inbox) still has a white background. This makes perfect sense, because a dark background can easily mess up HTML mails.

Which I know because the compose / reply window does have a dark background, making it all but impossible to read what you're replying to if it was a HTML mail.

I would like to set the view and reply window to use the same background. Can this be achieved or is this a bug?

I am unable to login to the DVLC. I get as far as the enter reg number of a car to check it,s been taxed. Then after I input the reg number the next page tell me it is an insecure page. This also happens on my laptop. On both desktop and laptop I am using firefox with duck duck go as an add on. However. In using my mobile with the stand alone duck duck go browser, I can log in and complete the task. This points to a problem with Firefox. Any advice's. This seems to be recent as I have used the laptop and desktop to use the check for a taxed car system ok in the past.

For several weeks I have had to go to webmail to get mail. It is there, but Thunderbird is not downloading it regularly...only sometimes. I have uninstalled T, and re-installed it several times. Sometimes this made a difference and downloading resumed, but for the past 24 hours no mail has downloaded. It is time to quit T?

I successfully logged in using oauth2. But after I clicked the "allow" button on the oauth2 page of google. However, after that, I still see "unable to log in at serve. Probably wrong configuration, username or passward".

How can I set up an additional email address? Previously, I used marianne@debeeltenis.nl for a debit card. This now appears not to be found anymore. With what steps can I import this email address so that there are 2 email addresses: info@debeeltenis.nl and marianne @debeeltenis.nl ?

My Thunderbird in box stopped updating In box Jan4 10:46 NZDT. Have tried deleting and reinstalling. TB , no better. Need it working ASAP. All my house hold bills come to this klw@walt.nz on Thuderbird. regards KLW