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Keep getting this message: "The folder "inbox on [email address]' could not be compacted because writing to folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again."

I have tons of space, but I don't know which folder you are referring me to. Does it have a name? Does it reside in a specific subfolder? Can you give me some hints to locate the folder? Is this really the problem, or does the message indicate something else is amiss.

Thanks, Don

Updated to from Thunderbird 115.10.1 to 116 and now cannot send emails -- on two different machines: one an iMac (OS 18.5), the other a MacBook (OS 17.x).

Ten seconds after hitting "Send", we get an error message saying "Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: EHLO [13 character string] internal error AUP#EML-005."

Our settings and password have not changed, and they are all correct according to our ISP. Tech Support at the ISP says they are not blocking our emails -- although that is what a "EML-005" error usually means.

(In fact we ARE able to send emails via the ISP's Webmail interface, no problem. But this interface is old, very clunky, and not a satisfactory solution to our problem.)

VPN is off. Problem persists when Firewall is off.

Have tried a clean re-install. Did not help.

Have reverted to previous version of the app and Profile folder, using Time Machine backups from before the update. Problem persists! (How can this be??)

ALSO: We have a MacBook Pro that has not been updated. It is still running 115.10.1 -- and it can still send emails in Thunderbird, over the same network connection. All SMTP settings are exactly the same. How can this be? I tried copying the Profile folder from the unaffected MacBook Pro to the iMac. This did not fix the problem.

What to do?

From: cartwrm@talktalk.net <cartwrm@talktalk.net> Sent: Friday, July 18, 2025 2:14 PM To: no-reply@mozilla.org <no-reply@mozilla.org> Subject: Re: Bradforth posted an answer to your question "Ive lost mybookmarks on the left side of the screen"

It's really strange (I'm still trying to understand my relatively new Windows 11 laptop), bookmarks have been where I'd expect them for a few days, then this morning, it's as if Firefox has done some sort of clean/re-arrangement. The bookmarks had disappeared and there wasn't my usual array of sites available along the top. Then by clicking on a few things on the right (Firefox) 'most used' re-appeared, then later the toolbar is there on the right, I'd really like it back on the left And also I'd love to know whether I might have done something unconsciously which caused this.

Mike

Why Mozilla don't have download manager like mozilla PC We need it cuz the application use the phone download manager and it's trash if click in download its stop Exit from it stop and its very slow really snail We need it application is perfect why don't have this future

Pls do it 🙏🥺

When I change a setting in TB it doesn't save it and reverts to old settings on restart. There is no "Save" button on the settings screen. I have looked for the Prefs.js file in the Profile folder to see if it's read only but it doesn't exist. I have checked that hidden files are not hidden in the explorer view setting. I have searched my entire c drive for prefs.js and the only ones there are in the Firefox profile folder. I have looked for any .js, .json files that resemble anything to do with preferences or configurations and see none. All the advice I can find on Google has been exhausted. Help!!

T B 128.12 The Window which shows saved passwords is TOO SMALL. Cannot see the full entries. Also, the little 2 sided window to expand the entry does NOT work. As it is, it is practically useless.

I was forced to erase my PC because it was infected with malware. I saved my Tbird profile to my HDD before erasing. I pasted the saved profile to %Appdata% >Thunderbird, copying 1,777 items. When I brought up Tbird, I got the Account Setup window, so I don't think the profile was actually there. What did I do wrong?

I changed hosting services because support on the former one gradually became nonexistent. Okay, now I have two sets of mailboxes on Thunderbird, one set on the old server (messages up to February 2025) and one set on the new server (all messages thereafter). Yesterday I set about migrating to get all the messages onto the new server so that I can discontinue the old service entirely. Mailbox by mailbox I copied my entire email filing system successfully – with one exception. When I tried to do this with my "Sent" mailbox, the messages just don't move.

Okay, try a workaround: on the old server I created a new mailbox called "Sent messages" (in contrast to the built-in "Sent" mailbox). I moved all my messages from the "Sent" mailbox to that one. Success. Now I tried moving (or copying using the alt key) messages from "sent messages" to a mailbox of the same name on the new server. Nothing happens. Or perhaps, sometimes it copies the one message that I directly pointed to but will not do a mass move or copy.

I'm guessing that it has an issue with moving messages that are 'from me'. But I really want to save this history! is there some good way around this issue?

After my pc has been on for a while, seemingly random duration, Im not able to open firefox anymore. For example if clicking on a link in discord, or if I close the browser and want to open it again. I've tried refreshing and reinstalling but that didn't help.

TB New V140 has an issue: when adding a new email account the wizard stays in a loop, no information why and no option any more to add the account data manually. No idea why it's necessary to keep users out from a manual setup and let them use a not working apple style wizard....

Me and my colleague are using the same email account on Thunderbird. How do I delete the account from only my Thunderbird app? My colleague will still need access to it.

In Thunderbird mail I set Appearance to my personal preferences...

For me my preferences are : Table View, Non Threaded and Sort By Date In Descending Order Applied to all folders...

There does not seem to be any specific function to save these settings.

So... Whenever I restart my computer my preference settings are ignored and my email account subsequently displays the opposite settings.

Am I missing something --- Or is this a new bug ? It never used to be an issue !

Ich habe eine E-Mail Adresse seit 25 Jahren (die will ich auch nicht verlieren- Kinder ,Enkel und Freunde kennen die Adresse) Jedesmal wenn ich ein Neues Passwort Neu generiere kommt diese Antwort "Der Posteingangsserver wird bereits verwendet" So ein Müll gibt es bei keinen anderen Anbieter. Wie kann ich dieses Problem lösen.

Bonjour, Je classe mes mails dans des dossiers par thèmes. J'ai perdu 2 dossiers. Est-ce possible de les récupérer ? comment faire? Je ne les ai pas supprimés, ils ont disparu ! J'ai accés à ma messagerie avec mon Mac et mon Iphone sur Thunderbird. Merci de votre aide Thank you !

I use Thunderbird as main email client on PC, I also access via iPAD email

On iPAD if I get a Calendar invite (eg Teams) I can scroll to bottom of the invite, and there is an option to add ICS file to Calendar. I click on it and it pushes the invite to Google Calendar, and it inserts the correct appointment.

However on my main device (W11 PC) Thunderbird does not show any ICS file. There is a banner that say "This message contains event information. Enable a Calendar to Handle it" Can it be configured to use Google Calendar as the linked Calendar ? If so, could someone explain to me how to do this.