Thunderbird Community Forum

I have a filter setup to forward certain emails to another account. It has been working fine for years. Suddenly today I am getting an error message about not being able to contact the smtp server. If I manually forward the email to that same address it goes fine.

Thunderbird flatpak -1.0 I recently lost the ability to attach files of any kind to messages. when I click the button to attach, no option to choose messages from files are available. I cannot go to the file and share with Thunderbird. I cannot copy a file and attach it. I have tried restarting Thunderbird, and my system (Po_OS Linux) with no result. thanks for the assistance!

Greetings,

I perform a daily thumb drive backup of Thunderbird in the event that my PC crashes (which it has) so I don't loose emails and contacts. I'm aware of two methods to do this. I've tried both, and one method saves more file folders than the other. My question is: Which is correct to use?

One method is described here: https://support.mozilla.org/en-US/kb/thunderbird-export The other method is accessed from the main page of Thunderbird: Import/Export > Backup, select OK and then the location and folder where you want the data to be transferred.

The first method captures four main folders and other files listed below them. The second method captures ten folders and all of the same files as in the first method.

Because they are different, I'm unsure of which to use and, additionally, why would two methods be offered?

Thank you in advance for your comments and advice.

I have three separate Yahoo email accounts. I set up Thunderbird to link to each Yahoo email account separately. It worked fine for a year or more. On 5/25/26 one of the three Thunderbird email accounts stopped downloading emails from Yahoo. I could see at the bottom bar Thunderbird indicating that is was downloading 1 of XX emails, but never actually downloads them. There is no error message. I checked the Yahoo email account to verify the number of emails I am missing from Thunderbird and the number is correct. I can see the emails in Yahoo. I'm the only person using Thunderbird, so no changes have been made to previous settings for retrieval. I confirmed Security and server settings for Thunderbird in and out going emails, and Yahoo are correct. I tested the connection in Thunderbird, and the connection is successful. I tried to send an email from the Thunderbird account having issues, and the email was sent and received by the recipient. The recipient replied, and Yahoo received the email, but failed to download it to Thunderbird...along with all the other emails since 5/25/26. I unlinked the account and reestablished the link between Yahoo and Thunderbird, and still not fixed. I tried restarting the computer, with no change. I tried to send an email from Thunderbird to one of the other Thunderbird emails and it was sent and received. I made changes to Thunderbird to force the download of emails, and it still wouldn't do it. I turned off my antivirus, closed Thunderbird, and restarted it, and that didn't change anything. The capacity of emails on the email in question only has 739 emails, so it's not over the limit and I have plenty of storage capacity. Thunderbird is set to save emails, Cookies and cache were cleared, no change. I ran the folder repair feature in Thunderbird, but there was no change. I compared all the settings between the other Thunderbird emails that are working against the one that isn't, and they are all the same. There was a suggestion to close out of Thunderbird and delete the "Global-message-db.sqite" file from the Thunderbird profile in case it was corrupted, and it would recreate this file when Thunderbird was restarted. The file was recreated, but it didn't fix the problem. There was mention that a suspicious email in Yahoo might be blocked by Thunderbird, so I placed various emails in the spam folder, and it didn't work. I did find one email in the Yahoo spam folder that was dated before 5/25/26 and moved it to the Yahoo inbox. Lo and behold, that one email downloaded to Thunderbird. So there is something within Thunderbird preventing emails from downloading after 5/25/26. I've read many people complain about similar download failures with no solid fix. Someone mentioned it fixed itself on a day, but then stopped again days later. Someone else mentioned Yahoo changed its password protocol to transfer emails, but that doesn't make sense since the other two are still downloading based on the "old" password protocol. I'm at wits' end. Thanks for reading all of this. I hope someone has a solution.

As of the latest update, the attachment toolbar button in a new mail window does....nothing. Nada. Click it, nothing. I have to drag the attachments from (say) Desktop to the new message window. Works, but...so should the toolbar buttons, which used to.

Tried turning off all addons (i.e., troubleshooting mode) - made no difference.

I apologize for the subject line, but there is no better way to describe the problem....

I've been using Thunderbird for a few months now and it has mostly worked well. Then this afternoon I was reading my mail in the Unified Inbox and I noticed something very odd. I had a number of emails showing in the header list with the same "From" and various subject lines. On the face of it, that wouldn't describe any weird behavior except that I noticed the subject lines absolutely didn't match the "From" information.

As I would go to read these emails, the email itself would be correct in the preview pane -- including showing the correct sender name and email -- but the "From" information in the header list pane would still be wrong.

I'm sorry that I can't post a screenshot to make this more clear because there is just too much personal information on screen. But these emails are from several different senders, received by several different email accounts. Everything is correct except that the "From" shown in the header pane is wrong. This is very obvious to me because I normally run entirely in the Unified Inbox with the emails sorted by the "From" information

One example is an email that is actually from "U.S. Department of Veterans Affairs <do-not-reply@notifications.va.gov>" which Thunderbird displays correctly in the preview pane (where I usually read my emails) and if I open the email itself, but the header pane says this email is From "Prepper-co <joshua@prepper-co.com>"

Another example is an email that is actually from "USPS Customer Support <uspscustomersupport@usps.gov>" but the header pane says it is from "Rainier Arms <sales@rainierarms.com" < p></sales@rainierarms.com">

These two examples were received in different email accounts that aren't even on the same server. I have other emails from these same senders that are shown correctly

I found this problem while using 150.0 (64-bit), which said 150.0.1 was available, so I restarted Thunderbird and it updated to 150.0.1 (64-bit) but the problem is the same.

It's very odd. Normally moving an email, say from the Inbox to the relevant year's archive, takes "no time at all".

Which is true for all the mailboxes shown on the attached screenshot, EXCEPT for the four at the bottom. Moving even one message from Inbox to Yiddish can take ten seconds or longer (with the dreaded "Not Responding" occasionally). Moving something in the opposite direction is also screwy, only from those four.

I had thought that it was because they're rather large. This first started when there were just Yiddish and MSW, and I split off most of the earlier years into the archives shown. To no avail.

It's only an annoyance, but I'm puzzled about how such a thing could happen.

Also very slow tagging or untagging a message just in those mailboxes.

Moderator Notes:

• need a performance profile https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance

Good day,

I have a site that I use for my Tia Chi Walking classes and lately I'm not receiving any communications from them. I've reported the issue to their support team and they responded with this error they've received when they try to send an email to me from the site: https://esmerise.com

smtp; 421 4.4.1 Unable to connect to remote host | 421 | TransientCommunicationFailure

The email address that I use is from my ISP Spectrum.net, however I use Thunderbird to sync all my emails. I contacted Spectrum support and they are not seeing this error, all emails appear to be coming through with them.

Please advise if anyone has experienced this issue and if so, how was it resolved.

Thank you Billie

Everything has been working normally for years until today. I cant retrieve emails from ATT servers and the only message is "Host contacted sending login information". It hangs for 30 seconds and then nothing... No error message is displayed. I read a similar post and tried following the back and forth, but didnt find any solution. What I have tried: -Copied an old backup copy of a profile into the default. -Checked the server settings and tried the option of using a password instead of OAUTH2. -Created a new profile and set it as the default.

Each time I had to restore the profile by copying a recent profile backup into the default

No luck with any of these steps.

Just updated to Thunderbird 157 and all my calendars are now disabled because the google calendar add-on is not compatible and was disabled. How do I enable my other calendars or move back to 156 while I wait for an update for the google calendar add-on?

Hi I am using TB 156.0 (64-bit) on Linux. I guess there was an update t TB and now when I reply or forward an email, the font size of the text is tiny. I also found that the font size for just viewing the body text of an email was tiny, but I was able to fix that. But for the font size in the body of a reply or forwarded email is tiny and I have gone thru all the settings for hours with no luck. Any help much appreciated.

I have an account - david.woodcock@skynet .be that is no longer active. But Thunderbird is still trying to connect to it and download messages. How do I stop Thunderbird from trying to access this account?

Seit kurzen kann ich beim senden einer Nachricht keinen Anhang mehr hinzufügen, es öffnet sich kein Auswahlfenster mehr, was am 8.09.26 das letzte mal noch funktionierte. Weder über die Büroklammer, noch übers Menü Datei-Anhängen-Datei(en). Es passiert einfach Nichts.

In der Update-Chronik sehe ich am 19.09.26 ein Update auf 153.1.1esr !? Habe deshalb das neueste Update 153.4.0esr heruntergeladen und installiert, aber ohne Erfolg.

Hat jemand ne Idee? Ausgerechnet jetzt wo ich in den nächsten Tagen die Funktion dringend bräuchte...

Vielen Dank

A few days ago someone sent me an email with a .png file attached. Normally .png files open in something called Microsoft Photos but I accidentally selected to view it in PhotoPad, rather than in Photos. Now, every time someone sends me a .png attachment, Thunderbird always opens it in PhotoPad.

Is there somewhere where I can correct this so that in future, they'll go back to opening in Photos?