Thunderbird Community Forum

I get the messgae 'Unable to write email to the mailbox...make sure the file system allows you write priviledges and you have enough disk space.' When I looked at the errors Thunderbird recorded I found thei:

pop3.server1.2: Incorporate write FAILED! Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIPop3Sink.incorporateWrite] NS_ERROR_OUT_OF_MEMORY: Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIPop3Sink.incorporateWrite]

   _actionRetrResponse resource:///modules/Pop3Client.sys.mjs:1625
   read resource:///modules/LineReader.sys.mjs:67

Pop3Client.sys.mjs:1627:24 pop3.server1.2: Got an error; name=pop3MessageWriteError Pop3Client.sys.mjs:1702:20 NS_ERROR_OUT_OF_MEMORY: Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIPop3Sink.incorporateWrite]

I recently had to restore my thunderbird app as I had issues with my laptop. I do not run Avast...I have tried the 'repair' option in folder properties in thunderbird. Nothing seems to help. I would appreciate any assistance you can give me. I have been using Thunderbird for....well it has been aloooong time and I have never had any issues with it previously. I am running WIn 11 Pro.

Have an AT&T email account on 3 computers. Two of them running windows 10. One mqchine running windows 11. On the windows 11 machine, we set up a new email account and it doesn’t work. Sometimes you cannot send or receive. We delete that account and create a new one and sometimes it receives but does not send. It asks us to retry or enter a new password. We enter the password and still fails to authenticate. We tried setting it up as POP other times as SMTP. Still fails. Sometimes we get a yahoo pop up to help us set up the new email account but most times that yahoo pop up does not appear. We tried to match the setting of the windows 10 computer exactly and still doesn’t work.

Sometimes we get it to work using the above methods but fails after 1-2 weeks.

Any insights?

The summary says it - How do I make Thunderbird automatically close the 'original' message when I click Reply or Forward?

Outlook does this, and I find it odd that Thunderbird does not have a toggle for this. I find that I end up the day having to close out a dozen or so 'original' messages...

Please tell me there is a switch somewhere! :)

John

Hallo ich brauche Unterstützung,

Wie/Wo kann ich diesen Ordner Spam' in meinem Thunderbird Account 'juergen.plenske@t-online.de IMAP' entfernen/löschen? Die Pfadangabe 'imap://juergen.plenske%40t-online.de@secureimap.t-online.de/INBOX/Junk' des ersten Ordners ist falsch. Der INBOX-Ordner auf t-online heist 'Spam' und funktioniert als zweiter Ordner (unterhalb) korrekt.

Vielen dank für eine Lösung dieses Problems.

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My business has two domains. I can send email to a Gmail account holder using the primary domain with no issues. But amy emails from what I call the "secondary" domain below are treated as spam. This occurs with two different email addresses using the secondary domain.

Both domains are hosted with Bluehost. Exhaustive research has revealed the following:

• Settings in Thunderbird are exactly the same, e.g. ports, security, SSL/TLS, etc. for each domain.
• There is no subject line or content that could possibly be regarded as spam.
• MXToolbox indicates that the secondary domain is not on any blacklist.
• Extended support via Bluehost reveals that SPF, DKIM, and DMARC records are all correct.
• Email sent to a Gmail account using the CPanel (Roundcube) is not flagged as spam. Only emails sent via Thunderbird are flagged.
• Emails sent to a Gmail account from the secondary domain using my mobile phone, but still on the same network/IP address, are not flagged as spam.
• If I first send an email to one of the secondary domain emails FROM Gmail, then reply to it, the reply is not flagged as spam.

After many hours of head scratching (and later, head banging), I am pretty much at my wit's end with this problem. I'm an electronic engineer but this one is definitely out of my wheelhouse. Any help would most certainly be appreciated!

Thanks in advance, Don

Hi,

My mail account was recently migrated to office365, and I saw that Thunderbird v145 and later supports this natively without the use of a plugin.

However when I follow the instructions to set this up I don't see the Account hub in the same way that's shown in the article.

https://blog.thunderbird.net/2025/11/thunderbird-adds-native-microsoft-exchange-email-support/

instead I see the one attached.

I've tried this on both Linux (ubuntu 24.04) and Window 11 both with my original profile and a completely blank installation. On Linux I've used both the Canonical supplied Snap (from the monthly/stable channel) and the download directly from thunderbird.net.

Any help appreciated.

Two identical spam emails came in, and I deleted both from my Inbox. Both had attachments. Deleting them moved them to the Trash folder. When I went to the Trash folder, I found both emails had been combined into one file. Is that "threading"? I don't want any emails to be combined together EVER. Previously I had checked the "Unthreaded" box in Settings; so if this was threading, why did it happen?

Another question: I couldn't find anything to do with this combined file but to delete it. Did the act of deleting it also delete the attachments, which probably contained viruses?

This "threading" business has been going on for years now. I always check the options that supposedly disable it, but then it keeps happening.

Thunderbird causes my machine to 'hang' from time to time,

1. often for up to a second and usually a number of times in quick succession on each ocasion. Sometimes this happens frequently - say every 5 or 10 minutes - sometimes only after an hour or more since the past occurrance.

2. My machine hangs completely - nothing will work, mouse, keyboard, sound, other apps etc. If I happen to be typing (into any app - including Thunderbird - when this happens, input ceases, the cursor freezes and - if the problem persists for a second or two, Windows reports "[app] is not responding"

3. I cannot be certain, but I believe the problem occurs whilst messages are being retrieved.

This is a very serious problem as it means that I can never leave TB running as the problems it causes are not acceptable.

4. This means I cannot deal with incoming messages without periodically re-starting TB - which is an utter PIA.

I am running Win 11 Professional on a 2-year old machine with 64 Gb of memory. I have run TB in Troubleshoot mode, I have confirmed that the problem occurs regardless or whatever other apps are running (or none) and I have proven conclusively that no other app causes any kind of similar problem.

Looking forward yto hearing if others have had the same issue and what can be done about it.

Hello,

I have been using Thunderbird only occasionally for backing up Google emails after which I delete the emails from Google. I am thinking of using Thunderbird permanently but there are things I'm not sure about.

1). Does Thunderbird automatically integrate Google Take Out mbox files automatically into one email list? When I start Thunderbird, I see files that I have uploaded to Thunderbird (on two occasions in the past and these were mbox files from Google Take Out) but these files are empty. (screenshot attached). When I select the "all mail" folder all of the mails saved since 2005 appear to be there.

2). Does Thunderbird save attachments or only the emails themselves?

I would be grateful for some help so that I can optimise my working with Thunderbird.

Best wishes

DanZ

For the life of me I can't understand the options in View>Folders. The folders in my 3 accounts are sorted differently. In all 3 accounts I simply want 4 folders visible: Inbox, Sent, Spam and Trash. I've already tagged them as 'Favorite Folders' Making selections in the - View>Folders is very confusing for me. Why are there 2 Favorite folders in the list??

James

Had a double disaster, both OS partially upgraded at same time due to space issues and had to wipe and install.

Ended up with a TB install in Ubuntu where 2025 emails are missing. (see image #1) Found out that my backup should have most of them. (see image #2)

How do I safely identify the 2025 mail content in my backup folder, and how do I safely copy them over to the existing set up?

I see that the 933 profile exists in both so most likely it should be one of the lower number profiles in backup I need.

Attached are images of folder content.

Many thanks in advance!

I have everything I need from my old machine except my e-mail filters. If I copy the whole profile I will lose all of the sent messages and saved messages I have generated since I got Thunderbird up and running on my new machine.

I have recently installed Thunderbird to help me with my overfull Yahoo account. I installed it using the default Yahoo authentication which seems to work fine. Since Yahoo exposes at most 100,000 messages in any one mail folder, and my inbox had over 250,000, my goal is to spread those out amongst a few different folders so that I can manage the inbox more effectively offline. To that end, I set up a couple of saved search folders, each of which selects e-mails within a two-year date range. Incidentally, each only selects about 1,000 messages at a time, not the 40,000 or so each of those time periods seem to contain. When I use my Ctrl-A shortcut to select the messages in one of the 'search' folders, then move those messages to my Yahoo mail folder under my e-mail account, the messages initially are wiped from the saved search folder, but after a few minutes they all return!

Incidentally, the saved search folder has the same name as the folder I'm trying to copy the messages to, but the search folder is under the Inbox, and the other folder is 'beside' (not under) the Inbox.

Let me know if there is a more efficient and effective way of doing what I want. Ultimately, I want well under 100,000 messages in my Inbox.

Thank you

When I delete mails they remain in the Gmail All Mails folder. I have set the setting to move deleted messages to Trash (attached) and I always Empty the Trash manually. In All Mail all the deleted mails are present. In the attached screendump from Gmail webmail it is the mails without any labels in front. (I have unsubscribed to All Mails in TB, but previously these messages would show up as only present i All Mail when searched in TB). Is there a synchronization problem? I have noted that there are two Trash folders in Gmail webmail: 1. in:trash (where Gmail webmail is putting deleted mails which do NOT show up in All Mails) and 2. label:[imap]-trash (where TB is putting deleted mails which DO show up in All Mails). Is that the problem?

Additional question: is there an easy way to permanently delete the mails without label i All Mails?

Mail filters for custom headers like List-Unsubscribe, Authentication-Results or Received-SPF copying messages from IMAP accounts to Local Folders do not work on the Yahoo! IMAP account. For example:

filter1.jpg: name="_Inbox2: List-Unsubscribe <https" enabled="yes" type="17" action="Copy to folder" actionValue="mailbox://nobody@Local%20Folders/Inbox/_Inbox2" action="Stop execution" condition="OR (\"list-unsubscribe\",contains,<https)" (should copy messages from IMAP folders to _Inbox 2 on Local Folders)

filter2.jpg: name="Spam: Authentication-Results dkim=unknown | Received-SPF fail | X-Antivirus-Status Infected" enabled="yes" type="17" action="Copy to folder" actionValue="mailbox://nobody@Local%20Folders/Junk" action="Stop execution" condition="OR (\"authentication-results\",contains,dkim=unknown) OR (\"authentication-results\",contains,dkim=perm_fail) OR (\"authentication-results\",contains,dkim=none) OR (\"received-spf\",begins with,fail) OR (\"received-spf\",begins with,softfail) OR (\"received-spf\",begins with,none) OR (\"x-antivirus-status\",is,Infected)" (should copy messages from IMAP folders to _Inbox 2 on Local Folders)

But filter3.jpg works well: name="Inbox" enabled="yes" type="17" action="Copy to folder" actionValue="mailbox://nobody@Local%20Folders/Inbox" condition="OR (subject,doesn't contain,t[k\6iq69pd+}'cr)" (copies all remaining messages from IMAP folders to Inbox on Local Folders)

(the snippets above are fragments of the msgFilterRules.dat file)

Filters1 and 2 work well on other IMAP accouns, like for example wp.pl. So this is about Yahoo or something is corrupted. My question is, what wrong is here ? And by the way - how to create filter copying all messages from IMAP to Local Folders ? Is better way then filter3 looking for random string in the subject or somewhere else ? Thank you.

When I go to set a custom time for when an event's reminder will happen, it doesn't matter what date or time I put, when I click OK, it sets the date to be today, and the time to the next hour, if I use the date and time picker dropdown thing (clicking the arrow instead of typing it in), the date does set correctly, but the time is impossible to set even like that

Video

Hi All,

I have been working with a new service provider to move my domain and Email service for the past week. The domain move wasn’t an issue, but migrating Email has been a major pain. The new service technical staff had numerous issues just accessing the Outlook account, so copying the inbox and folders turned into a nightmare. Then I installed Office 365, just to access Outlook, and create PST files, which I provided to the new service tech staff, to synchronize all folders, but most of the PST files didn’t end up in the new server.

So, in Thunderbird I created an account for the Outlook service, and that synchronized everything, and was ecstatic! I then attempted to change the correctly synchronized Outlook account on Thunderbird, to the new IMAP server, but I can’t figure out how to change from the Microsoft Exchange Mail Server, to the new IMAP server. Since the Email Addresses on both servers will be the same, and only change with the DNS update to point to the new server, I am unable to create an IMAP account on Thunderbird, along side the Outlook account.

I am at a loss as to what I can do at this point. Can anyone help?