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When you are viewing an email, you used to be able to just left-click on the sender's address in the top left corner and a drop-down menu would allow you to copy the sender's email address (to use in creating a filter, for instance). That no longer works. Left-clicking or right-clicking does nothing. I have resorted to clicking to forward the message then copying the email address from the body of the forwarded email, then deleting the email. Is this an bug in Thunderbird, or did they remove this convenient menu?

I quite often get this message, though it tends not to be a problem later "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox"

One of the solutions seems to be Compact a File. How do I do this?

When setting up a POP3 account on Thunderbird, there is the option to preserve the messages on the POP3 server "Until I delete them". There are two stages of "deletion" in Thunderbird: the first when you delete a message from your Inbox folder and the second when you delete it from the Trash folder. Which of these two causes the message to be deleted on the POP3 server?

FYI: When on vacation I want to use the Android version of Thunderbird on the tablet I'm taking along. While away, I want to preserve important messages (so they'll still be there when I get back home) and delete the unimportant ones (so that I don't have to reread them when I get home). What I want is a repository (e.g. Trash) where I can retain the important messages so that they don't increasingly clutter the Inbox on my tablet during my vacation. My ideal scenario is that a message moved to Trash is retained on the POP3 server, but messages deleted from Trash are deleted from the server.

I have suddenly lost access to my emails on my desktop, though I can still access them on my tablet. When I open my emails, I get this message: The current operation on 'Inbox' did not succeed. The mail server for account jmquayle@protonmail.com responded: Mailbox INBOX does not

I can't see the rest of the massage.

How do I resolve this problem?

Hello, I opened up Thunderbird and it said it was downloading 28 messages but they don't show up in my inbox. I went online to log in to my email that way and the messages were downloaded. I check the trash in Thunderbird, they aren't there. The time stamp stops at 9:23am this morning and picks up with one message at 1:05 that I received after the 28 went missing. Any ideas where they might have gone? Thank you so much!

Just what it says. Using the latest version of Thunderbird on Windows 11 Pro.

I have had my usa.net account use the same IMAP settings forever; I double-checked my settings and they are correct.

Now, I get a LOT of email on that account -- I typically download it when I hit 10K messages. This usually isn't a problem.

I tried moving all of my current Inbox (already in TBird) to my archives. I was then able to download about 1K messages and then it stalled downloading. Said I either didn't have write access to the disk or had a file permission. I'm not seeing anything on the web interface for usa.net on this.

Now, I have 3 other IMAP accounts on T-bird -- 1 is never used (default from my ISP), a 2nd is very light traffic (mostly I stick with that email provider because they are small and still have private shell accounts) and the 3rd is my business vanity domain--high traffic but not the same as usa.net (where I get ALL my receipts for any online purchases, daily newsletters, help forums, etc).

Any idea what may be going on? Please be kind; I am not a programmer, just a more tech-savvy than the average bear (as in if IT is busy at work people ask me for regular stuff).

If any more info/filedump stuff is needed to see what's going on, please do let me know and I will tag it up asap.

Thanks again, community!

I like to setup a bulk email where it would make send. Is there way I can add all emails in the collection address without having to go to all of them.

i attached the address book. So when I open a new message. How can I ensure all collected address are grabbed to the BCC field?

Dzień dobry, mam problem z wiadomościami przeniesionymi do folderu lokalnego umieszczonego na serwerze firmowym. W folderach widoczne są tylko tematy, natomiast po kliknięciu w wiadomość jej treść jest niewidoczna.

Wiadomość po przeniesieniu do głównego folderu odebrane jest ponownie widoczna.

Co może być przyczyną?

A handful of messages are now coming through without showing the sender or subject line, and they are gobbledygook, like this portion of one from the Red Cross confirming an appointment; I have received messages from them a few months ago the last time I donated blood without any problem. Here is a portion of the message:

List-Unsubscribe .

<https://cell0.track.email.us-ashburn-1.oci.oraclecloud.com/20221014/track/unsubscribe?V=10&H=AAF_T7gjJrNsjijurS-kfbIUCRPnn3EoO2sYMe3LGVkIjjXu1CH0Ik4_iJVNvnLQEsxGSA-oVCn2jNrKI3On1lfWycmfmCPXzO6HtCGk_0hAOAJWSd7OJG7CVkgJESQfVj0puMNXNwufEosw_6YW-n7pBMyt3QLN3Nmmbk7eC0cD9hdELv3luw8a3tGBEDdlPwrp8bNrBQO4emF5qGFBjjXKG3DDY-e178He05LCvQGPRou1SskY4BJSyWPJLTxAkKAkmnykSEo1iiBqO5lW5flJqKcXQi-FirtD4gUSv9BDJTc3g3LStX6LclnaEff2Ygt0rc1JClzu7ygZaEXyvqAOyjG7252Z9_KEpXDVFg563dnbxfufD7DFYgEVS-jfSD2npEry9vuqTfVuQMmdwQu4pQwh20NoW9NwfaxYnQ>

List-Unsubscribe-Post: List-Unsubscribe=One-Click Message-id:

<0T0X00LRSW6HHYW0@submit-ad1-fd1-302-us-ashburn-1.rmtaad1.vcndpiad.oraclevcn.com>

MIME-version: 1.0 Content-transfer-encoding: 7bit Content-type: text/html; charset="UTF-8" Date: 13 Aug 2025 10:54:17 -0500 From: American Red Cross <donotreply@notifications.redcrossblood.org> Subject: Donation Appointment Confirmation To: jan@davejan.net X-Mailer: Siebel CRM X-MSMail-priority: Normal X-Priority: 3 Reporting-Meta:

AAGKGtGpCWlbT0fnexkvxRAbd1I5Lz7F74pMsIlZDlBlSZ34pwkbQnUGnY2SNU+H
5vRUl+q0fNzmzp04zoutIuSiiasywHE5nVQ0wiLfJrpxHJObPm3Jx3WVtVmJM9Kl

I frequently get the error message:

"Message was sent but copy was not placed in your Sent Folder due to network or file access errors."

How do I fix this? Is it something to do with a recently installed Norton 360 application?

Thanks

Since last night my emails in 3 accounts won't send in thunderbird. I get the following message

the message could note be sent because connecting to the outgoing server SMTP mail.optusnet.com.au failed. The server maybe unavailable or is refusing SMTP connections. Please verify that your outgoing server (SMTP) is correct and try again.

The provider Optus has confirmed it doesn't have any issues.

Is there a problem with this with Windows 11 which i have just downloaded 5 days ago?

Does anyone have any suggestions?

Hello, Attached are the messages I have been receiving ever since 6 October 2025. I've tried to read about fixing these myself, to no avail. (I mean, I can Read; I just can't fix this.) I've tried to Compact ALL folders individually. But that seemed to do nothing. (Before 6 October, the Thunderbird window would at least "flicker" a little after compact.) Trash is empty. Tried disabling McAfee AntiVirus & Firewall. And, no, this isn't happening because I'm using McAfee; I've been using McAfee since Windows XP and Thunderbird since before it "broke away" from Mozilla. They have, until 6 October, played nice together. I really like Thunderbird so I do not want to find another email client/program/what-have-you. There are LOTS of saved emails that I cannot move/copy to "save space", so...Help? Please?

Thanking you in advance, tonyg

P.S.-I am not computer illiterate. But, slow, easy to follow, non-BIOS changing, step by step directions would be preferred.

I have over 293K inbox emails. I recently received the notice from Yahoo that storage is being reduced to 20 GB. I would like to use Thunderbird to download all of my emails. However it i is showing only 10,000 inbox emails. What do I need to do such that all of my Yahoo Mailinbox emails are displayed in Thunderbird?

peter.lerche@mail.dk My internet service provider, YouSee, removed my access to Thunderbird for a couple of days - then restored it. However with the result that my laptop can receive and send emails, my PC can receive but not send, and my phone can neither receive nor send.

YouSee claims that everything looks OK from their side, and that any correction is up to Thunderbird.

Can you possibly help me?

Peter Lerche

Had this problem suddenly crop up since the update of one of my accounts not sending mail due to timeouts. I've not changed any passwords or settings since I had it working last. The message is the "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) [my workplace's SMTP server] timed out. Try again." one, and it's preventing me from sending any emails.

Specifics:

• It's one account (my work one: work runs an Outlook/Microsoft mail server).
• My personal account (gmail) sends fine. Both accounts recieve email fine too, so this is just one direction on one account.

Things I've tried:

• Switching my Firewall off makes no difference, so it's not a firewall problem
• It's not that the emails I'm trying to send are too large, one word test emails also don't send
• Extending the timeout time by 3x doesn't help

I also opened a second computer not yet running the latest version - the account worked fine. Then applied the upgrade and that broke things in exactly the same way as described above. So I'm pretty sure this is an issue caused by the upgrade in some way. Not sure if other people with Outlook servers are having the same problem or if there's any workaround available but would appreciate advice.

I am sending myself information I want to view later in the way of a clickable link with my cell phone. However, those received emails that have a hyperlink in them via my Gmail account are not clickable to open. What is the rocket science to make this work by default?

I can choose view message body as plain text and then the link becomes clickable but when I click on it nothing happens, it goes nowhere.

I have my browser set to default but I don't know if there's additional settings within that affect this.

Any help sure would be appreciated.

Suddenly I am not receiving emails from my church and financial advisors (especially daily and weekly newsletters). They are NOT going into spam; I'm stumped. Appreciate your help.