Thunderbird Community Forum

hi :-)

My Thunderbird uses between 19 and 34 GB of RAM. It's cyclical (with a period of about 10 minutes).

What do you suggest?

Do I need to perform a performance diagnostic? https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance

Do I need to follow all the steps listed on https://wiki.mozilla.org/Thunderbird:Testing:Memory_Usage_Problems#Diagnosis_Steps, or can I skip some of them?

Hi All,

Thuderbird 140.12.0esr (aarch64)

iMac 24Gb M4 Chip macOS Tahoe 26.4

When I request a search through Unified Folders Inbox for 10 email addresses using Quick Filter, CPU goes to 80% or more, and response is 10-15 seconds. Main search appears to be ok. Only add-on was a printer service but has been disabled and problem still remains. In troubleshooting mode, search still causes high CPU, even though I can only search one email address. Just started about 2-3 days ago (around 17-18 June).

Any ideas?

Thanks.

receives no email. sends no email. my server received many emails since then. everything else seems to work. it is not my server as I have Outlook, which received the emails. Only thunderbird is locked-up.

When I try to delete mail from Deleted folder (even if there is just 1 email), the thuderbird gets unresponsive. Same when i try to select few emails (headers) for deletion or moving to another folder. Running on Windows 11

I have a new laptop and installed Thunderbird. It shows lots of messages in all the folders, but will not show any messages in the message screen. It just continues to show the opening logo

It says that the folder is in use by some other operation. I tried a Force Quit and a restart and neither worked. Please help.

His OS is 10.13 and his TB is 115.18.0. He kept the old Mini because he was running an ancient version of Photoshop that ran a plugin that is not available for Adobe Creative Cloud.

Robert was a sculptor who did large kinetic work and much of his work is still on that computer.

I am still getting his email on my iPhone, so I don't know what is going on. Unfortunately, I haven't saved his email history on my iPhone so when someone answered a similar problem a couple of years ago, the only place that email would reside is in Robert's inbox on his Mini, which I can't open.

Many thanks for your help.

Ellen

I own two computers running MacOS 10.15.7 Catalina and have Thunderbird installed on both. Until rather recently, the Thunderbird version was 140.8.1. Then I noted that it was impossible to send e-mails, and soon discovered that the cause was outdated server settings. They could not handle office365, so I installed Thunderbird 148.01 and changed to settings that should be able to do so. This worked very well on one of the computers, the one which has a fast (SSD) hard drive, but not on the other that has a slow (non-SSD) drive. The error message that I get with the slow computer is, surprisingly, the same as I got with the older Thunderbird. But I suspect that the real cause is some kind of timed-out process.

If any of you could explain what happens and tell me what to do, I would be very happy. Maybe I should choose a Thunderbird version somehere between 140 and 148?

Helge Malmgren

Whenever I do anything with email I get a message "not responding" which causes a delay for a few minutes before it proceeds This occurs with almost every action Open email, delete email, browse a different folder (eg Inbox to Sent) it suddenly started happening yesterday

I have a Postfix/Dovecot server that hosts 10 of my domains from one IP.

When you open Thunderbird, it checks the domains you have preset. I have two. This happens immediately, especially if there is no new mail on the server. Everything works fine.

If you have other domain mailboxes open, and I have eight more, and you click the inbox on each one, Thunderbird stalls at the fifth mailbox, regardless of the inboxes' selected order.

tail -f /var/log/mail.log - confirms this.

I have reset or modified everything I can think of. My server is not throttling Dovecot.

This must be something internal to Thunderbird, possibly related to only using a specific mail server IP for all domains.

Google AI suggests assigning a unique local IP alias to each domain on my server so Thunderbird thinks it’s talking to 10 different machines. This seems extreme.

Any solutions?

Hi , I am using the MacBook Pro M5 which is running with macOS Tahoe 26.5 . I have installed Thunderbird mail with version 150.0.2 . After the initial installation with only one account with few mails in the inbox I found the App opening time is abnormally high & is more than 1 minutes . I have removed the mail App few times & re installed it ( even I have re download the app from net again) , but the problem remain same .

I have removed the old folder & files from - ~/Library/Thunderbird/ , ~/Library/Application Support/Thunderbird/ , ~/Library/Caches/Thunderbird/ , org.mozilla.thunderbird from ~/Library/Preferences/. before the re installation & re started the laptop , but no improvement in results .

Also in mail setting references → Unchecked the option - Enable Global Search and Indexer Disable all Extensions and Themes under Tools → Add‑ons & Themes (No Extensions is installed) .

Just to inform that the apple mail is working fine in this laptop .

After all the above trails the results are same , the app once quit & re start - it takes around 1.5 minutes to open after which the app works normally with out any problem . Please suggest if any solution is available for this problem . Best Regards Gautam Banerjee

We are facing issues with Thunderbird mail application.

Incoming emails are not being received in Thunderbird. Thunderbird is running very slowly and frequently becomes unresponsive. Sending and receiving emails is taking a long time. We have already restarted the application and system, but the issue still persists.

Kindly check the mail server settings and Thunderbird configuration from your end and advise on the necessary action to resolve this issue as soon as possible.

Your prompt support will be highly appreciated.

At the start of last week Thunderbird started to be very laggy to the point it is almost unusable.

It was after the update to version 151. Running on MacOS Sequoia

I have tried a number of remedies to try and resolve the issue:

• Compacting mail folders
• Repairing mailboxes
• Clearing the cache
• Rebuilding the search index
• Restarting in trouble shooting mode (this caused Thunderbird to hang)
• I also tried installing the daily build release to see if the issue was resolved

None of the actions above solved the problem. I would very much appreciate any help or experience others have had.

Z.

Unable to open NEW Email on one click. i need to wait for 4-5 mins to open that email. even i am not able to open on one click which contains Barcode. which email contain barcode its also not reflecting in email and even i need to wait for 4-5 mins to open that email.

Kindly help me for this matter i need to change any settings.

For some time now, TB (147.0.1 (64-bit)) has been VERY slow loading, the first thing in the morning. If I close it and re-open, it opens at the normal--and desirable!--speed. Any thoughts? Regards, Dave

Good afternoon!

We use Thunderbird for our business across several computers. However, on the main computer, we've suddenly received blank tabs at the top of the page, as if an open email thread is there. There are about ten or so of these blank open tabs, and you cannot exit them. The X button doesn't work on them, nor does Ctrl + W.

I've uninstalled and reinstalled the software, and we've tried a shutting everything down and restarting the computer, but nothing seems to get rid of the tabs.

Is this an issue others have experienced and, if so, what's the best remedy for it?

Thanks in advance!

I've been using TB for years. Lately I can be browsing the Inbox when the contents will disappear and I get a message saying something like no messages found. After about 30 seconds the Inbox is displayed again.

TB never used to do this and it is similar to Firefox refreshing the screen which it also never used to do this.

Also how do I get from the Beta version to the standard version?