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I have used thunderbird now for about 6 years, for all my website accounts. During that time I have had very few problems, about 9 months ago I started using Windows 8, I transferred all my accounts from my old machines running on XP pro to new machines running Win 8 and thunderbird ran ok. I have auto updates running so I am assuming both thunderbird and windows are updating whenever! About 4 weeks ago I started experiencing major problems with Thunderbird, it would start then freeze, then it would start again then freeze, if I ran it in safe mode it would work for a while. Now it opens and freezes, the message at the top just says ' Thunderbird is not responding'. Even in safe mode now it will not work! I have tried uninstalling and re-installing, I have even tried installing an earlier version of Thunderbird, I Have deleted the profile and forced it to produce a new one, I have spent hours trawling different sites trying to find an answer, and you know what, the only conclusion I could come to was, nobody seems to care whether this problem is solved or not, so reluctantly I have had to give up and I moved all my accounts to Outlook, which works perfectly with Windows 8.1. I think that should have been the answer, right from the start of the problem!

get the words 'not responding' whenever I try to do mostly anything. Open mail, etc...This just started in the last 4-5 days. Tried rebooting..but after 1-2 minutes..same thing.

I run Win7. Very frequently in TB's lower left corner, it shows that messages are downloading. Recently the download time has lengthened appreciably, even when the message does not contain attachments. Also moving from one message to the other takes considerable time. Since this started three days ago, I have uninstalled any programs added in that period. MalwareBytes' scan run daily has no malware. Also have uninstalled the anti-spam on my McAfee a/v.

Any other suggestions on why this might occur?

For the last few days, whenever I try to select an email message, it takes at least 45 seconds to a minute to load the message. (Either in a pop up screen or the integrated window)

General functionality of the program is slow as well, when attempting to send, or compact files, etc.

The program is up to date, please help.

I can't send or receive emails. Most other functions work ie: search, move, tag etc. My email is excite. It works ok from my browser. I am using Windows Vista. I have copied everythin in the troubleshooting information tab. It is as follows:

 WARNING:
 This contains sensitive information which shouldn't be forwarded or published without permission.

 Application Basics

   Name: Thunderbird
   Version: 24.4.0
   User Agent: Mozilla/5.0 (Windows NT 6.0; rv:24.0) Gecko/20100101 Thunderbird/24.4.0
   Profile Folder: C:\Users\Art\AppData\Roaming\Thunderbird\Profiles\vf2zd715.default
             (Local drive)
   Application Build ID: 20140316131045
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Crash Reports: about:crashes
   Memory Use: about:memory

 Mail and News Accounts
   account1:
     INCOMING: account1, APerrone@excite.com, (imap) imap.excite.com:143, alwaysSTARTTLS, passwordCleartext
     OUTGOING: smtp.excite.com:587, alwaysSTARTTLS, passwordCleartext, true

   account2:
     INCOMING: account2, Local Folders, (none) Local Folders, plain, passwordCleartext

 Extensions

 Important Modified Preferences

   Name: Value

     browser.cache.disk.capacity: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     browser.cache.disk.smart_size_cached_value: 358400
     dom.max_chrome_script_run_time: 0
     extensions.lastAppVersion: 24.4.0
     font.internaluseonly.changed: false
     font.name.monospace.el: Consolas
     font.name.monospace.tr: Consolas
     font.name.monospace.x-baltic: Consolas
     font.name.monospace.x-central-euro: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.tr: Calibri
     font.name.sans-serif.x-baltic: Calibri
     font.name.sans-serif.x-central-euro: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.sans-serif.x-western: Calibri
     font.name.serif.el: Cambria
     font.name.serif.tr: Cambria
     font.name.serif.x-baltic: Cambria
     font.name.serif.x-central-euro: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.tr: 14
     font.size.fixed.x-baltic: 14
     font.size.fixed.x-central-euro: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 14
     font.size.variable.el: 17
     font.size.variable.tr: 17
     font.size.variable.x-baltic: 17
     font.size.variable.x-central-euro: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 17
     gfx.blacklist.suggested-driver-version: 257.21
     mail.openMessageBehavior.version: 1
     mail.winsearch.enable: true
     mail.winsearch.firstRunDone: true
     mail.winsearch.global_reindex_time: 1294975257
     mailnews.database.global.datastore.id: 87959335-b5c6-48a7-a241-a31cf62f6e4
     network.cookie.prefsMigrated: true
     places.database.lastMaintenance: 1397523192
     places.history.expiration.transient_current_max_pages: 53627
     places.history.expiration.transient_optimal_database_size: 85802188
     plugin.importedState: true
     plugin.state.flash: 0
     plugin.state.java: 2
     plugin.state.npctrl: 0
     plugin.state.npdeployjava: 1
     plugin.state.npdlplugin: 0
     plugin.state.npgoogleupdate: 0
     plugin.state.npolw: 2
     plugin.state.nppdf: 2
     plugin.state.nppl: 0
     plugin.state.npqtplugin: 0
     plugin.state.nprhapengine: 0
     plugin.state.nprndlchromebrowserrecordext: 0
     plugin.state.nprndlhtml5videoshim: 0
     plugin.state.nprndlpepperflashvideoshim: 0
     plugin.state.nprpplugin: 0
     plugin.state.npwlpg: 0
     plugin.state.npwpf: 0
            privacy.donottrackheader.enabled: true

 Graphics

     Adapter Description: NVIDIA GeForce 8600M GS
     Vendor ID: 0x10de
     Device ID: 0x0425
     Adapter RAM: 256
     Adapter Drivers: nvd3dum nvwgf2um
     Driver Version: 7.15.11.7713
     Driver Date: 12-3-2008
     Direct2D Enabled: Blocked for your graphics driver version. Try updating your graphics driver to version 257.21 or newer.
     DirectWrite Enabled: false (7.0.6002.23200)
     ClearType Parameters: ClearType parameters not found
     WebGL Renderer: Blocked for your graphics driver version. Try updating your graphics driver to version 257.21 or newer.
     GPU Accelerated Windows: 0. Blocked for your graphics driver version. Try updating your graphics driver to version 257.21 or newer.

     AzureCanvasBackend: skia
     AzureFallbackCanvasBackend: cairo
     AzureContentBackend: none

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 1
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.10.2
     4.10.2

     NSS
     3.15.4 Basic ECC
     3.15.4 Basic ECC

     NSS Util
     3.15.4
     3.15.4

     NSS SSL
     3.15.4 Basic ECC
     3.15.4 Basic ECC

     NSS S/MIME
     3.15.4 Basic ECC
     3.15.4 Basic ECC

When "Real-Time Scanning" is running, Thunderbird goes to "not responding" for a minute or so and CPU usage often goes to 100 %. If I turn off "Real-Time Scanning" TB seems to work okay, but I expect I am vulnerable to viruses. This problem has been going on for a couple of weeks.

I used to use "Avira" with no problems but McAfee is provided "free" to subscribers.

I am running Windows 8.1 and Thunderbird 24.4.0 and I am unable to print from Thunderbird. When I choose: File - Print, nothing prints and I get no error messsage. When I choose: File - Print Preview, I get "An error occurred while printing" message and nothing prints.

I am using 24.4 Windows 7. My online account only has one copy of each email. All my other devices with Thunderbird on them work fine. This has been happening since April 3. I use avasti. I am so tired of deleting and would appreciate help. It is discouraging that I cannot contact Mozilla Thunderbird directly.

Thanks for any suggestions Susan

I use a vpn to mask my IP address. When I am connected through my VPN I cannot send emails from my gmail or yahoo accounts through thunderbird If i disconect vpn they go through fine

Dear Friends,

I can Email my wife at [elainefraser43@hotmail.co.uk] from my Gmail account:

I can Email myself [ralphfraser1@talktalk.net], which is on "Thunderbird", from her Hotmail account:

BUT, when I attempt to Email HER via "Thunderbird" my Emails are rejected, and I get the above-mentioned Unknown address error 550-"SC-002 [COLO-MC3-F42] failure message!!

This is all WELL above my head!!

Please can you explain what needs to be done here???

Regards,

Ralph Fraser

Thunderbird keeps freezing. I can open it. Send and receive mail but very quickly it freezes up and I have the cursor swirling then at top it will say Thunderbird not responding and program asks to close. Uninstall/re install failed. McAfee and adaware show nothing. Please help!

environment: macbook pro early 2011 os mavericks 10.9.2 thunderbird v29.0 I have multiple IMAP and POP accounts

Since the previous release of T-B autocomplete no longer suggests names. In addition, the name filed defaults to a red colour type font, and I also notice I have 5 separate instances of personal address book, collected address book and MAC OS X address book....

Help pls!

Thanks

This is now the 3rd profile I've created to get help. 1st profile required confirmation of email before a reply. That's stupid when I can't get in my email to begin with! 2nd profile I stupidly gave wrong email address to my working 2nd account. 3rd profile corrected that. So, can't get in my email. Message shows above. Deleted global thing as suggested by help. Nothing. What do I do now?

Thunderbird keeps hanging and displaying "a script on the page may be busy..." with the above message. I thought that the latest update would fix the problem but it seems to have made it worse. My system is W7 64BitUltimate with SP1. It has 8GB of RAM.

What could be the problem?

 Application Basics

   Name: Thunderbird
   Version: 24.5.0
   User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

I am on Thunderbird 29.0 - got upgraded to a beta version unintentionally.

Now, when I start typing in an address when writing an email no names pop up, even though the beginning letters clearly refer to an address or name in my address book. Every email address has to be typed in from scratch. only red letters appear. Problem.

Hi. On Windows 7 with classic theme Thunderbird problem in ProgressBar. Video-screen: http://www.youtube.com/watch?v=FTWBXfikdGA

I use Thunderbird Mail Services, version 24.5.0. Under Thunderbird, I have 3 email addresses. Two work fine; they are POP. The 3rd one is aim.com email which is IMAP. Suddenly, last Friday, 5/2/14, I began getting an error message everytime I tried to send out an email. I could still received emails, but not reply or send. The error code was 550 5.7.1 which apparently relates to authentication. I have contacted AOL (aim.com provider) and Comcast, my outgoing server. All is well with both of these entities. Therefore I've come to the conclusion this must be a Thunderbird problem. Per the internet, it is possibly a DMARC problem. Can anyone shed any light on this? I really need to fix this problem as this is my default personal mail address. Thanks!

I have a couple of email accounts set up and one of the accounts is horribly slow when I try to read the messages in the inbox. This is the only folder that is slow, and it happens with new or old messages. I have archived old messages, compacted the folders, etc. with no difference. I have also tried restarting Thunderbird in safe mode. I am running the latest version on Windows 7. Please help!