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Microsoft 365 SMTP server intermittently rejecting connections

I've been running Tbird on Windows for many years. About 2 weeks ago something changed, either in Tbird or at Microsoft, which stops me from sending to the Office 365 SMT… (read more)

I've been running Tbird on Windows for many years. About 2 weeks ago something changed, either in Tbird or at Microsoft, which stops me from sending to the Office 365 SMTP server. I can send and receive using Outlook on the Office website, but I can't send locally from Tbird. Error message screenshot herewith. I have tried every possible permutation of server settings, which currently are:

Server name: smtp.office365.com Port: 587 Security: START/TLS Authentication: OAuth2

MS support says these are correct, and they are at wits' end to understand what is going on. They asked me to ask Tbird support, so I am.

I should add that at about the same time I started getting SMTP rejections in Gmail on my Android phone, and miraculously that was corrected yesterday, without any action from me. There is something odd going on at Microsoft - does anyone know what it is? My other accounts on Tbird work fine of course.

Asked by lesrose1959 2 years ago

Answered by gp 2 years ago

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The size and content of the profiles file

Can anyone let me know the 'shape' of a correct profiles file. I have a relatively small number of emails in the system (perhaps 1000 or so??) but my profiles file is a g… (read more)

Can anyone let me know the 'shape' of a correct profiles file. I have a relatively small number of emails in the system (perhaps 1000 or so??) but my profiles file is a gigantic 4.5Gby with 63k files in 83 folders. I feel this can't be right. There are hundrends of 'mini files' that are meaningless to me. This large file seems to be giving Tundebird indegestion at times when it says that it can't transfer a file from one folder to aother. I guess I could scrap it and start again but that would obviously mean l lose all my emails and addresses. Is there any way to 'clean' the profiles file and reduce the size. The compact facility doesn't seem to do this for me.

Thanks, Terry

Asked by registration33 11 months ago

Last reply by registration33 10 months ago

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Can't send email after every new version of thunderbird downloaded

Every time I download new version of thunderbird I suddenly cannot send emails, I can receive fine. It's so maddening ughh Once this happens I spend many hours searching … (read more)

Every time I download new version of thunderbird I suddenly cannot send emails, I can receive fine. It's so maddening ughh Once this happens I spend many hours searching support and it takes forever to find the answer. Some times it's a simple server setting change is the fix or adding @.... after the username but now this is not working

Please please help

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4003a.ext.cloudfilter.net cmsmtp 138.199.21.216 is listed on Cloudmark CSI-Global. Please visit:// https AUP#IPBL100

My settings are: SMTP port 587 starttls normal password

Server serrings pop.shaw.ca port 995 ssl/tls normal password

Many thanks in advance

Asked by glassmancanada 2 years ago

Last reply by glassmancanada 1 year ago

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Is this profile recovery process safe ?

TB working fine, then next day opens up as Blank screen and a setup tab Profile shows to be still there as do mail folders .... so need to recreate profile. Created a n… (read more)

TB working fine, then next day opens up as Blank screen and a setup tab Profile shows to be still there as do mail folders .... so need to recreate profile.

Created a new Profile I copied over the folders:

 IMAPmail
 Mail

and the following files

 key3.db
 logins.json
 cert8.db

and all of the pref.js files (1 through to 141)

The profile folder does show new profile active ( as per this pic https://flic.kr/p/2pjRyRz)

I created the 2 IMAP account login details, I now have access to the inbox for 2 IMAP account, but I do not have any the filed mail (local folders) how do I get these back. This is an important item for me as many years of filed emails.

Asked by rick_hughes 12 months ago

Answered by rick_hughes 11 months ago

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In infinite loop of crash closing - after sorting emails by stars - (Urgent to me)

I was using thunderbird. I accidentally hit the sort by star right above the email list. The application crashed closed. When I reopen it, it immediately crash closes. I … (read more)

I was using thunderbird. I accidentally hit the sort by star right above the email list. The application crashed closed. When I reopen it, it immediately crash closes. I can't even get an pointer arrow for long enough to exit myself.

On window 10. Thunderbird was up to date.

Tried - restarting computer. Signing out of TB in the crash report box. Can't get into safe mode.

Asked by curls3 5 years ago

Answered by Toad-Hall 5 years ago

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Reverting from Thunderbird 'Upgrade' 115.2.2 (32 Bit) Supernova

How do I correct my serious error (when tired) in allowing a Thunderbird 'Upgrade' 115.2.2 (32 Bit) Supernova to install on my Laptop (Windows 10 Home, 64 Bit). I failed … (read more)

How do I correct my serious error (when tired) in allowing a Thunderbird 'Upgrade' 115.2.2 (32 Bit) Supernova to install on my Laptop (Windows 10 Home, 64 Bit). I failed to read the Release Notes by trusting Mozilla wouldn't issue such a drastic change without Warnings as it was not just an 'Upgrade'! It has screwed up my Set up, Folders etc., completely changed layout, can't find 'Write Message' tab etc. etc . etc.

The previous Thunderbird Version had many problems further introduced by 'Upgrades' but was at least still had continuity with earlier Versions with a functional MMI (man machine interface) instead of all the changes introduced with the 115.2.2, which in my opinion should be withdrawn completely. N.B My experience in Systems Control, as an Air Traffic Control Engineer, we would throw this out as not fit for purpose.

Help Please and explain how can I revert back to an Earlier Version?

Asked by 100percent 1 year ago

Last reply by Wayne Mery 1 year ago

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Thunderbird 115 - Not opening to Last message

Hi all, Just upgraded to Thunderbird 115(from the last Non beta version). I have multiple email accounts. When I click to the inbox off one of my gmail accounts it doe… (read more)

Hi all,

Just upgraded to Thunderbird 115(from the last Non beta version).

I have multiple email accounts.

When I click to the inbox off one of my gmail accounts it does not display to the last message received. Thunderbird opens to a message about 1/4 up into my inbox.

I have a second gmail account and this behavior does not occur.

I'm sure its a easy fix, I just can't figure it out .

James

Asked by hjauman 1 year ago

Last reply by tom427 11 months ago

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After a clean install windows 11, Thunderbird 102.1.2 doesn't check password.

Hello, I did a clean install windows 11 21H2, installed Thunderbird 102.1.1 and later 102.1.2 in the wizard i copyed my password and all the other info imap, after press… (read more)

Hello,

I did a clean install windows 11 21H2, installed Thunderbird 102.1.1 and later 102.1.2 in the wizard i copyed my password and all the other info imap, after pressing ready checking password keeps on checking noting happens.

My password is correct and also all the other setting.

Must be a bug in the program.

Asked by Erwin05 2 years ago

Last reply by Toad-Hall 1 year ago

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User authenticated but not connected when connecting to Microsoft email

Getting this message as of today when trying to connect to my Outlook/Microsoft Office 365 e-mail account. No change of password or any security settings were done. Googl… (read more)

Getting this message as of today when trying to connect to my Outlook/Microsoft Office 365 e-mail account. No change of password or any security settings were done. Googling for the error reveals plenty of other folks coming across it in Thunderbird but not one working fix. Plenty of TB blaming Microsoft and vice versa. IMAP access is still working on iOS so that does strongly suggest a Thunderbird side problem.

Please no "switch to a different email provider" proposed solutions that isn't helpful.

Asked by matthewab2001 1 year ago

Last reply by tim_mw 1 year ago

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Message field too narrow

The message field is too narrow for all messages, except pure text messages. A screenshot is attached. How can I modify the userChrome.css so that all available space ge… (read more)

The message field is too narrow for all messages, except pure text messages. A screenshot is attached. How can I modify the userChrome.css so that all available space gets used?

Asked by Thomas likes to learn 9 months ago

Last reply by Toad-Hall 9 months ago

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One Last Try before Bidding Goodbye to Thunderbird. And unable to unsubscribe gmail folders. Freezing and locking up PC for almost 3 years.

I have had the same issues with TB freezing and locking up my PC that many here have had. For me, this has now gone on for almost 3 years. I have done everything I can th… (read more)

I have had the same issues with TB freezing and locking up my PC that many here have had. For me, this has now gone on for almost 3 years. I have done everything I can think of, and everything I have read about online to deal with the constant freezing. I have: --upgraded countless times (now on Ver 102.9.0, 64 bit, Win 10, 32GB RAM, 3TB hard drive) --reinstalled Thunderbird many times --deleted various profiles and created new ones, deleted various config files as suggested. --reinstalled Windows 10, upgraded all associated files, drivers, etc. --started Windows in Safe Mode --disabled all add-ons and extensions in TB --reset all toolbars and controls in TB --started Thunderbird in Troubleshoot Mode --gave an exception to TB in my Windows Defender [and turned off Defender entirely] --ran MANY virus scans --disabled ALL virus software

Thunderbird is the ONLY piece of software on this PC that locks it up. It exhibits the same behavior that many here are seeing: freezes when I try to click on something; freezes when I try to reply to an email; freezes for no apparent reason. I can't MAKE it freeze up... it just seems to do it at random, constantly. Right now, it's open on another screen and has been frozen for about 3 minutes, and just unfroze. Most of the time, it freezes so that I cannot shut TB down. It is completely unresponsive. Sometimes it will freeze the computer so that I cannot do ANYTHING... I cannot open Task Manager and force a shutdown. Eventually, it releases and works again, only to freeze up a few minutes later.

I'm pretty much out of ideas, but I continue to browse online, looking for answers. As I said, three years of this is enough, and I see complaints about this going back even further. I love Thunderbird. I'm a longtime user and have not found any email client that comes close to the way TB works for me, so I'm VERY reluctant to leave. But I'm really tired of being a beta tester. And yes, I have donated many times over the years, and I'm happy to do so. I'm not concerned with the money. I just want it to work like it used to. If you have any fresh ideas, I'm very open to hearing them. But a warning, that I have likely already tried the fixes offered. I appreciate any input, in any event.

So, unless a miracle comes along, I reckon I'll have to cut bait and find a replacement for Thunderbird. Thanks for allowing me to blow off some long-held frustration.

best,

--john

Asked by johnegenes 1 year ago

Answered by johnegenes 1 year ago

  • Archived

Constant login pages, not displayed correctly, unable to sign into gmail

I am at a clomplete loss here and after hours of googling and frustration I just need someone who can help. - I purged all installation folders and paths, deleted profil… (read more)

I am at a clomplete loss here and after hours of googling and frustration I just need someone who can help.

- I purged all installation folders and paths, deleted profile and reinstalled Thunderbird 115.1.1 on absolutely (!) clean sheet, it is dead on and I inspected all versions and folders.

- I hoped that the version fixes my login issues, but if anything, they're worse and the logins don't last nearly as long as they used to.

- I am aware of the imap, smtp and tls configuration

- I am aware of the settings in gmail, also tried all combinations of oauth2, less secure apps, app password, I tried all of that

- tried enabling javascript manually, cookies, checking all local browsers, especially firefox browser and legacy IE options for anything that could be wrong

- I can set up and add my gmail accounts, usually once upon install. It will then work with no issue, receives and sends mails, loads all sub folders. It just won't stay.

- I can go to account/privacy and view and edit my passwords. I can enter the correct password there and the account itself works and loads mail. If I close and re-open TB, it's still fine. On the 4-5th time of opening and closing, it locks up and starts promting for sign in.

- I get logged out of one or multiple accounts and get promts to sign back in. These login page windows then cannot be interacted with, at all. They are not displayed correctly, the buttons are just dead and do not react or lead anywhere if I click. Some do the little brightness animation and recognize that I clicked, but nothing continues. I have no ability to enter or submit the gmail credentials in there.

- I tried navigating those with on-screen keyboard, CTRL +, also with scroll wheel etc., it cannot be resized or interacted with. Also changing the window and screen scaling size (100%/150%) does nothing, I also checked all actual browsers like firefox and chrome and they all have normal zoom, cache and cookie settings. Why is the login page not usable?

I know it would probably be fine after reinstall but I just cannot keep doing this. It does not last even a week. I even deleted the profile and re-setup everything several times already, it still comes up with login pages all the time. And if those are not usable then I cannot go forward.

This is all on a fresh Lenovo Thinkbook G15 that is nearly new. I have never seen software not work this vehemently. I have given all info that I have and all that I tried. Can someone please advise, I don't understand it anymore.

Asked by getrabelmu 1 year ago

Last reply by Wayne Mery 1 year ago

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thunderbird 104.2 opens as a blank window

After an update yesterday, thunderbird v104.2 opens up as a blank window. The menus show up and it seems to download messages, but I'm unable to see any folders or messa… (read more)

After an update yesterday, thunderbird v104.2 opens up as a blank window. The menus show up and it seems to download messages, but I'm unable to see any folders or messages. I've tried deleting the "global..." file, I've uninstalled and reinstalled an older version, and nothing is working for me. I've read other threads about this issue and tried the solutions, but have not found one that works for me. I'd appreciate any new ideas. I'm running on Windows10 thanks

Asked by lindsaywashere 2 years ago

Last reply by Wayne Mery 1 year ago

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Email tabs are blank

I keep several email tabs open that have topics I am currently working on with clients. Recently they have been turning blank, so I have no idea what they are--I feel I h… (read more)

I keep several email tabs open that have topics I am currently working on with clients. Recently they have been turning blank, so I have no idea what they are--I feel I have lost info that I need to do business. Why do they turn blank? I need this fixed ASAP!

Asked by eyeart 6 months ago

Last reply by fx40 1 month ago

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Cannot restart Thunderbird BETA after normal close

Start new Windows session. Start Thunderbird and works OK. Shut Thunderbird down and try to re-start during same Windows session and it will not launch. Reboot Windows an… (read more)

Start new Windows session. Start Thunderbird and works OK. Shut Thunderbird down and try to re-start during same Windows session and it will not launch. Reboot Windows and try to start Thunderbird and works OK. Alternatively, going into Task Manager there will be a number of Thunderbird processes running. If I manually end them all (while Thunderbird is NOT active) then I can restart as normal too. This all began with 124.0 Beta 1. Never had the issue prior.

Also, Thunderbird crashes if restarting within the app. By this I mean clicking the X it appears to close (excepting those persistent processes running) but "Restart Thunderbird" such as to launch Troubleshooting mode or from the "Restart to update Thunderbird" config crashes the app with 100% consistency.

Asked by Dudley Fuddpucker 9 months ago

Last reply by Wayne Mery 7 months ago

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Thunderbird 102.13.0 and Exquilla

Hello, I upgraded this morning TB to the latest version 102.13.0 but my account on office 365 is not working properly. I cannot forward messages anymore and the messages … (read more)

Hello, I upgraded this morning TB to the latest version 102.13.0 but my account on office 365 is not working properly. I cannot forward messages anymore and the messages that I send have no content.

I am using Exquilla for Microsoft exchange and there is something definitely wrong since the upgrade was done.

Can you support urgently?

Best regards,

Fadi

Asked by fkhoneis 1 year ago

Last reply by Wayne Mery 1 year ago

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Can I "Unburden" Thunderbird?

I have a very small Tablet computer and Thunderbird is really bogged down on it. The tablet has a 32 bit processor, 1G RAM, 64G SD drive. (1) When I run TB I get many "no… (read more)

I have a very small Tablet computer and Thunderbird is really bogged down on it. The tablet has a 32 bit processor, 1G RAM, 64G SD drive. (1) When I run TB I get many "not responding" messages from Windows. (2) Maybe 1/2 the time, if I "delete" a message the screen will freeze on the message. The message is removed from the inbox list. I have to click "X" to get rid of that screen. (3) Get Messages no longer works. When I click it, nothing happens. The status bar at the bottom remains on the last information displayed. I found that if I use View, Folders, All, I can bump TB to get messages. (Normally I use Unified Folders) The status bar will display each of the accounts it is checking and any new messages will appear. These things have been happening through many many versions of TB. Although #3 seemed fixed a few weeks ago but has returned. Same for #2.

I looked at the disk space that TB is using and found that TB is using over 10GB. See attached. I don't know why it is so large. I don't need to store any messages on this computer. I have a desktop that is my "base station" where I want to save all (but deleted) messages.

I don't know if this large amount of TB space is contributing to the problem. Any help would be appreciated.

Asked by petejc 1 year ago

Answered by Toad-Hall 1 year ago

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Signature font colour (HTML)

I have created a HTML signature, defining the font, size, color and bold - as below However, the color is not taking effect and remains black, despite it showing so in we… (read more)

I have created a HTML signature, defining the font, size, color and bold - as below However, the color is not taking effect and remains black, despite it showing so in web based html editors.

EG:

My sig text here

Asked by breakwater-coaching 10 months ago

Answered by Toad-Hall 10 months ago

  • Archived

Inbox not displaying Thunderbird emails on PC. Please Please help!

Hi, My inbox shows that there are messages in the inbox but it does not display them. Any action on the inbox gives the msg. "The current operation on "inbox" did not s… (read more)

Hi, My inbox shows that there are messages in the inbox but it does not display them. Any action on the inbox gives the msg. "The current operation on "inbox" did not succeed. The mail server for account (my Optimum acct) responded: IMAP4 server terminated connection." I can see the messages on the Optimum website.

I forwarded my incoming mail to a Gmail account and can see the incoming msgs there. Also as can see them on my Apple phone.

Upgraded to latest version of Thunderbird. No help. Other folders seem okay. When I look at the ImapMail folder, I see the msf file for INBOX but I do not see a file for the inbox emails.

I am on Windows 11 and use MS Defender for security

Please help - Thunderbird is my workhorse and contains all my important files. Thank you! Carol

Asked by mcleod6 2 years ago

Last reply by mcleod6 1 year ago