Thunderbird Support Forum

I am sending an email to several people and others as a BCC. If one of those people who receives it as a BCC hits "reply all", will everybody see his reply? Or do BCC recipients even have the option to reply all?

I tried using Thunderbird to check my Office 365 email, with the following settings

IMAP: outlook.office365.com Port: 143 SSL: STARTTLS

SMTP: smtp.office365.com Port: 587 SSL: STARTTLS

Normal Password

All the settings are retried by Thunderbird once I enter the IMAP and SMTP details.

However upon clicking done, there will be a message saying "Unable to log in at server. Probably wrong configuration, username or password"

I have verified the username and password is correct, and also IMAP enabled for this account, but keep getting password wrong message.

I was connected to O365 with my work email but cannot send any message. IMAP works just fine, all folders synced regularly, but sending not work for some unknown reason.

SMTP setting is as follow: smtp.office365.com port 587 STARTTLS OAuth (this is correct setting, all others shows errors, including outlook.partner.cn & smtp.office365.cn, which is completely normal since I'm not in China).

The first thing that jump out is that my password is not OK, which is not correct. Password is OK. Click on "Retry" or "Enter new password" do nothing, just return the same pop up. If "Cancel", then receiving message with "unknown error 80004005" and all other blablabla about unknown reasons, with instruction to check my SMTP settings.

I've tried all variations available, but nothing works. Sometimes, at some moment after click on Cancel, it said "Message sent" and I can see it in my Sent Items folder, but it's fake because I never receive that test message to my personal Gmail address.

I have already tried all suggestions I could find (deleting passwords, resetting all, restarting, deleting and adding account again, changes in Config editor related to security.tls), but nothing worked for me.

My OS: Win 10 Pro, build 2004, TB version 78.3.2

Any advise is very welcome. Thank you all in advance.

I'm trying with utter lack of success to configure a Thunderbird install to link to a Gmail account via IMAP.

System Basics: Windows 10 Home, 64bit, fully patched. Antivirus by MalwareBytes 4.30 Premium, fully updated. No fancy firewall, just a regular router.

This account had been installed and working fine until a family member "helpfully" changed the Gmail password, but reauthentication fails. I enter the account details, including password, into the Thunderbird Accounts settings for the account; it pings Google and correctly retrieves all the IMAP settings, and when I click "Done" Thunderbird opens a browser window to Google's two-step authentication with the email address prepopulated. However, when I click the blue "Next" button on that authentication page, rather than advancing to a password screen, the browser simply deletes the email address from the text box and stays on the same screen (see attached image for what I'm talking about).

Things I've tried:

• Uninstall, reboot, reinstall Thunderbird.
• Turn off MalwareBytes protection.
• Uninstall, delete every registry key related to Thunderbird, reboot, reinstall Thunderbird.
• Clear cache on every browser on the system
• Change Windows default browser settings to either Chrome (see below) or IE/Edge
• Install new browser (Chrome wasn't yet on this PC), then change Thunderbird's file handler for https to Chrome (this is MUCH harder than it used to be as T-Bird v. 78.anything doesn't have the old "Preferences" menus)

Incidentally, changing browsers doesn't seem to make a difference in that pop-up browser window, so I suspect Thunderbird is using its own internal browser and not the system browser.

I have, and can send, the support info extract from T-bird to a support technician but am unsure of uploading it here. Nevertheless, I welcome suggestions ... this is driving me nuts!

It seems that Thunderbird follows the Windows 10 settings and installs Dark mode, making the emails/messages unreadable. From what I've read, the only way to correct that is to set Windows in Light mode, which is not always suitable.

It would be nice if Thunderbird had it's own Light/Dark mode feature, allowing the users to select which mode they prefer.

Any thoughts/suggestions on the matter?

Gmail is going to require OAuth 2.0 sign-in SFAIK, that means I will no longer be able to access gmail with Thunderbird. Are there plans for Thunderbird to meet the OAuth 2.0 requirement?

Hi,

i am currently using Thunderbird Version 68.11.0 - haven't had any problems - so far. Then all of a sudden it starts not working. I have not changed any settings whatsoever.

This message pops up: Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. You can retry or save the message locally to Local Folders/Sent It is a problem occurring only with our company's mail provider. The thing is it work just fine know it seems i can't even get any messages.

This is kind of urgent because i cannot work like this.

Please if you could help with any suggestions. Thanks a lot.

Thunderbird asked me to restart for an update and now all I get Is the following:-

XUL Runner Error: Platform version 78.5.0' is not compatible with minversion >=78.4.0 maxversion>=78.4.0

Can someone please help

I can not send emails after the new update I am getting this error. Sending of the message failed. Peer using unsupported version of security protocol. The configuration related to smtp.vcn.com must be corrected I have checked all settings and had the ISP check also and can not get past this error.Any help would be appreciated

Three days ago, Thunderbird started to give me a "Sending of password for user xxx.xxx@gmail.com did not succeed. Mail server pop.gmail.com responded: Username and password not accepted.

I checked that it was accurate in the Saved Passwords panel and it is. I've entered it manually and still get the error message.

When I log onto Google from any browser with this account, it accepts the password. I can then access my gmail account with no trouble. My Firefox password manager shows the same password that is rejected by TB. My Gmail Android app on my smartphone and tablet also accept my logons with the same password. Only Thunderbird doesn't. I've tried deleting my pop.gmail.com login entry and re-creating it under the xxx.xxx@gmail.com account.

I had a Google Security warning 3 days ago, so suspect somebody might have hacked the account, changed the password, but didn't save his new password anywhere, so I have no idea what new password he might have changed it to. I am going to try changing my entire Google password and see if this will allow me to reset the TB password, but any other suggestions would be appreciated.

I have several other gmail accounts on Thunderbird and all of my accounts use the same passwords set for their accounts.google.com under the separate gmail addresses. How do I find out what to do to fix it?

I got a new desktop box and installed Kubuntu on it. On my old box (Mint) I used Thunderbrid and I want to preserve my years of e-mails I stored on mail folders on my PC. On the new box I created my e-mail account making sure that it was not using the default mbox (all e-mail in 1 file) but maildir (each e-mail in its own file) as on the old box. But when I copy the "Local Folders" from my old to my new Mail directory, Thunderbird does list the directories (with subdirs " cur" and "tmp"), but does not appear to recognise the e-mail files.

In Thunderbird under menu there is "Tools" that has a wizard " Import". However when I select to import Mail, I only get a message "No application or file to import data from was found."

So how can I import my old mail files in the new Thunderbird instance?

I have been using Thunderbird for several years for my GMail accounts, and have always preferred to download my messages using the POP and SMTP protocols, rather than use the IMAP protocol which leaves them all on the web. Google now inform me that "To help keep your account secure, Google will no longer support the use of third-party apps or devices which ask you to sign in to your Google Account using only your username and password. Instead, you’ll need to sign in using Sign in with Google or other more secure technologies, like OAuth 2.0. What do you need to do? Email software, like Outlook 2016 or earlier, has less secure access to your Gmail. Switch to Office 365, Outlook 2019 or newer, or any other email software where you can sign in using Sign in with Google." These changes are due to take effect from May 30th. How can I prepare for them and still use the POP and SMTP protocols after that date? Is OAuth 2.0 appropriate?

Hi,

I have several Gmail accounts. I have been using Thunderbird for many years. POP3 I keep everything on my Desktop. I just got this from Google and I'm at a loss. Anyone have any idea if or how it will affect Thunderbird's login?

Google On May 30, you may lose access to apps that are using less secure sign-in technology ??????@gmail.com To help keep your account secure, Google will no longer support the use of third-party apps or devices which ask you to sign in to your Google Account (Link to my account) using only your username and password. Instead, you’ll need to sign in using Sign in with Google or other more secure technologies, like OAuth 2.0.

Learn more (Link to my account)

What do you need to do?

Email software, like Outlook 2016 or earlier, has less secure access to your Gmail. Switch to Office 365, Outlook 2019 or newer, or any other email software where you can sign in using Sign in with Google.

Learn more (Link to my account)

Finding it v difficult to sync thunderbird email with gmail, google contacts and google calendar on Windows 10. Not easy and addons don't seem to be there. May go back to using gmail as email client.

Dear team, I have been struggling a lot to adjust the font size of TB. I have not been able to find anything that can help (the css solution went right over my head sadly). Can someone please help? I can not read such small letters anymore. :(

Dear community, my customer is unable to send invoice email from his management software. They get the error "There is no default mail client or the current mail client...." I tried different solutions to set thunderbird as default mapi clint like changing registry key and reacreating mapi32.dll but without success. INFO: thunderbird 32 bit (last release), win 10 64bit

Can you please help me? Thanks

Hi everyone, maybe I'm missing something obvious, but I doubt I am the only one with this goal / question! I am trying to archive emails from an online provider to my local PC. I want to delete the emails from the online server and only keep a copy on my local archive. I have read the help here but did not find enough explanation regarding Archiving to know whether it is what I am looking for, or intended for a different purpose. Likewise with "Local Folders".

So I have potentially abused them both with the following configuration: 1) renaming my "Local Folders" account to "Archive", 2) setting my custom local folder under "Local Folders" (now "Archive") > "Local Directory", 3) creating subfolders for each email account, 4) specifying these folders under each "Account Settings" > "Copies & Folders" > "Message Archives" > "Other" > "<Folder Name> on Archive" (selecting the subfolder) 5) leaving Thunderbird on all night to synchronise

Unfortunately, the next day in my Archive folder were only tiny ".msf" files, so it clearly didn't do what I expected. So please tell me where I went wrong, and how I should rather setup my local archive. My aim is to delete online copies and move most mails offline.

Thanks a million in advance! Bruce

Thunderbird 91 opens inbox pdf attachments in a new tab instead of in Adobe Acrobat Reader. Is there a way to revert back to the old behavior where these were opened in Adobe?

Hello, I have used Thunderbird for years. However, I have been trying to set up a Proton Mail account and the setup fails! I have installed the Proton Bridge and have a paid account for Proton Mail. Attached is the error picture. How do I setup Proton Mail in Thunderbird? Please help!