Thunderbird Community Forum

> Mozilla Community Newsletter - Jun 2026 > > > Mozilla Community > ( https://clicks.mozilla.org/f/a/cDihyTJLBn2fv-I1Oo--6Q~~/AAQRxRA~/zgbdpFCB_AkKLZBZTmReytDN8nG5bhg-5yYz-T8TcI1odP-WpwuayUwpRHmM1Czxm-9Hc7dcwQHwdb5BzeI_66ywiQIq7tyFkk9VBsCjsYFCFlf2T_RE8powhVA4ym1VXqZSPSRKB3D0RJl1iaOi-5YM_zHdrYw4XfvwOnLRSPiqTxT-xybfFWRHq4xFZIyJVLTaHs1moC21o30HeJ5SFW2O6XxPQirpup2CDXGOcNvGXV1lav1liddTdzqn3pDu ) > Welcome to another Firefox community roundup! > > This month, we’re taking a look at what’s next for Firefox. > From an upcoming visual refresh and a peek behind the new design > system to hidden features you may never have used before. We're > also highlighting a recent Reddit AMA on the new Firefox product > Roadmap and celebrating community contribution that’s making > collaboration in Pontoon even better. > > Let’s dive in! > > ************************************** > ✨ Firefox gets a fresh new look. Soon! > ************************************** > > Firefox is evolving with a refreshed design that makes the > browser feel more modern, approachable, and consistent across > desktop and mobile. The refresh also extends to Firefox’s voice > and writing style, making product experience feel more human, > direct, and unmistakably Firefox. If you’re excited about these > changes, make sure to keep an eye out for an upcoming foxfooding > opportunity later this month! 😉 > > Learn more > ( https://clicks.mozilla.org/f/a/o-cQ-iIaCVllpeje2eZpLg~~/AAQRxRA~/ZsMJiLMJAQ_uUieEfWqZxqX1MGtpIwPuQojOAk73vsstcO5kvXYzOYiZ-xLqF81oKEibU0tr1Vvw13SNfbQ7SAoxgZQP3stf0TSvvfT1oOGhGtGfgpSmjrNqMxI4H0VwJNfAfhFA5W92ApzOswCNHB3JpULt-PxlHEvYSA5m2DqBhTNjmw3deCyc6SS3Og58UnzT5ATd7suQkWB1lOJ5kwVkz0MNwzh-JC8_k_GqVZOZggsKuFyjVZJsKq7wMQoyRXRY1hm5K83l_ftQEB8NwyjCVjkkQp4_qxMybzRLLNdBvk9Pv4Eh9zxXL1VMePO7WNzUWL4xb-Rs1TcZJgCoww~~ ) > > > ************************** > 🦊 Firefox can do all this? > ************************** > > Sreenath from It's FOSS rounded up 21 Firefox features that > many users never discover. From the built-in Eyedropper tool and > Picture-in-Picture to vertical tabs and other productivity > features, there's plenty to explore. See how many you've already > used! We could even turn it into a fun bingo at our next > community event. > > Read more > ( https://clicks.mozilla.org/f/a/lrmqL7cc061SsMz-5_P5eg~~/AAQRxRA~/-WpjGoghmNAyAxh_Joy5Bf3QGdysN2iznH9COjDh10aJdAiiWx-972BrrXwsA08TnsJN4RIO1KMn6Jocso8SgjSo5pe6WMf78mo1jNf2b4DWE-bBUC34xkT3SkNrP4I0eTIUqr0ePDTlWR3OCKASthVkKBj5mf6ArVQnaALCN-qsnVPxR4kUTkD1Kb487jbeB3vqlrpuO09yE97y7u0Iqhoy0dMU-lNmlSAvJmx7NIN6UzG74zNxC-ZoltCvxpSbivD2F6Sn2Ixqi5Q7fQVXBB7qfFgcVvzXtkRo0lzcV90~ ) > > > *************************** > 💬 From the Reddit Community > *************************** > > Firefox leaders recently joinedr/firefox > ( https://clicks.mozilla.org/f/a/_9rxxdwWPIBAo2ISBB2ABQ~~/AAQRxRA~/8NSP8TEJYKaJQOH94ovHjBlU7dz5mGnHucixg3mZwUGrgK0mE9FWYX91EhtYFsw34iltulyra7uoBgv3wUHhmSX1h0OD89QN0HTYUA_uSbZUeARO3Bi02B4Jh-nkyaFg ) for a live AMA to answer > questions about the newly launched Firefox Product Roadmap. > Community members asked about everything from Android > improvements and Containers to Project Nova, PWAs, performance, > and future browser development. The conversation generated a wide > range of discussions and provided valuable insight into what > Firefox users are most excited, and concerned, about. > > Read the full AMA > ( https://clicks.mozilla.org/f/a/zk_FpBjqVHbWv93TlhsTFw~~/AAQRxRA~/zwK9AwfUIMkejXJOlC5lzEjBJwoBHphK4sUH5SufDO67kdjRMSzATA-ElVCOpexsmVJ4NJ_5M73Bbq9VKTJIFk7fi2yg76FpDNtbhC4Qgq8wuzfaIUhPv4aMMC_7iVMFPZL2yZ_mQt2wnNq1-ZwY1bzSI_CK7S5FTUZXRz8-IXi6natS8Ouggw87y-cn6Kdc9HZgw1UEfZPxb99fGnYs2Olg195ZpgGiJkTn-UBvRQBITshm1r4UsoEIpM21GHjwDASu1AHfMoWoyBRur5CB1WbF4GpjwHc2t4Uq9IuvTl5Tw-JOI1kv6t1hZl6i8gketpBhVZSTjhlurNAF15jykMVvj8Vx4z-KWYJoOemQqkg~ ) > > > ********************* > 👤 Community Spotlight > ********************* > > Collaboration in Pontoon just got a little easier. Thanks to > volunteer contributor Serah Nderi, users can now edit and delete > their own comments, while project managers can remove comments > for moderation purposes. This long-requested feature helps reduce > clutter, improve discussions, and makes collaboration smoother > for localization teams. > > Read more > ( https://clicks.mozilla.org/f/a/BS-2B3861DuET5-jKQp2bw~~/AAQRxRA~/CqXkFzn3xyfpm-eIkG_3osLGbxfVivEwRyh_icMmiL9Zl_0-ng-y8A_82Me5W4A_pQmWMNh5glImAF3GAo1PRt0zyfop02voiVjFdFW1c3xQnAM71G-uQHIL--LhGFkq70PsAQI8bjgDRV5NoK_t0sVxylyBEYT6cra5mU_qJlOc_XEffBGUU_ulrldSq3uTH8lhKsNoP31-hexVRzbWQbmjBWKbbMJaktPt9HtVz46icFKbeKpuR32tFK5hKFU7Z2aGp-DXCOrUBFXMhyOkdgyMf7umYPiNxCEwqUlerv1zPtyLYuKPWPy-BlwvkYc5Ro-MjU7KPNW8bQkhhW40XA~~ ) > > > Keep on rocking the free web, everyone! > > Community Teams at Mozilla > > YouTube ( https://clicks.mozilla.org/f/a/X3SHVH_xTh_rf52Vbcf-8w~~/AAQRxRA~/T6LI-c81uVgpymjlqFpZkPPMHFPKgHG5Go1ECxYnxd3LcSNJvotobrXxHWKFNDjssvHx5NtDZZIohMxoxm9CSYg1Zrz3Bnfte3N_ZUxNyEMzgo9ZM_MQmMYoVL0PSjmt ) Instagram > ( https://clicks.mozilla.org/f/a/qtXIWA2wqu5ges2F1gBY7A~~/AAQRxRA~/ut2ze1dSEViXApvbVcJqiQa6LlJWTaunEPOnkoZMas7kVS0Vt5fyuhf_o5dz3MsegSHXUdz_-qgveANkxeJH0jJrIJcrN4uPOsxjH6dfvb8dosrvKUWFodwNd1W8mMGn ) Twitter > ( https://clicks.mozilla.org/f/a/wGdsoZcNBidH3dKsCTm_Bg~~/AAQRxRA~/EAgKKuiaNdklwft6B1S4_zRs57NimmHsAFgR1Rkatl3fk39cUO9bUej8Zjg8ojZugUDCDbf5CYh8WGBUHIuNuqQjmr4KffLJByYJO5D1U8AVqmJ0sIgJhUN8yGaqb5gO ) You’re receiving this email > because we think you're neat, AND you subscribed to hear from us. > If our emails aren't sparking joy, we'll understand if you > unsubscribe > ( https://clicks.mozilla.org/f/a/ouDio7Oxk7A6W2Ni_TdqEA~~/AAQRxRA~/4r3Mh3wmQ0nW7h35bSbhYSs9vb99K4lBGvUCk9IZsu9-05t_BobWMuEWA733jcUuCa5AllU1x08zKHf8y0aCzLVoNFf8zuU2QYBLmk0m74uJAPjHf9-jKfd0nJWweDuY-RH6c6s_9dfIkKL2L7vj91KFg9d0yNW57C_mfvoclBXBOyTf_1mRlYNMw0RyMNfp ) > . > > You can also update your communication preferences > ( https://clicks.mozilla.org/f/a/ouDio7Oxk7A6W2Ni_TdqEA~~/AAQRxRA~/4r3Mh3wmQ0nW7h35bSbhYSs9vb99K4lBGvUCk9IZsu9-05t_BobWMuEWA733jcUuCa5AllU1x08zKHf8y0aCzLVoNFf8zuU2QYBLmk0m74uJAPjHf9-jKfd0nJWweDuY-RH6c6s_9dfIkKL2L7vj91KFg9d0yNW57C_mfvoclBXBOyTf_1mRlYNMw0RyMNfp ) > at any time. > > Mozilla logo ( https://clicks.mozilla.org/f/a/wAEgWYnqHsmpG0xJrVgUvw~~/AAQRxRA~/poFi7k_V-tewzvlxOuwlAbG1te-kYX8PqxdLE-Xwl3_oZtXYRNxsfyXKBJEmXshGt_RkoZA-ZDXdCbORVOLj9KxDbxKD1HwYLg3bolvj1LHsAanaaXNksbp3yTuJB_3d ) 149 New > Montgomery St, 4th Floor, San Francisco, California 94105 USA > > Legal ( https://clicks.mozilla.org/f/a/r-YRkQF4J_7o3fjvnWDePQ~~/AAQRxRA~/h57lIE0A-xHTDfdaf2jcYaEVYL_D9PqYkxh2ml3nbkTgWQE-uKnr4cp2z7ePxXOLm6qLGlTvJ0nx9TzJdkUCtNAZgyyIhS2SKtZ0mr0sg6m96INkUC7q9wOmfJDftklihA2Y07XBzcnmOjmyqrI6mQ~~ ) • > Privacy ( https://clicks.mozilla.org/f/a/BNNBiIbN8Rmkb2h6C7rNxw~~/AAQRxRA~/cQm94SVQS3Zy0hXyXbiSBGSqVeRPn7fmC-bPZiIjMRLUmkqAYunCa2Qwb3bcgF4pomzFBhPniAnml6xIVOO-xUfO6CYft85C2iHEp0lPq7ZWFVy6256ROrEo6hdZU_5c5qDcnaVAFZqV5H-51PUIYg~~ ) • Support > Mozilla Foundation > ( https://clicks.mozilla.org/f/a/biVg390cioOzT6o_YOUzFQ~~/AAQRxRA~/h57lIE0A-xHTDfdaf2jcYadBg7yi--ht_gTSv46knVgxJEAG-PlkFhmxtDzZY2IQemjNaGZ5FLztRdpAwl0pmTJLCwkuTEXDxEmJ8bRJ5FgKPPQ5pWHi-D-Lv8q9qlt6_LeT4K3-vHnkhdcf-VcZTg~~ )

Hi David This is the last attempt I did but it failed. Enclosed is the screen shot you have asked for. Keep in mind my WIN 10 has 64 Bit but the last update from Thunderbird was 32 Bit

Heinz

Hi,

I was wondering the reason for the change in version 154 about changing the minimize to tray behaiviour when pressing the minimize button to minimizing when pressing the close button. Is there a standard? Why not make it a 2 way option, for users that prefer the older function?

Thanks.

Thunderbird Send message Error Sending of the message failed An error occurred while sending mail. The mail server responded: Must issue a STARTTLS command first. For more info, go to https://support.google.com/a/answer/3221692 and review RFC 3207 specifications. ffacd0b85a97d-47aa0f2186bsm33992962f8f.36 -gsmtp. Please verify that your email address is correct in your account settings and try again.

Note: I could not find the suggested specifications as indicated in the error message!

I did not change anything, the sending error occurred suddenly , all my settings IMAP Mail Server Port 993 SSL/TLS OAuth2 and SMTP Port 465 are still set to default. I changed also the SMTP to an new shown default 587 but non of this settings resolved the problem

Considering migrating from Outlook to Thunderbird (TB), as it is a logical potential path. Best I can tell from AI input is placing my message store on a network share (colocated, stable network), would likely be unreliable. Said that TB storage format was basically fragile and subject to corruption if there was any kind of hiccup in the data transfer or if something happened during a power outage for example. Wanted to see how the real community felt about that and if it was indeed inadvisable to do so.

For a week or two I haven't been able to send any email from Thunderbird. I use smtp.gmail.com as my outgoing server, and have it configured using SSL/TLS on port 465 with Oauth2 authentication. I first saw this on an older TB version, but have now updated to Thunderbird 152.0.1 on MacOS Sequoia 15.7.7.

When I try to send email, a dialog pops up saying "Enter credentials" for my account, then "Verify it's you". When I click on Next it asks me to "Complete sign-in using your passkey". I believe at this point another window is supposed to pop up and I can use a fingerprint to enter the passkey, but that window never pops up. I have tried 3 different default browsers: Firefox (my usual one), Google Chrome, and Safari. All behave the same. Firefox might be suppressing Javascript, but the other two certainly aren't.

Is there some system security setting that might be preventing Thunderbird from opening a window in the default browser, or does Thunderbird maintain its own record of the browser? Any other suggestions on how to get the passkey challenge to appear?

Hello community,

at my place of work no one can send or receive mail anmore using Thunderbird. The problem suddenly appeared last monday. No changes regarding the network or settings in Thunderbird happened prior to this.

Here's what I tried so far and things I can rule out:

• same problem appears on all devices (desktop and laptop PCs) in our office
• our work mail server is online and working, I can access everything using the webmail-interface in the office network
• new installation of Thunderbird without any profiles and fresh account confguration doesn't solve the problem
• I can connect to our mail provider and send and receive mail when using my home network or my personal phone hotspot
• I can connect to my private mail provider using Thunderbird while in the office network
• troubleshooting mode doesn't solve the issue
• renewing the internet connection on our router temporarily/once allowed some devices to receive mail
• pinging the mail server (mailserver.[workdomain].de, no specific port) via command line was successful while Thunderbird was unable to connect to the mail accounts

IMAP-Log returns the following error codes:

• D/IMAP URL failed with code 0x804b000e
• D/IMAP URL failed with code 0x804b001e

I would be glad if somebody could help me out. If you need any more details I'll provide them. Thanks in advance!

I have not been able to log in and operate my personal email on Earthlink.com for about the last 6 months using my MacBook Air. It refuses to accept my many valid attempts over the months to update the email password. To overcome this difficulty, I have updated all 140.12.1esr (aarch64) involved software, still to no benefit. My wife on her MacBook Air has been routinely checking my Earthlink email as she and I (on my MacBook) have been able to do with Thunderbird for over 20 years. I find this very frustrating and tiring.

  I hope some of you out there have a working solution for me.  It will really uplift my life !

- Alan Olson in Lebanon PA

Hi all!

I'm having some issues with using Thunderbird with my Outlook account. From a fresh Thunderbird profile, I can sign in to the account, and get the Microsoft authentication popup. Afterwards, Thunderbird works until I close and reopen the app. After that, I get authentication failures when fetching mails.

This is only with IMAP. POP works, but I'd like to sort my emails with server-side rules.

My system is freshly updated (Thunderbird 152.0 on CachyOS 7.1.3-2).

If anyone could help me, I'd be much obliged!

Cheers!

When email downloads from my internet server to thunderbird how do I indicate that the message is to be deleted from the server. ie I dont want the message to be in two places . At the moment after reading the email and saving it to a folder I have to log into my internet provider and delete the email.

I have an issue when trying to forward an email that contains an attachment. I receive the following error message:

"Sending of the message failed. There was an error attaching the file. Please check that you have access to the file."

I am using Thunderbird version 152 on Windows 10 Pro.

This issue only occurs when forwarding emails with attachments. Other email functions appear to work normally. Has anyone else encountered this issue? I would appreciate any help or suggestions. Thank you in advance.

TBird connected to AOl fine for several years. Now, today, TBird tells me that my AOL password is incorrect. I changed the AOL password but TBird still does not work. I can sign on to AOL just fine using Chrome and going to the AOL web site, but TBird will not sign me in. Please help.

None of my sent emails are accessible. When I go to the sent folder after sending an email, the emails are not there. Same with deleted emails. When I go to that folder, they are not there. Why is Thunderbird email so overly complicated? I think I need a better email provider. I am only using it because gmail will no longer support 3rd party emails (for my business.)

Thunderbird functions normally (sends/receives), except after Windows 11 goes to sleep, I log back in without difficulty., but attempting to use Thunderbird to send email fails with the message

"Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.mail.me.com failed. The server may be unavailable or is refusing SMTP connections. "

There's no prompt to re-enter the primary password, and the only way to restore normal Thunderbird operation is by rebooting WIN 11. Is this a known bug with a workaround? The failure occurs whether the outgoing server is smtp.mail.me.com (Apple), smtp.comcast.net, or smtp.gmail.com

I'm getting off a Verizon phone account and want to export my contacts before I do. I use an (old!) iPhone 8 so I can't export using their Verizon Cloud app because my operating system is too old. Is there a way to import into Thunderbird using a USB cord? Or is there a recommended non-evil app that could allow me to do the same with my phone contacts?

I've had a Thunderbird email account for years. My laptop quit, so I've set up the account on a new laptop. I discovered that I hadn't saved my Thunderbird password, so I followed the procedure for "forgot password". This included a new p/w, and I also got a Mozilla PIN (for future Microsoft Password Manager use), and got a Mozilla Account Recovery Key, again for future use. But I can't log into my Thunderbird account. I get the message "Authentication Error" (Wrong p/w, email, etc.) Changing IMAP / POP settings didn't help, though I did go with the recommended IMAP setting.

Any suggestions?

Allan

Locked out of my emails since Feb 26 2026: [redacted] @hotmail.com [redacted] @hotmail.com [redacted] @hotmail.com

/edited email from public community support forum.

First my email providers web site works perfectly. I called them and double checked the proper settings. I can download my emails no problem. I disabled my antivirus program, and I have tried all the suggested settings and still no send. I installed Betterbird used the same settings Spectrum said to use for thunderbird and it sends and receives no problem so what's wrong with my Thunderbird?