You didn't share the details, but if you are creating accounts, and then exiting and restarting to find no accounts, there is a high likelihood that the prefs.js file in profile is being prevented from updating when thunderbird closes. Why that is happening I don't know, possibly an antivirus. You might check in the profile folder to see if there are multiple prefs.js files, as that would be a clue.

I only have the Windows Antivirus... unfortunately it still does not work... Create it and the next time you open it, the email account is gone again.

Do you have multiple prefs.js files in the profile? Is the prefs.js marked as read-only? I have no solution, but something is preventing an update.

What more can i do?

Are you running a VPN? Do you run any antivirus? Maybe an autobackup utility? To save what you have, this may work: '

1. exit thunderbird
2. in profile, delete all prefs.js except the one with the highest number
3. rename that one to prefs.js and restart thunderbird, as that may have the account info for you.

Still the same problem... i cannot orden the Dates und new emails accounts are deleted when i close the program.

What can i do?

Application Basics Name Thunderbird Version 128.3.1esr Build ID 20241009142959 Distribution ID Update Channel esr User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Thunderbird/128.3.1 OS Windows_NT 10.0 22631 Launcher Process Enabled Multiprocess Windows 0/0 Fission Windows 0/0 Enabled by default Remote Processes 2 Enterprise Policies Inactive Google Location Service Key Missing Google Safebrowsing Key Missing Mozilla Location Service Key Missing Safe Mode false Memory Size (RAM) 15,4 GB Disk Space Available 369 GB Mail and News Accounts ID Incoming server Outgoing servers Name Connection security Authentication method Name Connection security Authentication method Default? account1 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account2 (none) Local Folders 0 3 account3 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account4 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account5 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account6 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account7 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account9 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account10 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account11 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account12 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account13 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account14 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account15 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account16 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account17 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account18 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account19 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account20 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true account21 (imap) mail.your-server.de:993 3 3 mail.your-server.de:465 3 3 true Libraries

Library Status Expected minimum version Version in use Path RNP (OpenPGP) OK 0.17.1 0.17.1.MZLA.128.3.1esr.botan C:\Program Files\Mozilla Thunderbird\rnp.dll OTR Failed to load. OTR chat encryption will not work. - - - Calendar Settings Home Name Value Name Type storage Disabled true Username URI Refresh Interval Read-only Suppress Alarms Cache Enabled iMIP Identity id1 iMIP Disabled iMIP Account Organiser Id Force Email Scheduling Popup Alarms Supported Alarms on Invitation Supported Max Alarms Per Event Attachment Supported Max Categories Privacy State Supported Priority Supported true Event Supported Task Supported Local Time Supported UTC/GMT Supported Auto-Scheduling Supported Crash Reports for the Last 3 Days Report ID Submitted Remote Processes Type Count Isolated Web Content 1 GPU 1 Add-ons Name Type Version Enabled ID System theme — auto theme 1.3 true default-theme@mozilla.org Amazon.de extension 1.1 false amazon@search.mozilla.org Bing extension 1.0 false bing@search.mozilla.org Chambers (UK) extension 1.0 false chambers-en-GB@search.mozilla.org DuckDuckGo extension 1.0 false ddg@search.mozilla.org Ecosia extension 1.1 false ecosia@search.mozilla.org Google extension 1.0 false google@search.mozilla.org LEO Eng-Deu extension 1.0 false leo_ende_de@search.mozilla.org Wikipedia (de) extension 1.0 false wikipedia@search.mozilla.org Language: Deutsch (German) locale 128.3.20240930.164946 false langpack-de@thunderbird.mozilla.org Dark theme 1.3 false thunderbird-compact-dark@mozilla.org Light theme 1.3 false thunderbird-compact-light@mozilla.org Security Software Type Name Antivirus Microsoft Defender Antivirus Antispyware Firewall Windows-Firewall

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Display0 1920x1200@60Hz scales:1.000000|1.500000 DisplayCount 1 HardwareStretching both=1 window-only=0 full-screen-only=0 none=0 error=0 OverlaySupport NV12=Scaling YUV2=None BGRA8=Software RGB10A2=None SwapChainTearingSupport Supported GPUProcessPid 18356 Window Device Pixel Ratios 1.5 ClearType Parameters Gamma: 1.8 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 50 Font Visibility Debug Info Windows Platform WebGPU Default Adapter [object Object] WebGPU Fallback Adapter [object Object] Decision Log HW_COMPOSITING available by default D3D11_COMPOSITING available by default DIRECT2D available by default D3D11_HW_ANGLE available by default GPU_PROCESS available by default WEBRENDER available by default WEBRENDER_COMPOSITOR available by default WEBRENDER_PARTIAL available by default WEBRENDER_SHADER_CACHE available by default WEBRENDER_OPTIMIZED_SHADERS available by default WEBRENDER_ANGLE available by default WEBRENDER_DCOMP_PRESENT available by default WEBRENDER_SCISSORED_CACHE_CLEARS available by default WEBGPU available by default blocked by runtime: WebGPU cannot be enabled in release or beta WINDOW_OCCLUSION available by default VIDEO_HARDWARE_OVERLAY available by default VIDEO_SOFTWARE_OVERLAY available by default HW_DECODED_VIDEO_ZERO_COPY blocked by default: Blocklisted by gfxInfo VP8_HW_DECODE available by default VP9_HW_DECODE available by default REUSE_DECODER_DEVICE available by default BACKDROP_FILTER available by default CANVAS_RENDERER_THREAD available by default ACCELERATED_CANVAS2D disabled by default: Disabled by default failed by runtime: Disabled with non-zero canvas worker threads REMOTE_CANVAS available by default Media Audio Backend wasapi Max Channels 2 Preferred Sample Rate 48000 Roundtrip latency (standard deviation) NaNms (NaN) Output Devices Name Group Vendor State Preferred Format Channels Rate Latency 1 - FullHD TV (AMD High Definition Audio Device) HDAUDIO\FUNC_01&VEN_1002&DEV_AA01&SUBSYS_00AA0100&REV_1007\5&79adabd&0&0001 Unplugged None default: F32LE, support: S16LE F32LE 2 default: 48000, support: 48000 - 48000 0 - 0 Lautsprecher (Realtek(R) Audio) HDAUDIO\FUNC_01&VEN_10EC&DEV_0256&SUBSYS_104317EF&REV_1000\5&1b620135&0&0001 Enabled All default: F32LE, support: S16LE F32LE 2 default: 48000, support: 48000 - 48000 144 - 512 Kopfhörer (Realtek(R) Audio) HDAUDIO\FUNC_01&VEN_10EC&DEV_0256&SUBSYS_104317EF&REV_1000\5&1b620135&0&0001 Unplugged None default: F32LE, support: S16LE F32LE 2 default: 48000, support: 48000 - 48000 0 - 0 Input Devices Name Group Vendor State Preferred Format Channels Rate Latency Mikrofonarray (Realtek(R) Audio) HDAUDIO\FUNC_01&VEN_10EC&DEV_0256&SUBSYS_104317EF&REV_1000\5&1b620135&0&0001 Enabled All default: F32LE, support: S16LE F32LE 2 default: 48000, support: 48000 - 48000 144 - 480 Stereomix (Realtek(R) Audio) HDAUDIO\FUNC_01&VEN_10EC&DEV_0256&SUBSYS_104317EF&REV_1000\5&1b620135&0&0001 Disabled None default: F32LE, support: S16LE F32LE 2 default: 48000, support: 48000 - 48000 0 - 0 Mikrofon (Realtek(R) Audio) HDAUDIO\FUNC_01&VEN_10EC&DEV_0256&SUBSYS_104317EF&REV_1000\5&1b620135&0&0001 Unplugged None default: F32LE, support: S16LE F32LE 2 default: 48000, support: 48000 - 48000 0 - 0 Environment Variables MOZ_CRASHREPORTER_DATA_DIRECTORY C:\Users\rrega\AppData\Roaming\Thunderbird\Crash Reports MOZ_CRASHREPORTER_EVENTS_DIRECTORY C:\Users\rrega\AppData\Roaming\Thunderbird\Profiles\g87hoj60.default-release\crashes\events MOZ_CRASHREPORTER_PING_DIRECTORY C:\Users\rrega\AppData\Roaming\Thunderbird\Pending Pings MOZ_CRASHREPORTER_STRINGS_OVERRIDE C:\Program Files\Mozilla Thunderbird\crashreporter-override.ini Important Modified Preferences browser.search.region DO extensions.lastAppVersion 128.3.1 idle.lastDailyNotification 1702487570 media.gmp.storage.version.observed 1 media.hardware-video-decoding.failed false places.database.lastMaintenance 1702487570 privacy.purge_trackers.date_in_cookie_database 0 storage.vacuum.last.index 1 storage.vacuum.last.places.sqlite 1701221463 ui.osk.debug.keyboardDisplayReason IKPOS: Touch screen not found. Important Locked Preferences fission.autostart.session true Places Database Accessibility Activated false Prevent Accessibility 0 Accessible Handler Used Accessibility Instantiator Library Versions

Expected minimum version Version in use NSPR 4.35 4.35 NSS 3.101.1 3.101.1 NSSSMIME 3.101.1 3.101.1 NSSSSL 3.101.1 3.101.1 NSSUTIL 3.101.1 3.101.1 Sandbox Content Process Sandbox Level 0 Effective Content Process Sandbox Level 1 Win32k Lockdown State for Content Process Win32k Lockdown enabled -- default value is true GPU Process Sandbox Level 1 Startup Cache Disk Cache Path C:\Users\rrega\AppData\Local\Thunderbird\Profiles\g87hoj60.default-release\startupCache\startupCache.8.little Ignore Disk Cache false Found Disk Cache on Init false Wrote to Disk Cache true Internationalisation & Localisation Application Settings Requested Locales ["de","en-GB"] Available Locales ["en-US","en-GB"] App Locales ["en-GB","en-US"] Regional Preferences ["de-DE"] Default Locale "en-GB" Operating System System Locales ["de-DE","en-GB"] Regional Preferences ["de-DE"] Remote Debugging (Chromium Protocol) Accepting Connections URL